Characters / One-Punch Man: Monster Association

One-Punch Man Main Character Index
Saitama | Hero Association (S-Class Heroes) | Neo Heroes | Villains and Monsters (Garou | Monster Association) | Others

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Monster Association

A group of monsters led by Gyoro Gyoro and Orochi that aim to destroy both the Hero Association and humanity to make a world where monsters reign supreme. They are the main antagonists for much of the Human Monster Saga (Monster Raid, Super Fight, and Monster Association Arcs specifically).

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Monster Association (in general)

• Adaptation Expansion: In the webcomic, there are only 17 members. The manga however has a bit more than 500, hence why the fights between heroes and monsters take much longer.
• Always Chaotic Evil: The process of becoming a monster twists morality, rendering a person evil by nature.
• Arc Villain: Of Human Monster Saga, specifically Monster Raid/Super Fight arc and Monster Association Raid arc.
• Armed Females, Unarmed Males: The male members of the Monster Association either fight unarmed or use weapons that are part of their bodies. On the other hand, all but one its female members use weapons:
  • Do-S fights with a whip which she uses to enslave people to her will.
  • Maiko Plasma has a Thunder Drum attached to her back which she needs to strike with a drumstick for it to fire electricity.
  • Eyesight wields a Serpent Staff. However, unlike Plasma and Do-S, she is capable of fighting without her weapon and doesn't need it to channel her special abilities.
  • The sisters Reptera and Raptora use knives and a machete, respectively. They can also produce poison.
  • Lord Psykos, the true controller of Gyoro Gyoro, is a powerful esper and doesn't need weapons in battle unlike the other female members.
• Anyone Can Die: At the end of the Human Monster Saga, merely a few survive or are MIA, and even then all of them are in their weakened states. So far the ones revealed to still be alive are: Psykos, Black Sperm, Black Rover and Phoenix Man. The rest who's fate remain unknown are: Nyan, Gale Wind and Hellfire Flame, Devil Long Hair, Do-S, Electric Catfish Man, Maiko Plasma, Marshall Gorilla, Reptera and Manako.
• Asskicking Leads to Leadership: They're ranked in importance in the Association by their power. When Garou expresses disbelief that Overgrown Rover is counted as an Executive despite quite literally being a guard dog, his Demon-level opponents reply that sentience doesn't matter in the Monster Association as long as you have the power to back up your presence. Orochi, the supposed leader of the organisation, is its strongest member by far, requiring multiple normal punches and a Serious Squirt Gun (that shot LAVA) from Saitama to go down, and even that didn't kill him completely, thanks to his ability to regenerate. ^Note He used a serious punch against Elder Centipede, but only so that his corpse would be wiped out instead of crashing into the city.
• Asshole Victim: Their intent is too wreck havoc and kill as many innocent people and heroes as they can, so very few tears are sheded when they die gruesomely thanks to heroes or even some of their members.
• Big Bad Ensemble: The Association and Garou in Human Monster Saga.
• Brotherhood of Evil: They do call themselves an "association". Although they cooperate freely, and tougher monsters may not have actual authority over weaker ones, but all do obey Orochi and Gyoro Gyoro.
• Evil Counterpart: To the Hero Association as a whole. The organization built itself as an answer to the Hero Association after all, taking on the same principle of gathering and organizing themselves to become a better force against their enemy (in that case, the heroes). They freely retake the threat levels the Hero Association has made for themselves, dividing their ranks according to their strength. Finally, their lair is a multi-layered Elaborate Underground Base while the Heroes' HQ is a humongous fortified tower.
• For the Evulz: Discussed. When Gyoro Gyoro champions Orochi as the king of the monsters, he's surprised none of the monsters at the meeting applause them. That's because the majority of the members simply just want to spread destruction and don't have much respect for their leaders outside of fearing them.
• Legion of Doom: A disturbingly effective one at first. Apparently, the Hero Association never counted on a group of monsters banding together as opposed to single minded attacks.
• Irony: The Monster Association is led not by a monster, but rather a human disguised as one.
• Nebulous Evil Organisation: As the name suggests, they are an association of monsters who want to cause as much destruction as possible and Take Over the World.
• Small Name, Big Ego: Many monsters think highly of themselves, thinking they can take down even S-Class Heroes... despite being merely a Tiger-Level threat at most. Not a far cry from other association...
• Smug Super: Most of them are pretty confident in their abilities, and some are very hard to kill, unless they face an S-Class hero (and sometimes, even these heroes have difficulty).
• Suspiciously Similar Substitute: Some of the original monsters who appeared in the manga have appearances and powers similar to their apparent webcomic counterparts.
• Teeth-Clenched Teamwork: They don't get along very well, and there are rules in place forbidding them from killing each other, though as Gyoro-Gyoro mentions, monsters can do it without overdoing it. There's also the implication that once their common enemy the Hero Association is gone, they'll devolve into fighting each other.
• Was Once a Man: Most of them were previously humans who gained a lot of power and turned into monsters by feeding them Monster Cells.
• We Hardly Knew Ye: Many of the monsters, mainly the below Demon-Level ones, don't receive much characterization and only exist as a fodder to heroes and to make an Association feel bigger with its member count.

Dragon-Level Members (Leaders)

"Monster King" Orochi

"Monster King" Orochi

Voiced by: Atsushi Ono (Japanese), Jason Marnocha (English)

Debut: Chapter 66 (Manga), Episode 18 (Anime)

Disaster Level: Above Dragon

A powerful, titanic monster who's the leader of the Monster Association. He is an Above Dragon-level threat.

He is revealed to be a figurehead for Gyoro Gyoro to rally monsters around, and owes everything to him due to being one of his experiments.

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• 0% Approval Rating: Pretty much none of the monsters really respect him and only follow his rules out of fear. Even those who seem to praise Orochi or give him some sort of respect just secretly want to overthrow him, like Psykos or Phoenix Man.
• Ambiguous Situation:
  • Tatsumaki atomizes him by drilling him through the earth after turning the Monster Association Base into an enormous spear drill, but nobody can confirm his death due to the Executives appearing to continue the battle, not to mention Drive Knight left the battlefield having obtained a sample of Orochi's flesh.
  • The altar that Orochi found deep below the Earth appears to suggest that Orochi is the sacrifice needed to awaken "God". However, it's unclear what "God" this is. "God" requires black cubes to communicate to people to offer them a deal in exchange for power and the recipient has to give... something. Yet, Homeless Emperor and Psycorchi got a deal from "God" or something like "God" without a cube. Or maybe "God" isn't using the cubes and something like "God" is. So, does Orochi's death mean the sacrifice is complete or did him taking the deal with "God" through Psykos count as the sacrifice? Is there one "God" or two? If there's two "Gods" which one did he make a deal with and which one was he sacrificed to? Since Tatsumaki didn't intentionally sacrifice Orochi to "God", does it still count? If "God" is responsible for Mysterious Beings and Hero powers, then why was Orochi so special given that he probably isn't the strongest monster on Earth? There's a lot of unanswered questions about this.
  • It’s also unclear if Orochi himself was assimilated into Sage Centipede, who bears a resemblance to him in some areas, after being destroyed yet again.
• As You Know: For some reason, Gyoro Gyoro has to explain to him his own organization's goals and methods. It's a hint that he's not really the leader, but rather a particularly powerful figurehead that monsters can rally around… or so Gyoro Gyoro thinks.
• The Assimilator: His heart, which is a shapeless mass of his flesh after Saitama destroys his body, can absorb other monsters and people to aid in his regeneration, and increase his power. He even tries to do this to Psykos to form another One-Winged Angel, but neither personality is in complete control.
• Attack of the 50-Foot Whatever: He’s a horned humanoid made out of snake-like dragons, and is several stories tall.
• Awesome by Analysis: He can immediately emulate a martial arts style just by observing them.
• Bad Boss: Orochi ate Awakened Cockroach for losing to Genos and returning despite that. Do-S narrowly avoids the same fate after Gyoro Gyoro tells Orochi it'd be a waste to kill her after just one loss due to how useful her ability is. Orochi warns her that next time she won't be so fortunate.
• Badass Boast: To Garou.
  As you wish, I will bestow upon you terror.
• Badass Cape: He wears a big cape and fits him to accentuate his leadership position.
• Beam Spam: He utilizes his smaller dragon headed tentacles from his body to rain fire from their mouths at his enemies. He also uses this in his Heart Element form by having several regenerating snake heads attack Tatsumaki from multiple angles during her fight with Psykos. Though it fails to do anything more than burn Tatsumaki a little, it does put her on the defensive enough to give him and Psykos the opportunity to merge.
• Big Bad: Of the Monster Raid, Super Fight, and Monster Association Arcs, and the Human Monster Saga as a whole. Though Psykos is The Man Behind the Man, he is intent on betraying her and putting her in her place, however, their Fusion Dance puts that plan temporarily on hold, and then she eventually splits off from him and runs away.
• Big Bad Ensemble: He is this with Garou for the Human Monster Saga.
• Big Bad Wannabe: After encountering an ancient underground temple and seeing a mural saying that God will awaken with a worthy sacrifice while also showing a picture of him, he decides that he will become a god by sacrificing Saitama on his temple's altar. Had he seen the altar's full mural, he would have realized that he was the worthy sacrifice to awaken God. To Orochi’s credit, though, even meeting God in person does not seem to deter him from wanting to become stronger until he reaches a level of godhood himself, although being absolutely shredded by Tatsumaki has presumably put that plan on hold for the time being.
• Big "YES!": He lets one out when Psykos notes that Tatsumaki is reaching her limit due to having suffered major injuries and having exhausted her abilities by tearing apart the city to destroy the Fusion Dance between Orochi and Psykos.
• Blood Knight: The only time he's him excited is an upcoming fight with a powerful opponent.
• Body Horror: The forms he takes during his fight with Garou are terrifying. Mouths and hands appear from inside other mouths, some limbs turn into snakes and dragons.
• Breath Weapon: He can do this from both his mouth and from the mouths of the snakes that come out from his tentacles.
• The Bus Came Back: Despite seemingly being dead after Saitama gets a clean punch on him early on and taken out of his own war on the heroes, Orochi scrapes by and regenerates, and reintroduces himself by being the first monster to harm Tatsumaki in the series.
• Combat Tentacles: The horns on his head serve as this, as he control them at will and make them contort like tentacles.
• The Corrupter: His body can create the Monster Cells that transform people into monsters.
• Curb-Stomp Battle: What he inflicts to Garou, while he's holding back on Gyoro Gyoro's orders to not kill him.
  • On the recieving end when he tries to fight Saitama like everybody else that tries to fight Saitama. Orochi is defeated with a combination of a single serious attack (Serious Squirt Gun) and a single direct normal punch (after a few normal punches that took out some of his dragons), and while he does put up a far greater fight than most of Saitama's other opponents (save Boros and eventually Garou), his most impressive feats only delayed the inevitable without even amusing Saitama much. He does, however, get credit for regenerating after multiple attacks, each of which would have certainly wiped out any other monster than himself, Lord Boros or Garou (thus far).
• Defiant to the End: Even after Psykos ditches him and all the heroes present gang up on him, he keeps on fighting for as long as he can, even attempting to reform yet again underneath the base, at least until Tatsumaki destroys that body too. This may be because he is aware that a piece of him was stolen by Drive Knight, implying the heroes still haven't seen the last of him.
• Devour the Dragon: A weird case in that Psykos and Orochi both clearly consider the other to be the "Dragon" in question. Orochi interrupts the duel between Psykos and Tatsumaki intent on devouring the former to restore his body and power to greater heights, even feigning some level of weakness so that Psykos comes to him first with her intent to usurp his power before surprising her. However, Psykos' will proves too strong for him to subsume completely. The result is the two of them still fighting for dominance even as they focus on destroying their enemies.
• Dragon-in-Chief: Although he initially seems subservient to Gyoro Gyoro / Psykos's control, he is far more powerful than she is and, as of his return in Chapter 128, seems ready to turn on her for his own personal gain. After all, the title of "Monster King" belongs to him rather than her.
• Eldritch Abomination: The best way to describe him, which makes one wonder just what the fuck did Psykos do to him to turn Orochi into such a nightmarish creature. Orochi is a writhing mass of dragons and energy that's condensed into a humanoid form to engage in conversation with Gyoro Gyoro. And that's before he gets serious in his fight with Garou.
• Evil Is Bigger: As the King of Monsters, he’s one of the biggest monsters in the Monster Association, with only Centichoro and possibly Hundred-Eye Octopus dwarfing him.
• From Nobody to Nightmare: According to Psykos, he was just some angry guy she found that was close to becoming a monster, but was otherwise still just some guy. Her experiments on him turned him into the monstrosity he is today.
• Fusion Dance: The result of his and Psykos's battle for control over the other, resulting in a massive winged moth-like entity, with both personalities still clashing in the hopes of overpowering the other. This fusion ends up dealing serious damage to Tatsumaki, although admittedly she was holding back her true strength so as not to endanger innocents.
• Godhood Seeker: He views his status as the Monster King as just another step towards becoming a god, and is seeking a worthy sacrifice to awaken himself.
• Horn Attack: His horns can extend and be used as weapons. One was capable of stabbing Garou clean through his body.
• Horns of Villainy: Gyoro Gyoro notes that they were the first traits he manifested upon becoming a monster.
• Large and in Charge: He towers over both Gyoro Gyoro and Psykos, and is the "official" leader of the Monster Association to the other monsters and the outside world.
• Life-or-Limb Decision: During his fight with Saitama, he sacrifices several of his serpents to take punches for him.
• Misanthrope Supreme: According to Gyoro Gyoro, Orochi turned his back to humanity in his backstory.
• Monster Lord: He is the leader of the Monster Association.
• More Teeth than the Osmond Family: Pretty much any points on his body that aren't his horns are gruesome, draconic teeth. Easily has more mouths than the Osmonds too.
• Nested Mouths: He has mouths within mouths within mouths, as was seen when he eats Awakened Cockroach.
• Non-Standard Character Design: Sort of. While this series is no stranger to scary-looking monsters, Orochi stands out because of how terrifying and inhuman he looks. This, combined with the fact that he used to be a man who abandoned humanity for power and his even more horrifying true form, has gotten people saying he looks like something out of Berserk.
• No-Nonsense Nemesis: During his Fusion Dance with Psykos, the latter does the majority of the talking and boasting, whereas Orochi simply sticks to fighting Tatsumaki and nailing her with everything the fusion has without saying much.
• Not Brainwashed: Gyoro Gyoro thinks he's been trained to serve him, but Orochi confesses to Saitama that he's just biding his time for now.
• Not Quite Dead: After being punched to pieces by Saitama, Orochi's heart manages to regenerate the rest of his body by absorbing other monsters scurrying around the base before turning his attention to Psykos and Tatsumaki.
  • Happens again after Bang and Bomb disintegrate his blob form with a combined attack. Tatsumaki notes that he's regenerating at the bottom of the base, so she rips the whole thing out of the ground and transforms it into a colossal energy spear drill, ripping his last (known) body to shreds, all while the heroes remain unaware that Drive Knight has stolen a sample of his flesh...
• Oh, Crap!: When Tatsumaki hurls the giant spear drill straight at him.
• One-Winged Angel: As if he isn't monstrous enough already, he can turn his entire body into a terrifying mass of fire-breathing serpentine dragons. It says a lot that Orochi probably is the most accurate representation of Typhon in a work of fiction. He also uses a more streamline humanoid form while fighting Saitama, indicating that it may be his most powerful one. Not that it means much to Saitama.
  • Exaggerated when he performs a Fusion Dance with Psykos, each one hoping to fully control the other.
• Orochi: His namesake. His body seems to made up of snakes with more snakes coming out of another snake's mouth.
• Power Copying: He can replicate any martial art just by observing the user and can utilize it with the same skill and efficiency.
• Playing with Fire: All his dragon heads can breathe fire, and when they work together they can start firestorms.
• Puppet King: Subverted. Psykos intended for him to be this, but Orochi himself has other ideas.
• Rasputinian Death: He's on the receiving end of multiple blows from Saitama, which tear his body apart, then he regenerates and merges with Psykos, then that form gets torn asunder by the combined efforts of Tatsumaki and Genos, then he and Psykos transform into a fighter jet which gets chased down by the other two plus Drive Knight, then the fusion becomes a bio-mechanical robot fighter, after which Drive Knight slices a fragment of Orochi off to keep for himself, then Psykos runs away with her tail between her legs and all heroes present in the area go to town on Orochi, destroying not one, but two of his blob transformations, culminating in Tatsumaki destroying the second one with a massive energy spear drill created from the base itself... and even then, that tiny little piece of him successfully made it out safely in Drive Knight's custody...
• Sharing a Body: The Fusion Dance between Orochi and Psykos has them retraining their personalities and the two battle for control of the body while simultaneously trying to defeat Tatsumaki. Orochi has an ulterior motive - he wants to absorb Saitama to complete his revival and become the most powerful being in existence.
• The Starscream: In Chapter 127, he begins thirsting for the blood of both Tatsumaki and Psykos, indicating he is tired of the latter's conditioning and brainwashing and is making a move to absorb her and truly take his place as the Monster King.
• Strong and Skilled: He's insanely powerful (he regenerates after at least three normal punches from Saitama, the last of which was clearly intended to be a killing blow) and he has the innate ability to copy any technique at a glance.
• Submissive Badass: He obeys Gyoro Gyoro even though he's far more powerful. He's content on doing so as long as she keeps feeding him, but the moment she has no more use in that regard...
• Super-Speed: Don't let his bulk fool you. He's fast enough to catch Awakened Cockroach despite the latter's Super-Speed and Spider-Sense, destroyed Metal Knight's drone faster than it could trigger its own self-destruct mechanism, and during the fight with Garou kills multiple monsters caught in the crossfire of his attacks faster than they could even react to.
• Super-Toughness: He takes all of Garou's attacks during their clash without any visible damage or even much reaction. Word of God states that he could even take a few of Saitama's punches and keep going. Indeed, even when Saitama's punch tears him apart, he manages to survive and even return with the capability to harm Tatsumaki even in a weakened state.
• Team Killer: He can kill many of his fellow monsters in his fights, shown when he's trying to catch Garou. He also restores his damaged body this way, by absorbing almost all of his underlings after his fight with Saitama.
• Ultimate Lifeform: Introduces himself as this to Saitama, who isn't amused.
• Underestimating Badassery: Averted and defied, since he is one of the rare opponents who immediately recognizes Saitama as a genuine threat. With just one look, Orochi immediately deduces Saitama to be the one who killed Elder Centipede, Gouketsu as well as the truth behind the monster of the ghost town. It is unknown if this has anything to do with the fact both him and Saitama broke their Limiters and if Orochi can somehow sense it, which may explain why he was able to ignore Psykos when she called him for help.
• Unskilled, but Strong: Garou notes that he's indeed terribly strong, but has nothing else to back it up. Massively subverted, he can actually copy any technique after a first glance.
• Walking Spoiler: As you can see on this page, it's hard to talk about his true goals without spoiling it.
• Was Once a Man: According to Psykos, he was just a normal human before she turned him into what he is now, albeit one who was already on the verge of becoming a monster anyways. She just... Pushed him even further than what he would have achieved on his own.
• We Have Reserves: When Gyoro Gyoro communicates him the defeats of some of the monsters, he simply remarks they can make more. He shows little concern for any monsters he kills while fighting Garou, either.
• The Worm That Walks: His body is made entirely out of giant snakes and dragons.
• Worthy Opponent: Orochi gets excited at the prospect of fighting a powerful foe like Saitama.
• Wreathed in Flames: Early in his introduction he wears a giant tattered cape, but this is set ablaze during his fight with Garou to cloak him in flame and give him an even more badass look. He's seen to still be cloaked in fire in every following appearance even after the fight.
• You Have Failed Me: As a Bad Boss, this is his reaction towards the monsters who failed in their tasks, like Awakened Cockroach, and nearly Do-S before he's convinced how useful she can be.
• You Have Outlived Your Usefulness: He thanks Psykos for feeding him so many monsters to make him more powerful before declaring that she's next. This is highly ironic considering she was supposed to have control over him. She's spared.

Gyoro Gyoro (Spoilers)

Gyoro Gyoro

Voiced by: Takehito Koyasu (Japanese), Bill Millsap (English)

Debut: Chapter 55 (Webcomic), Chapter 66 (Manga), Episode 18 (Anime)

Disaster Level: Dragon

SPOILER WARNING: Click ^here  to see his true form.

SPOILER WARNING: Click ^here  to see full body.

The mysterious military advisor and second-in-command of the Monster Association (and the organization's leader in the original webcomic), who uses telepathy to keep track of things. He has performed experiments and transformed people into monsters including the Monster King Orochi in his attempt to break the limiter, and can be considered the true leader of the Monster Association.

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• Actually a Doombot: The monster form she appears as is actually just a remote-controlled body.
• Adaptational Badass: In the manga, combining with Orochi's Heart Element that allowed for an One-Winged Angel form with increased power caused by absorbing other monsters resulting in the battle to turn, and Tatsumaki to be seriously injured for the first time. In the webcomic, Tatsumaki's injuries came from Psykos' sneak attack that renders her psychic powers unstable. ^Note Of which Murata states it was too far-fetched, and that Orochi is meant to fix this in manga.
• The Assimilator: Tries to take over Orochi’s body with her mind in control during her fight with Tatsumaki, but while it achieves an One-Winged Angel form, both personalities constantly struggle for dominance.
• Bad Boss: As the one who comes up with all the Monster Association's plans Gyoro Gyoro is the one who interacts directly with all the monster underlings and thinks nothing of sacrificing the weaker ones just to gather intel on the Heroes. He'll also casually feed any monster that flees in the face of a losing fight, or who are reluctant to risk themselves, to Orochi; giving them the choice of possible death by Hero or definite death by the Monster King.
• Berserk Button: Calling her an idiot and insulting her for relying on power-ups from beings such as Orochi and God to get anywhere.
• Big Bad: She formed the Monster Association to wipe out humanity, turned Orochi into what he is today, and maintains just enough control over their merged form during their final showdown with Tatsumaki to avoid him devouring and assimilating her whole… though as Orochi reveals, she never had nearly as much control over him as she expected, nor is she safe from him even when she thinks she has control over their fused state.
• Big Bad Ensemble: She and Orochi form this with Garou.
• Big Bad Wannabe: At least, Tatsumaki sees her like this, pointing out that she has to rely on her "pet", Orochi (who was using her all along for his own benefit), as well as a power boost from "God" to gain any sort of advantage over Tatsumaki. She also notes that "God" is clearly using her as a tool and in the end, she shouldn't expect anyone to come to save her when she needs it. In the end, she runs away with her tail between her legs while Orochi is (mostly) destroyed and Garou takes center stage, and shortly after Garou is defeated, Fubuki defeats her on her own.
  • Likewise, Fubuki manages to defeat her all on her own in the webcomic and she is quickly brushed aside when Awakened Garou appears.
• Blasphemous Boast: Psykos refers to herself (as Psykorochi) as a "star-like perfect being" who might even be able to become one with Earth and assimilate all life in existence. Given that the webcomic shows that the Monster Association will inevitably lose, she couldn't be more wrong about her claims of perfection.
• Boomerang Bigot: She hates humanity, seeing them as the actual monsters, but she is a human. Though given that she invited Fubuki in the past to join her in killing all those inferior humans, she doesn't really consider humans to be the same level as her and other supernaturals.
• The Chessmaster: As the brains behind the Monster Association, he is the one who comes up with all their plans from picking the best individual matches that favor the monsters against specific Heroes, to their larger strategy of kidnapping the son of an important investor while they initially rampaged to insure the Hero Association would have to act on the monster's terms. He also sent Evil Eye and Rhino Wrestler with hundreds of other monsters to get slaughtered by the Heroes' rescue party to best observe them and set the matchups for the Dragon-level monsters.
• The Corrupter: She's the one behind the Monster Cells and the creation of Orochi.
• Curb-Stomp Battle: She has absolutely zero chance of defeating Tatsumaki on her own. Once she and Orochi merge, however, they start turning this around until Tatsumaki reveals that she was holding back to avoid harming Tareo.
• Cute Monster Girl: Her Fusion Dance with Orochi results in Psykos becoming this - at least, her upper half (when Orochi isn't taking it over).
• Demoted to Dragon: In the manga, he doesn't seem to be the leader of the Monster Association but The Dragon to Orochi... But then he reveals that she made Orochi into what he is, so in essence, he's still the true brains of the organization, just not the public face anymore.
• Devour the Dragon: A weird case in that Psykos and Orochi both clearly consider the other to be the "Dragon" in question. Psykos is the one to initiate the Fusion Dance with Orochi fully convinced she can overpower his will, only to be shocked by just how strong it actually proves to be. The result is the two of them still fighting for dominance even as they focus on destroying their enemies.
• Disney Death: Looks to die in her fight with Fubuki both in-universe and out but is later seen in a specially made prison inside the Hero Association.
• The Dragon: To King Orochi (Publicly, at least).
• Dragon-in-Chief: Despite Psykos being second-in-command in the manga, she is the one who transformed Orochi into the monster king he is today.
• Dude, Where's My Respect?: She loses it when Tatsumaki insults her for relying on Orochi and power from "God", despite how insanely strong she has become due to it.
• Evil Former Friend: To Fubuki. Although they both were evil in the past. Fubuki grew out of it.
• Evil Mentor: He sees Garou is on the road toward becoming a monster and wants to help him complete the monsterification.
• Evil Versus Oblivion: She was the Oblivion in the past back when she and Fubuki were co-villains. When Psykos wanted to change their club's goal from Take Over the World to Kill All Humans, Fubuki was opposed because then there'd be no one left for Fubuki to look down on. The disagreement quickly became violent.
• Extra Eyes: Opens up several more eyes all over his monster body during his fight with Tatsumaki.
• FanService: Not her monster form, but her true, human side form. Especially when she gets promptly bigger thanks to mixture.
• Fan Disservice: Her Fusion Dance with Orochi allows her to assume a giant Cute Monster Girl form when she manages to force her personality to the forefront, but she's still attached to a monstrous Eldritch Abomination and that sexy form has a habit of deteriorating into a mass of tumor-like flesh growths as the two personalities struggle for dominance.

• The Force Is Strong with This One: He senses a huge potential in Garou, and this raises his interest in him. Too bad for her, Garou is developing much faster than she expects.
• From Bad to Worse: She was already a villain at merely 17 years old, having planned to Take Over the World, but she didn’t truly become a dangerous Omnicidal Maniac until some future vision God transferred into her mind caused her to Go Mad from the Revelation.
• Fusion Dance: The result of Orochi's and Psykos's battle for control over the other results in a massive winged moth-like entity, with both personalities still clashing in the hopes of overpowering the other. This fusion ends up dealing serious damage to Tatsumaki, although admittedly she was holding back her true strength so as not to endanger innocents.
• A God Am I: Played with. After her deal with God, she still sees the latter as a superior being, while she (as half of Psykorochi) is enforcing its will as its last representative, however, she still refers to herself as a star-like perfect being who may be able to become the Earth itself.
• Go Mad from the Revelation: Attempting to prove herself over Fubuki in her human days, she trained herself to look into the future. Whatever she saw there made her lose her mind, convinced that humanity deserved to be exterminated.
• Gravity Master: Tries to flatten Tatsumaki by increasing the gravity around her to 300x normal. Tatsumaki just casually uses her own power to negate it.
• Humans Are the Real Monsters: What she believes.
• Hypocrite: She despises humanity, turned several people into monsters, and leads an organization composed of monsters, but she never turned herself into one until forced to the Godzilla Threshold fighting Tatsumaki. Although as a super-powered psychic, she does already consider herself above human.
• Inconsistent Spelling: In the Viz translation her name is spelled "Psychos" instead.
• Inferiority Superiority Complex: She seems to have retained this from her days in high school, feeling as though she was never given the acknowledgment she deserves by Club President Fubuki. When Fubuki's older sister Tatsumaki insults Psykos (as half of Psykorochi) for relying on beings such as Orochi, Psykos flies into a rage that nobody will acknowledge her, even after all the power she's gained now.
• Kill All Humans: Her goal after seeing something from the future.
• The Leader: He coordinates the other monsters. Double Subverted in the manga, as at first, she seems to be The Dragon and probably The Strategist, but the fact that she made Orochi into the Monster King implies she's still in charge, just not public about it. Then Orochi reveals that he was never brainwashed by her…
• Lipstick Lesbian: Heavily implied to be one. During their highschool days, Fubuki kissed Psykos under a tree. However genuine feelings on Fubuki's part is more ambiguous, as that was the moment Fubuki sealed Psykos's powers when she realized she was about to surpass here. On the other hand, considering Fubuki seduced and kissed her to get her guard down, it still means Psykos has romantic feelings for Fubuki for it to work.
• Male Gaze: A lot of panels are dedicated to admiring her true form.
• Mind over Matter: He has telekinesis on a level that can be described as stronger than Fubuki, but weaker than Tatsumaki.
• Mission Control: Uses his mind powers to talk with the other monsters and coordinate.
• Ms. Fanservice: Her true body is actually quite attractive in contrast to her monster puppet. The manga also seems fond of putting her in poses that emphasized her figure. Even her One-Winged Angel Fusion Dance with Orochi still manages to be pretty sexy when she's the one with the majority of control, appearing completely nude in this form (albeit with Barbie Doll Anatomy).
• Nightmare Face: The look he develops every time he discusses evolution.
• Oh, Crap!:
  • When she sends out a drone to find Gouketsu, wondering what's keeping him from arriving back at the Association, only to find his corpse, missing his head and a good chunk of his upper torso (courtesy of Saitama). Considering how powerful he was, she is right to be rather concerned about this development.
  • Get's three consecutive Oh, Crap! when she first meets Tatsumaki in the monster Headquarters. The first because Tatsumaki is much, much stronger than Psykos anticipated, the second because Tatsumaki knows Gyoro Gyoro is just a remotely controlled meat puppet and the third when (the brainwashed by her into absolute obedience) Orochi doesn't heed her call for help, so she (correctly) assumes that Orochi has engaged an enemy so dangerous that he has no opportunity to save her.
  • She gets yet another one when Orochi returns but reveals that he has no intention of obeying her and begins to consume her whole. She manages to fight back, resulting in a Fusion Dance that makes them Sharing a Body.
  • Another one still when has her first encounter with the being known only as "God".
  • An even worse one when Tatsumaki visits her in prison, looking to settle the score. It's so bad that she faints on the spot.
• One-Winged Angel: Her fusion with Orochi results in a massive winged moth-like beast with twin blades, with Psykos's upper half emerging out of the head, now much larger than her normal size, although neither villain is completely in control and are still battling for dominance over each other.
• Playing with Syringes: Although he didn't actually use syringes, she experimented on countless humans to find a way to transform them into monsters.
• Psychic Powers: Has the standard telekinesis of every psychic in the series, but also displays a fair amount of telepathy as well. And in the webcomic, it’s revealed Psykos was also able to look into the future, and what she saw helped to motivate her Kill All Humans plan.
• Punny Name: Her true name, Psykos, obviously sounding like a play on psychic. There’s also some bonus points given after the reveal of her backstory though, as she went “psychotic” after seeing something horrible in the future of humanity.
• Samus Is a Girl: In reality, she's a human esper remotely controlling a monstrous body. Black Sperm remarks on her human form that he never expected that she was a girl.
• Screw This, I'm Outta Here: She completely forgets about trying to maintain control over Orochi and books it when the other heroes start ganging up on them.
• Sharing a Body: The Fusion Dance between Orochi and Psykos has them retraining their personalities and the two battle for control of the body while simultaneously trying to defeat Tatsumaki. Psykos wishes to enforce the will of God and become one with Earth itself, however her clashing with Orochi and Tatsumaki’s team puts this plan in a difficult spot.
• The Strategist: He plans the matchups by the monsters against heroes during the invasion, allowing monsters to deal with heroes normally above their level.
• Super Serum: When Tatsumaki finds Psykos' true body and forces her out to a confrontation, Psykos drinks a mysterious liquid that boosts her esper powers when she realizes none of her monsters are responding to her mental calls. This allows her to put up a better fight against Tatsumaki, though it's not long before the S-Class Hero overpowers her.
• Team Killer: Kills more than a few monsters during her battle with Tatsumaki and feeds few of them to Orochi.
• Took a Level in Badass: Psykos was much weaker during her school days, capable of lifting only a person at best while Fubuki could lift a truck. By the present day, Psykos has increased her raw power by so much that she's a Dragon-level threat, and much stronger than Fubuki to boot.
• Underestimating Badassery: Seriously underestimated Tatsumaki, much to his later horror. Ditto with Fubuki later. In the manga, he also decides to try and accelerate Garou's transformation into a powerful Monster by sending stronger members of the Association against him, but he clearly underestimates his own drive and goals.
• Unskilled, but Strong: Ends up being so in the webcomic vs. Fubuki, as even though her psychic powers are more powerful, Fubuki can defeat her through superior psychic technique. Subverted in the manga, where she displays several unique techniques compared to the other psychics in the series, and even manages to turn Tatsumaki’s power against her after fusing with Orochi.
• Unwitting Pawn: It's implied that Orochi was merely letting her think she had control over him while allowing her to feed him monsters to power him up. He later confirms that she will be next in line. She does get credit for managing to hold him off for the time being.
  • She also serves as one to God, who makes Psykorochi into its representative and will when Psykos accepts its orders without even thinking, knowing that she will gain new power beyond all that she'd had before.
• Voice with an Internet Connection: Though not as powerful as Tatsumaki, it is shown that Gyoro Gyoro is powerful enough to send out a psychic signal to his colleagues from over great distances, as well as remotely control a "Meat Puppet" from several hundred meters underground.
• Walking Spoiler: You think?
• We Can Rule Together: Gives Garou the chance to join her to defeat the heroes. He refuses.
• We Used to Be Friends: With Fubuki.
• Younger Than They Look: Having been in school together, she’s roughly only about the same age as Fubuki- just 23 or so- but cultivates a more sophisticated appearance about her and manages to look more mature and composed than Fubuki. Fitting, considering how far she has surpassed Fubuki in power since having formerly been weaker than her.

SPOILERS

Psykorochi

An entity created when Orochi tries to absorb Psykos and the latter usurps him from within, causing the two monsters to become a powerful being with dueling minds. Despite their quarreling, it is a fearsome beast that nearly rivals Tatsumaki in strength.

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• Ambiguous Gender: As the two components of the fusion are a man-turned-monster and a human woman, it's hard to say which gender Psykorochi falls under, at least before one of them successfully absorbs the other as the dominant personality. Psykos briefly prevails and asserts control after a brush with "God", although there are several moments in their fight with Tatsumaki where Orochi's will threatens to overpower her own as shown by her face deforming to resemble his and the fusion's voice changing and becoming monstrous.
• The Assimilator: It still secretes Orochi’s flesh to continue absorbing monsters and people for more power. It’s an unsuccessful attempt to absorb Saitama (due to slipping off his bald head) gets it punched; distracting it enough that it stops attacking Tatsumaki. Then it's revealed that it wants to assimilate all life in existence.
• Attack of the 50-Foot Whatever: Takes the form of an eldritch moth-like creature that’s several stories big.
• Battle in the Center of the Mind: One is ongoing between Orochi and Psykos even as they work in tandem to control their new body, with both of them seeking to become the permanent main controller.
• Beam-O-War: Against Genos, who manages to hold the fusion off long enough for Tatsumaki to free as many remaining trapped heroes as possible before returning her attention to dealing with Psykorochi.
• Big "YES!": Orochi lets one out when Psykos notes that Tatsumaki is reaching her limit due to having suffered major injuries and having exhausted her abilities by tearing apart the city to destroy the Fusion Dance.
• Bioluminescence Is Cool: Has several glowing tendrils to indicate it’s psychic power thanks to Psykos.
• Blade Below the Shoulder: It has two very long blades on two of its hands.
• Body Motifs: Psykorochi is based on neurons, as shown here.
• Cool Plane: They transform into a fighter jet to put distance between themselves and Tatsumaki's attacks. Yes, you read that right. A fighter jet. They then get into a dogfight with Drive Knight who can also turn himself into a mechanical fighter jet.
• Demoted to Dragon: In a very odd way, given that it considers itself to be the will of "God" and its representative in wiping out and assimilating all life, yet "God" itself has never personally appeared to anyone else in the Association other than Homeless Emperor.
• Devour the Dragon: A weird case in that Psykos and Orochi both clearly consider the other to be the "Dragon" in question. Orochi interrupts the duel between Psykos and Tatsumaki intent on devouring the former to restore his body and power to greater heights, even feigning some level of weakness so that Psykos comes to Orochi first with her intent to usurp his power before surprising her. However, Psykos' will prove too strong for him to subsume completely. The resulting monstrosity has the two of them still fighting for dominance even as they focus on destroying their enemies.
• Fusion Dance: Because neither side is willing to just be absorbed by the other, it instead becomes this, and it's very volatile.
• Gaia's Vengeance: Claims that its mission is to assimilate all life as the will of God and fate, and wonders if it can become the planet itself to accomplish this.
• Genius Loci: Not yet, but Psykorochi is definitely pondering whether it has to power to become the Earth itself before going beyond even that.
• A God Am I: Played with. After Psykos meets with God, she still sees the latter as a superior being, while she (as half of Psykorochi) is enforcing its will as its last representative, however, she still refers to herself as a star-like perfect being who may be able to become the Earth itself.
• Mouth of Sauron: Psykorochi states that it serves as the representative and will of a higher power believed by Psykos to be "God".
• Impaled with Extreme Prejudice: Orochi's part of the fusion ends up stabbing Tatsumaki's hands with his blades and hoisting her up to deal the finishing blow, but Genos manages to provide her with some much-needed assistance.
• Multi-Armed and Dangerous: Has four arms, with each pair holding a massive spear-like weapon.
• Old-School Dogfight: Drive Knight invokes this by chasing their fighter jet form down in his Flying Chariot mode, intent on obtaining a piece of them to use as a sample.
• One-Winged Angel: Their fusion results in a massive winged moth-like beast with twin blades, with Psykos's upper half emerging out of the head, now much larger than her normal size, although neither villain is completely in control and are still battling for dominance over each other.
• Psychic Powers: Psykos' already-considerable esper abilities (though it's nowhere near enough to match Tatsumaki's) are enhanced thanks to the fusion, to the point she can actually overpower and subvert Tatsumaki's own powers (although Tatsumaki is still somewhat holding back due to not wanting Tareo to get caught up in her attacks) when previously no other opponent had ever come close.
• Sharing a Body: The Fusion Dance between Orochi and Psykos has them retraining their personalities and the two battle for control of the body while simultaneously trying to defeat Tatsumaki. Orochi has an ulterior motive - he wants to absorb Saitama to complete his revival and become the most powerful being in existence.
• Teeth-Clenched Teamwork: Make no mistake, both are still fighting for full control over the other half of the fusion even as they attempt to destroy the heroes and the Earth.
• Took a Level in Badass: As a Fusion Dance, Psykos was able to amplify her psychic power with Orochi as the power source so that it can match Tatsumaki's, and this likely applies to Orochi too due to God's interference during its formation.
• Unholy Matrimony: To a disturbing degree, when they start to join bodies, the union is very... suggestive and comes across as two abusive lovers trying to take advantage of each other.
• Unskilled, but Strong: She's a lot closer to Tatsumaki in raw power but still weaker in the end as Tatsumaki restrains her before wringing all of Z-City dry of her roots. In terms of battle tactics though, she has no strategy besides "firing giant laser at my enemies." Tatsumaki easily gets the better of her by using decoys and smokescreens as a distraction before infiltrating her body by identifying how the fusion absorbs power through their roots.
• Unwitting Pawn: Implied by Tatsumaki that, due to Psykos not thinking any of it through and remembering that espers have always been used and abused by others, the creature known as "God", who makes Psykorochi into its representative and will when Psykos accepts its orders, is using Psykorochi as a mere pawn.
• Voluntary Shapeshifting: They transform into a fighter jet to gain distance from Tatsumaki's attacks.
• Wave-Motion Gun: Fires one at Tatsumaki that's so huge and powerful it separates part of the ocean off in a shot that can be seen from space before it crashes back into Earth and unleashes a tsunami. Their brief Beam-O-War with Genos shows that it has enough power to easily destroy giant meteors (as his newest upgrade per Genos' own words could destroy meteors, and he barely managed to hold Psykorochi's attack back).

Dragon-Level Members (Executives)

Executive Members (in general)

Dragon-level monsters and the elites of the Monster Association. Each one of them is extremely powerful, more than enough to overwhelm an S-Class hero in single combat.

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• Arc Villain: Once MA's base collapses, they get much more focus later in Monster Executives arc.
• Big Bad Ensemble: They're this with Garou, once the Monster Association collapses and battle takes over to the surface.
• Enemy Civil War: In the manga they are much worse at teamwork, and even begin attacking each other in the midst of their battle with the S-Class.
• Person of Mass Destruction: As a threat capable of harming entire cities, this is a given. Each of them are extremely powerful and provide major threat to even best S-Class Heroes.
• Sorting Algorithm of Evil: They show up once all the Demon-level monsters are killed off, and are far more powerful. Though not as much as Monster Garou.
• Teeth-Clenched Teamwork: They don't get along and even those who share, although rather downplayed, Villainous Friendship fight each other during battling S-Class Heroes.
• Wolfpack Boss: In the webcomic they team up against Tatsumaki, who is powerful enough to handle all of them on her own. They still beat her though, because one of them knows exactly how to fight psychics.

Black Sperm

Black Sperm

Voiced by: Yuichiro Umehara (Japanese), Jalen K. Cassell (English)

Debut: Chapter 58 (Webcomic), Chapter 79 (Manga), Episode 22 (Anime)

Disaster Level: Dragon

One of the Monster Association's most powerful members, a gestalt entity composed of sentient cells who can split and recombine as needed. His origins and motives are a mystery, but look down on him at your own peril.

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• Adaptational Badass: Already one of the strongest Monster Association member to begin with, the manga increases his cell stock from 11 trillion to 54 trillion and allows him to access an even more powerful Super Mode in Platinum Sperm.
• The Assimilator: Golden Sperm, a permanent fusion of 10 trillion cells (or 43 trillion cells in the manga) with one consciousness, demanded the remaining 100 Black Sperm cells be absorbed as well since they no longer had a reason to exist with him around.
• Art Evolution: Golden Sperm looks much more muscular in the manga than webcomic, instead of looking mostly identical to the usual Black Sperm unit.
• Art Shift: Usually depicted in a simplistic style evocative of ONE's webcomic, but gets terrifyingly detailed close-ups when he's especially angry.
• Asteroids Monster: In his form as an undifferentiated mass, cutting him to pieces just creates more bodies for him. This is a real problem for Atomic Samurai, whose only tactic is cutting things to pieces. Even when Atomic Samurai catches Black Sperm off-guard by revealing he's developed a concentrated slash attack that wipes the target out down to the cellular level and destroys multiple bodies with it, Black Sperm simply hides and waits for Atomic Samurai to think he's wiped out all his bodies before launching a surprise attack.
• Atrocious Alias: It's hard to take a guy seriously when his supervillain name makes him sound like some kind of monster from a genre of manga/anime this wiki no longer talks about.
• Berserk Button: He seems to really hate being underestimated.
• Beware the Silly Ones: He looks like a guy wearing a latex suit with an antenna and he has an Atrocious Alias, yet he is very much a legitimate threat. He beats down on Atomic Samurai without remorse in his normal form, even when Atomic Samurai reveals he can permanently end him. As Golden Sperm, he briefly managed to hold his own against Evolved Garou and is in fact considered the second strongest member of the Monster Association after Orochi himself. Murata has stated that, in terms of raw power, he actually isn't sure which one of the two is stronger, although Orochi is a more skilled fighter.
• Big Bad Wannabe: He clearly wanted to be the world’s greatest threat himself, and was a threat to the other S-Class Heroes except for Tatsumaki. The esper was easily beating him up until he formed into Golden Sperm. However, even then Garou still proves himself the superior threat and ONE stated that Tatsumaki would have defeated him if she wasn't injured. In the manga, Platinum Sperm takes Golden Sperm's place in his fight with Garou, and other than being fast enough to clash with Garou and outspeed Flashy Flash, the outcome still had Garou winning by obliterating him simply from “passing through” at insane speeds.
• Bishōnen Line: The Manga reveals his true final form; Platinum Sperm, which is a combination of Golden Sperm and over 11 trillion other cells. While still very muscular and tall, it's much leaner than his Golden Sperm form, and looks quite a bit like Freeza's final form.
• Black Eyes of Crazy: Black eyes and certainly off his rocker.
• Catchphrase: "Are you looking down on me?"
• Clipped-Wing Angel: Multi-Cell Sperm. He can't stand up to Tatsumaki at all despite being comprised of over one trillion cells, and his death reveals a crucial shortcoming in the cells' Fusion Dance: that they lose their ability to split apart.
• Conveniently Timed Distraction: In the manga, his fusion of one hundred cells fights Metal Bat for a short time, and manages to dodge several swings from him. Metal Bat only scores a hit after the fusion is distracted by watching the birth of his strongest form Platinum Sperm with sorrow and joy.
• Dub Name Change: In the Viz translation, he is called "Black Spermatozoon", possibly to sound less lewd.
• Enemy Mine: He smugly suggests this with Garou in their fight with Flashy Flash, but Garou is disgusted by this, punching Platinum Sperm instead.
• Entertainingly Wrong: Because he witnessed Saitama spare Garou's life even against the wishes of the other heroes, he makes the understandable conclusion that Saitama must have a vow not to kill. Accordingly, he decides it's a good idea to stick with Saitama and follows him home. What he doesn't know is that Saitama only spared Garou because he realized he was actually still human, and he has and will very quickly kill any actual monsters he comes across. Luckily for Black Sperm though, Saitama is so dense that he fails to realize he's a monster anyway.
• Flash Step: Can move deceptively quickly.
• Foil: He's a dark reflection of Saitama, in many ways. Both are unassuming, weird-looking beings who actually possess incredible abilities. Both are often underestimated by their opponents - while Saitama isn't too purturbed by it, Black Sperm absolutely despises it. Saitama is the Hero Association's secret weapon, but nobody knows because he doesn't boast about his strength - Black Sperm is one of the most powerful monsters in the Monster Association and is aware of his status as a trump card.
• For the Evulz: Seems to be his motivation, and doesn't have much of a goal, unlike a few other monsters in association.
• Fusion Dance: Apparently comes in two varieties. One is for multiple cells to merely form the same body while retaining their individuality and the other is for the cells to merge permanently, forcing all but one to basically disappear into nothingness.
• Golden Super Mode: Golden Sperm mode. Requires at least ten trillion cells (43 trillion cells in the manga) to create. This form vastly increases its powers and can defeat an injured Tatsumaki and was able to temporarily fight with evolved Garou.
• Hive Mind: A monster with well over eleven trillion bodies to spare. Fortunately, those bodies are nearly microscopic.
• Hyper-Awareness: One of his greatest strengths is the ability to analyze an opponent's abilities and strategies accurately.
• Hypocritical Humour: Somewhat subtle version as it's drawn out over time after his initial anger over being looked down on and Black Sperm having a rather serious (and terrifying) demeanor while doing it. Black Sperm proclaims that he despises being looked down on, yet afterwards he does this to his opponents constantly both with his mocking insults, smug facial expressions, and his poses, where several of his copies will be lying down resting or apparently dancing in the middle of the fight.
• Irony: During Platinum Sperm's fight with Flashy Flash and Garou, his role is swapped with Garou's, with Platinum Sperm testing the heroes' ideals and getting disappointed when it doesn't live up to his expectations, while Garou passes through Platinum Sperm while cockily stating "allow me to pass through" to destroy him, the line Platinum Sperm used against the two to showcase his power. Doubles as Death by Irony for the latter case.
• Lightning Bruiser: He's faster than Genos can keep up with, powerful enough to heavily injure Atomic Samurai with just one punch, and near-immortal with 11 trillion (54 trillion in the manga) backup bodies to make up for his lack of durability.
  • Golden Sperm takes this up a notch compared to regular Black Sperm. Sweet Mask notes that Golden Sperm could take on and beat all the S-Class heroes sans Tatsumaki (and Flashy Flash, who was not present at the time) by himself just because he's so fast they can't even see him move. In the manga, Golden Sperm managed to knock out Superalloy Blackluster with only one punch.
  • In the manga, Platinum Sperm defeats Zombieman, Puri Puri Prisoner, Iaian, and a weakened Atomic Samurai instantly with one blow and then fighting Flashy Flash and Monster Garou at speeds so intense that the S-Class heroes and Evil Natural Water can't even see them. Naturally, they assume that King destroyed Platinum Sperm with his ultimate move, and the destruction wrought by the Mêlée à Trois is the result of King's attack. Platinum Sperm is later revealed to outclass Flashy Flash and later speeds up even more against Monster Garou.
• Me's a Crowd: Splits into other cells.
• No-Sell:
  • Against an injured Tatsumaki as Golden Sperm in the webcomic, who tries to use her powers to snap his neck. He just holds his head in its default position.
  • In the manga, he completely immune to Vomited Fuhrer Ugly's Acid Attack, as his body takes on gold's non-corrosive properties and thus it does nothing.
• Not-So-Harmless Villain: He might look like a rejected teletubby, but he is one of the Association's strongest members.
• One to Million to One: Black Sperm can literally regenerate From a Single Cell and can successfully separate into trillions of clones. He also carries the ability to re-fuse and, if he does so after cloning himself enough, combines into Golden Sperm, and in the manga, Platinum Sperm.
• One-Winged Angel: The Golden Sperm mode. He becomes powerful enough to no-sell Tatsumaki's attack and trashes her with no effort, while in the manga, he beats Vomited Fuhrer Ugly and Superalloy Blackluster to a pulp with only a few blows. The manga gives him an even more powerful mode, Platinum Sperm, which is capable of casually defeating Flashy Flash and fight Monster Garou in an equal footing.
• Power at a Price: Merged cells like Multi-Cell Sperm and Golden Sperm are a lot more powerful but they lose their ability to split, meaning that unlike the regular cluster cells they can be killed by being torn apart.
• "The Reason You Suck" Speech: He gives one to Blackluster (as Golden Sperm) and Flash (as Platinum Sperm) for being more concerned with protecting their pride in their abilities than actually doing their jobs as heroes once they've been pushed into a corner. He caps it off saying that an Ideal Hero that protects the weak does not exist, not unlike Garou. And like Garou, this is obviously wrong, considering heroes in series like Mumen Rider.
• Retired Monster: Serves as one in Neo Heroes Saga, where he's taking a break from his monster activity for him to regenerate and kill remaining humans, when the Hero Association, Neo Heroes and unknown robots will wipe out each other.
• Smug Super: While he's normally possessing an Inferiority Superiority Complex, as Golden Sperm and Platinum Sperm his confidence becomes justified and even more obvious, with just about every line being about how awesome he is and how his opponents suck as he beats them to near-death.
• Sleep-Mode Size: In the webcomic, after his Golden Sperm mode and the fusion of one hundred cells was defeated by Monster Garou, he was left with what seems to be just one copy of himself remaining and is as large as a similarly weakened Rover, to the point where he can be mistaken for an animal. The manga had the fusion of one hundred cells being beaten by Metal Bat instead, but currently it's unknown what happened to the remainder of it.
• Sole Survivor: With Rover, he's one of the only Executives to still be alive, albeit in very much weakened state.
• Transformation Is a Free Action: Averted for his Fusion Dance forms. The reason he's able to complete the fusion into Golden Sperm is because Vomited Fuher Ugly let him while completely looking down on him and the heroes were too busy fighting other Black Sperm copies to interrupt him, which he made sure to confirm before transforming.
• Tiny-Headed Behemoth: The way his Golden Sperm mode is depicted in the manga, a humanoid with a relatively normal sized head and a gigantic, immensely muscular body that puts even Superalloy Blackluster's to shame.
• The Worf Effect: His Golden form was trashed by Garou in the webcomic. And this happens right after he blitzed Tatsumaki (though Word of God said she would've won at full power). The manga had Platinum form taking his Golden form's place, which Garou outspeeds and shatters like glass.
• Villainous Breakdown: A small one, but after exchanging numerous blows with Garou, the normally Smug Super Platinum Sperm ends up injured and loses his composure, only able to furiously call out Garou's name before Garou finishes him off.
• Villainous Friendship: Severly downplayed, but he and Homeless Emperor are the only cadres that somehow get along, as Golden Sperm saves him from Atomic Samurai's attack. Gums and Fuhrer Ugly could count if not for Fuhrer ripping Gums in half while the latter bisected him in the manga.
• Vocal Dissonance: He has a surprisingly deep voice for such a small and strange-looking monster. It becomes much more fitting for his stronger forms, though.
• Would Hurt a Child: He appears to care little for the lives of humans as he was about to kill the child kidnapped by the Monster Association without remorse. In fact, he actually calls to the child so he can kill him, with the same casual manner of a man asking for directions.
• Zerg Rush: He can throw many cells at someone as a distraction. Taken up to notch in his Sperm Tsunami ability.

Overgrown Rover

Overgrown Rover

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

Disaster Level: Dragon

The giant guard dog of the Monster Association, and easily one of their most powerful members. While he may be a nigh-indestructible killer, he is still a loyal pooch at heart.

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• Angry Guard Dog: Rover's role is to roam the corridors of the Monster Association's HQ and deal with any threat. Despite this very basic role, it is considered to be a cadre within the association for its sheer strength.
• Breath Weapon: Attacks by firing many destructive blasts from his mouth.
  • The blasts are so devastating that they destroyed a large portion of the Monster Association's base and even caused shockwaves and tremors in the city above it.
• Brought Down to Normal: After the collapse of the Monster Association with the underground base literally falling atop of him. Rover has shrunk down considerably to a more manageable size.
• Dub Name Change: Referred to as "Overgrown Pochi" in Viz translations, which is more literal to his Japanese name.
• Fluffy the Terrible: After shrinking down, he looks almost adorable enough to eat. One would never suspect him of once being a titanic super beast capable of leveling city blocks. Saitama even considers keeping him as a pet at his new pad in Hero HQ.
• Hell Is That Noise: When one of the monsters attacks him by accident, a very furious sound of pain can be heard from him.
• Non-Malicious Monster: His behavior suggests that he's not really evil, just trained to be aggressive to all intruders. Once the Monster Association is gone and Rover shrunk down, he acts just like any other friendly dog.
  • He lets Garou and Tareo go after they slowly backed away, only attacking when Garou accidentally hit him with a deflected monster blow.
• Pint-Sized Powerhouse: Even after being shrunken down to a much smaller size, he was still more than capable of firing an energy blast that could kill a large monster who gave the Blizzard Group trouble with a single shot.
• Screw This, I'm Out of Here!: After waking up from Saitama's punch, he takes one look at the hero confronting Orochi, turns tail, and runs.
• Sleep-Mode Size: After taking much damage he was shrunk down to a normal, albeit still monstrous looking, size.
• Sole Survivor: With Black Sperm, he's one of the only Executives to still be alive, albeit in very much weakened state.
• Super-Toughness: And how! Was unfazed from unawakened Garou's best attack. He even resisted Saitama's legendary Death Blow (although it was because Saitama was treating him as merely a huge dog and wasn't trying to kill him) and remained strong enough to take on three individuals equal to S-Class in strength with ease. That being all said, as much as he can take, each time he gets a bit smaller, eventually becoming a dog-sized monster.
  • For context, fellow Dragon-level member Centichoro was hit by Bang and Bomb's Roaring Aura Sky Ripping Fist, which shattered its famously durable carapace. Overgrown Rover was hit by their Cross Dragon Slayer Fist, which is said to be even more powerful, but all it did was just annoy the dog.
• Team Killer: Kills a trio of Demon-level monsters and a few tiger ones during his attack on Garou.
• Weaksauce Weakness: As crazy powerful as he is, he's still a dog. Just telling him to sit is enough to calm him down and let you pass through.

Homeless Emperor

Homeless Emperor

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

A misanthropic and genocidal man who seeks the destruction of all humanity. He was saved from suicide by a being he calls "God", and was given the power to create explosive orbs of light to achieve his goal.

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• Badass Armfold: He is introduced in the manga with this pose, gathering with other Dragon-level monsters and completely confident in his ability to fight the S-Class Heroes.
• Badass Boast: "I alone am more than enough to defeat all heroes."
• Badass Cape: Downplayed. He has a cape but it looks like a big rag he's tied around his neck.
• Beard of Evil: To give off the hobo theme, and he's a monster (mentally).
• Combat Pragmatist: Sneaks up on Zombieman to attack him from behind.
• Cool Crown: Homeless Emperor sports a small plain crown on his head.
• Cruel and Unusual Death: God straight-up melts him before he can properly divulge anything regarding the former.
• Dark Messiah: Homeless Emperor has a messiah complex, believing it is his duty to exterminate humanity to save the planet and bring balance to nature.
• Expy: Possibly to Weather Wizard from DC Comics.
• Freudian Excuse: He was humiliated when he first started working, by being forced to dance naked in front of the staff and was fired shortly after for sexual harrassment at that, which made him conclude all humans are evil and should die.
• Glass Cannon: Even though he's decently fast and possesses a hugely destructive power, Homeless Emperor is not suited for close quarters combat since his body is that of a regular person. He also isn't immune to his own energy spheres.
• Hero Killer: Kills Zombieman A LOT of times before his defeat. And also attacks S-Class Heroes multiple times on the surface battle.
• Ironic Name: The titles "homeless" and "emperor" are basically complete opposites. The name likely means that while he has all this power, mankind still sees him as a vagrant.
• Kill All Humans: His main goal because he believes that all Humans Are Bastards. And his fellow monsters too, once the first goal will be achieved.
• Light 'em Up: He can summon energy spheres which are similar to miniature suns capable of great destruction. These spheres explode upon contact. He is also shown to be able to use the energy and blast it from his fingertips.
• Looks Like Jesus: Has shaggy long hair and unkempt beard that's reminiscent to the typical portrayal of Jesus. Quite a fitting appearance for a Dark Messiah who claims to be on a Mission from God.
• Misanthrope Supreme: Hates humanity with a passion and wants them all to die despite being a human himself.
• Required Secondary Powers: Subverted, he is not immune to his own energy spheres which is why he can't blast away Zombieman (who managed to put him in a chokehold) without hurting himself.
• Shoot the Bullet: He's able to move his destructive spheres around to destroy the bullets shot at him during his fight with Zombieman.
• Squishy Wizard: Despite his endless energy spheres, Homeless Emperor only has a normal human body.
• The Hermit: Temporarily one until he got his powers.
• Token Human: He's not actually a monster, but rather a human with the mentality of one who was later blessed with supernatural powers.
• Token Wizard: The only one in Executives and pretty much entire Assocation.
• Touched by Vorlons: He acquired his light powers by meeting with a mysterious being who he believes to be "God" and who seemingly gave him the mission to eradicate humanity.
• Villainous Friendship: Severly downplayed, but he and Black Sperm are the only cadres that somehow get along, as Golden Sperm saves him from Atomic Samurai's attack. Gums and Fuhrer Ugly could count if not for Fuhrer ripping Gums in half while the latter bisected him in the manga.
• You Have Outlived Your Usefulness: He gets immolated by "God" after he gets caught by Zombieman, and starts to be interrogated; presumably to keep him from giving away any more information.

Fuhrer Ugly

Fuhrer Ugly

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

Disaster Level: Dragon

A powerful Ugmon, meaning an ugly man who was mutated into a monster by his own festering self-hatred and envy of the good-looking. He is a brutal combatant, and uses a disfiguring fighting style to crush his enemies - especially the beautiful ones.

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• Acid Attack: After being bathed in Gums' stomach acids, Fuhrer Ugly can weaponize his melting body to launch acidic globs that eat through most things they touch. Victims include a few Black Sperm copies, Superalloy Blackluster, most of the Council of Swordmasters and Atomic Samurai's sword.
• Acrofatic: He's got quite a gut but he's still able to move faster than the human eye can see and perform perfect splits when kicking.
• Adaptational Badass: He gets a new Super Mode in his Vomited form in the manga, making him a harder opponent who lasted for longer time, even keeping stronger S-Classes like Superalloy Blackluster and Atomic Samurai on their toes. It takes Monster Garou's One-Hit Kill to actually defeat him.
• Asshole Victim: He's such a sadistic jerk that Garou kicking a hole through his stomach and leaving him helpless to do anything but painfully melt to death is treated as a heroic, redeeming moment. Even other cadres hated him and tried to kill him.
• Bald of Evil: Got no hair on his head and is one of the most cruel and sadistic monsters.
• Body Horror: In the manga, after escaping Gums, he melting due to being in the monsters' stomach acid, his left eye falling out of his socket.
• Break Them by Talking: According to Drive Knight, he uses insults and crude remarks to break down his enemies mentally so they will be easier to fight.
• Cruel and Unusual Death: In the manga, Garou blows a hole through him, weakening his Healing Factor enough that it can't keep up with the damage of Gums's stomach acid and leading him to melt to death.
• Combat Pragmatist: Will use any tactics he can to gain upper hand on his opponents, like scaring Sweet Mask further with mirrors everywhere that reflect his ugly face, or ripping off the mercenaries' arms in front of Tank-Top Master and Pig God.
• Death by Irony: Humiliation and self-doubt/hatred is what gave him his powers in the first place. Further humiliation makes him more powerful, and taken up a notch in his even uglier Vomited form. He likes to cause these same emotions in those he fights to spread the misery. In the webcomic and the manga, he dies in an absolutely humiliating way. He deserves every second of it.
• Dies Differently in Adaptation: Downplayed as he gets killed by someone blowing a hole through him in both mediums, but the webcomic had Bang doing it in his normal form, while the manga had Garou doing it in his Vomited form.
• Dub Name Change: In the Viz translation he's called "President Ugly", likely to avoid certain connotations.
• Dumb Muscle: He thinks he can become the new Monster King but is all strength and no finesse, and is too dumb to realize why Gyoro Gyoro didn't match him up with Bang. When Bang tells him not to fight him even after he redirected two of his punches already, he tries to punch Bang again. The result is Gums being killed (by Fuhrer Ugly ripping him open to escape after being punched into Gums's mouth) and Fuhrer Ugly being half digested. His first thought after losing so badly is to try and fight Bang again, though in this case he might've turned their potential rematch into his favor with his acidic body that can melt even Superalloy Blackluster.
• Evil Makes You Ugly: Inverted: Fuhrer Ugly was turned into a monster because he was ugly, or more specifically by his self-hatred and jealousy of good-looking people. His inferiority complex and ugliness makes him particularly hate good-looking opponents like Sweet Mask.
• Freudian Excuse: He's ugly and envious of good looking people, which made him evil. It's implied it's more of a Freundian Excuse Is No Excuse however.
• From Bad to Worse: He's already a very strong Monster Association member as one of the cadres, and when he becomes Vomited Fuhrer Ugly, pretty much nobody on either side can finish him off for good, until Monster Garou kills him.
• Gonk: Being an Ugmon, Fuhrer Ugly is an incredibly ugly man that became a monster.
• Hated by All: Even the fellow cadres can't stand him, especially in his Vomited form, when he is a Team Killer. When he gets killed by Garou, pretty much nobody sheds a tear for him. Quite frankly, this particular trope is actually what makes him so powerful.
• Healing Factor: He has a limited amount of regeneration as he was able to quickly regenerate from Bang's barrage of attacks and Genos' kick.
• Hero Killer: As Vomited Fuhrer Ugly, he's one of the few monsters to cause onscreen human death, by killing half of Council of Swordmaster with his acid, and requiring Nichirin to get a prosthetic lower body.
• I Have You Now, My Pretty: Heavily implied to be his intentions with an unconscious Tatsumaki, as he has a very depraved look on his face and wonders aloud “what kind of panties she’s wearing” as he reaches for her… but fortunately, he gets distracted by Bang attacking Gums at the last second.
• Inferiority Superiority Complex: His ugliness makes him particularly hate good-looking opponents. His jealousy and self-hatred turned him into a monster at the first place. Which is why It's Personal for him to face Sweet Mask.
• Jerkass: The most cruel and mean-spirited of the cadres, so much so it is actually part of his fighting style.
• Logical Weakness: Vomited Fuhrer Ugly both dishes out and is on the receiving end of this trope. He uses strong acid as Vomited Fuhrer Ugly, which easily dissolves Superalloy Darkshine's skin as it has better resistance to physical attacks compared to acid resistance, plus Vomited Fuhrer Ugly matching his strength blow for blow. However, when he tries the same thing against Black Sperm in his Golden Sperm form, the latter shrugs it off, with his gold skin immune to nearly all acids on top of him being stronger.
  Golden Sperm: Please refrain from spitting your filth on me. Your digestive fluids are meaningless against the anti-corrosive properties of gold. They merely disgust me.
• No-Holds-Barred Beatdown: Delivers a brutal one to Tanktop Master, so much so that Bang realizes the S-Class Hero is on the verge of death when he rescues him.
• Not-So-Harmless Villain: Pretty much played for laughs in his first fight with Amai Mask, where he is treated with much more silliness than the other cadres who nearly kill their hero opponents. After Orochi's defeat, he reveals a much more cruel and sadistic side, brutally injuring several heroes in quick succession, coinciding with an Art Evolution which makes him more outright grotesque than simply Gonk.
• One-Winged Angel: Can manipulate his cells to change into a more hideous and bigger form. Later in the manga after getting eaten by Gums, he gains an upgraded form in Vomited Fuhrer Ugly, which makes his body dangerous to just touch and now he can spit acid which is powerful enough to melt Superalloy Blackluster's skin. Due to him getting uglier (which means more self-doubt), he also becomes strong enough to Punch Parry Superalloy Blackluster. However...
• Power at a Price: Though overall more powerful, Vomited Fuhrer Ugly has some drawbacks like his constant melting and the need to consume material constantly to replenish his body as it's still melting.
• Power-Upgrading Deformation: In exchange for nearly being melted by Gums' stomach acids and looking like a Blob Monster, he's even stronger physically and can now weaponize the acid.
• Shadow Archetype: To Amai Mask. Both were ugly humans who hold a resentment due to their ostracization, but while Amai Mask later gained a good-looking form and becomes a hero who protects others, albeit a Knight Templar Anti-Hero, Fuhrer Ugly becomes uglier and wants to take it out to other people, particularly the good-looking ones.
• Super-Strength: His punches are enough to put a fight with Amai Mask and S-Class Heroes.
• Super-Toughness: He was able to brush off Genos' kick without much problem and takes several hits from Bang (though when Bang gets serious in the Webcomic, he inflicts One-Hit Kill to him). He even survived being bathed in Gums' stomach acids.
• The Power of Hate: Being an Ugmon, this is what gives him great power.
• Super-Speed: Fuhrer Ugly's speed is so fast that it even surprised Sweet Mask.
• Super-Strength: He can lift boulders. In addition, he dealt a lot of damage against a heavily injured Tatsumaki, Sweet Mask and Tank-Top Master.
• Team Killer: He kills Gums in the manga, although it's more of a self-defense one.
• Too Dumb to Live: Constantly picked a fight with Bang despite the old master showing off how useless brute strength is against him and also chooses to start fight with Black Sperm (before clearing out the remaining enemies mind you) and even pushed the fellow executives Berserk Button of being looked down on in the process. All this wound up doing is making Black Sperm decide to go Golden Sperm mode just to beat the crap out of him.
• Underestimating Badassery: To Bang. It gets him thoroughly embarrassed by the old master in a chapter-long Humiliation Conga, and in webcomic, Bang decided to get serious and inflicted One-Hit Kill to him.

Gums

Gums

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

Disaster Level: Dragon

A monster with a big mouth and an even bigger appetite. Its origins are completely unknown, but it loves snacking on heroes and monsters alike.

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• Beat Them at Their Own Game: Nearly kills Pig God the same way the S-Class Hero made a living defeating most monsters.
• Dies Differently in Adaptation: He is killed by Bang ripping him in half once he gets serious in the webcomic, and in the manga Fuhrer Ugly tears him open to escape being digested.
• Evil Counterpart: To Pig God. Both are fat beings who fight by using their mouths and eating. However, Pig God uses his power to even save other humans by holding him in his stomach without digesting them, while Gums doesn't seem to care that he have eaten Fuhrer Ugly, which is what actually kills him in the manga.
• Eyeless Face: He has no eyes.
• Fat Bastard: Basically a giant blob with a mouth attached to it.
• Flat Character: Even with Evil Natural Water, he's the executive that has the least amount of screentime or characterization and in the manga later he only serves as a power-up for Fuhrer Ugly, with him almost digesting his "comrade" in stomach.
• Half the Man He Used to Be: In the webcomic Bang rips him in half once he gets serious, and in the manga Fuhrer Ugly tears him open to escape digestion.
• Just Eat Him: Manages to eat Pig God, who fights his way back out, and later one of Genos's arms. He also eats Tanktop Master in the manga, who is only saved by the timely arrival of Bang literally tearing him out of Gums. But thanks to his tanktop, he would probably survive anyway.
• Rasputinian Death: Has a hole kicked through it by Bang to retrieve Tanktop Master, before getting its insides fried by Genos. Gums attempts ro retaliate, only to be further maimed by a massive redirected punch from Fuhrer Ugly, before being finally torn into half when it attempts to consume its fellow Cadre to heal its wounds.
• The Speechless: Says absolutely nothing.
• Stout Strength: Despite his build, he is capable of wrestling with and overpowering Pig God.
• Too Dumb to Live: Digesting one of the cadres without even trying to spit him out is what brings to his demise.`
• Villainous Glutton: Seemingly lives to eat and nothing else. Fuhrer Ugly outright states nothing angers Gums more than being denied a meal.

Evil Natural Water

Evil Natural Water

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

Disaster Level: Dragon, Unknown (as Evil Ocean Water)

An aquatic monster made in one of Gyoro Gyoro's experiments Gone Horribly Right. It has rudimentary thought processes, attacking all hostile lifeforms around it with piercing water jets.

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• Anthropomorphic Personification: Once it merges the ocean and becomes Evil Ocean Water, Sage Centipede declares it the incarnation of the ocean itself.
• Attack Its Weak Point: Subverted when Atomic Samurai slashes at its eyes, only for it to create new ones since they're just liquid masses.
• Attack of the 50-Foot Whatever: He is a huge mass of water with a pair of eyes floating inside. Exaggerated when he becomes Evil Ocean Water.
• Blob Monster: Looks like this, with Child Emperor commenting how he looks like an RPG grunt.
• Devour the Dragon: When its body becomes frozen by Child Emperor, it sucks the oil out of Sludge Jellyfish to decrease its own freezing point and render it immune to further freezing attacks.
• Dub Name Change: The Viz translations changed it to "Evil Mineral Water" for some reason.
• Empath: Evil Natural Water is not, actually, all that evil. It only becomes aggressive when exposed to feelings of hostility around it; otherwise, it's just a harmless blob of water. Though interestingly, it seems to ignore the Mad Doctor Fish that lives inside it, but will attack those whose hostility is triggered when battling the fish.
• It Can Think: Downplayed, as Evil Natural Water has no brain and acts mainly on instinct. However, that instinct also belies a hidden intuition and it will use a new strategy to counter the opposition as necessary. When Child Emperor takes advantage of the fact it's just a mass of water and starts freezing it, Evil Natural Water recognizes this and assimilates oil into its body to drastically lower its freezing point and render such a method useless.
• Just Eat Him: Eaten by Pig God in his weakened form who came back to make sure no enemies are remaining.
• Making a Splash: He is capable of firing devastating high-speed jets of water in an instant. The jets of water are about as fast as bullets, fast enough to be almost impossible to track and predict, and have a high enough penetrating power to punch through metal like a high-pressure water cutter.
• Murder Water: It's a blob of water that kills whenever it senses Killing Intent around itself. Granted, otherwise it just sits around.
• Nigh-Invulnerability: His body is made up of water and therefore cannot be harmed by normal means. It however can be scattered to many droplets, if the force used against it is powerful enough.
• Not-So-Harmless Villain: He might look like a Mook, but he's actually quite powerful and nearly impossible to kill through pure physical force. Iairon notes that if it managed to assimilate the ocean it would be all but unstoppable. Sure enough, he becomes upgraded to Evil Ocean Water when he connects with the ocean itself and is now easily one of the greatest threats to humanity alongside Sage Centipede. Thankfully, Saitama takes care of him.
• Offhand Backhand: Saitama pretty much evaporates it with a single punch. He gets better, though... until Pig God eats him anyway.
• One-Winged Angel: Evil Ocean Water, a form which manages to dwarf an aircraft carrier with just a single eyeball.
• Piranha Problem: It has a symbiotic relationship with the Tiger-level Mad Doctor Fish, which are a bunch of bloodthirsty piranha that swim inside its body and devour anything it catches to provide extra protection.
• Super-Toughness: YES. Even a punch from Saitama doesn't exactly kill him and it takes Pig God to finally get rid of him.
• The Voiceless: Never speaks a word onscreen, makes sense because he’s just a water monster.

Nyan

Nyan

Voiced by: Uncredited (Japanese), Christian la Monte (English)

Debut: Chapter 66 (Manga), Episode 18 (Anime)

Disaster Level: Dragon

A house cat who became a monster thanks to his murderous tendencies and over-indulgent owner. He recruits prisoners from Smelly Lid Prison into the Monster Association, and later attacks the Hero Association's surface team.

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• Anthropomorphic Transformation: He transfromed from an ordinary housecat into a bipedal, humanoid cat monster with intelligence.
• Benevolent Boss: He takes direct control of the monsterized criminals, and agrees to their request to allow them to fight Puri Puri Prisoner first to exact revenge.
• Cat Folk: He's a humanoid cat person with big eyes, and a bell collar.
• Canon Foreigner: Nyan is a manga-character only, who doesn't show up in webcomic.
• Combat Pragmatist: He tends to sneak up on his targets and strike them with his claws from behind, and makes liberal use of his superhuman speed to surprise his enemies and slice them mercilessly.
• Dirty Coward: He's quick to run away from anyone that might give him even a little bit of trouble, and will fight only if he has an overwhelming advantage or he can't escape from his opponent.
• Fate Worse than Death: Nyan may not be dead but considering what's in store for him from Drive Knight, he's gonna wish he was.
• Fragile Speedster: He doesn't display the same raw destructive power and durability the other executive members do, but he's incredibly hard to hit thanks to his Super-Speed and Rubber Man abilities. Once Drive Knight lures him into a trap, the fight is over in an instant.
• Freudian Excuse: Parodied. The reason why Nyan, one of the Monster Association's strongest members, became a Mysterious Being is that apparently he felt so annoyed by his previous owner's excessive affection towards him that he transformed into an incredibly strong monster; notably, this dislike of clingy people is the reason why he chose to not fight Puri-Puri Prisoner.
• Hoist by His Own Petard: Nyan decides to slip into Drive Knight's armour to shred him apart from the inside, but Drive Knight purposefully lets him enter his armour while he's in Gold Mode, which happens to produce a lot of heat. Nyan is burned and in his weakened state, is finished off by Drive Knight.
• Hulking Out: When Nyan is prevented from escaping and becomes really angry from Drive Knight's attacks, the monster gets serious and changes into an empowered form with a much more muscular body, more pronounced spiked fur on his shoulders, as well as growing very long claws.
• Inconsistent Spelling: Spelled "Nyaan" in the Viz translation.
• More Teeth than the Osmond Family: When he has the upper hand in his fight with the surface team, he sports a huge grin that shows all his razor sharp teeth.
• No-Sell: During his fight with the backup team on Z-City, C-Class Hero Poison tries to stab him in the eye with his knife once A-Class Hero Green has him restrained with his vines. Nyan's response? Catch the knife with his EYELID, which he then procedes to break.
• Not-So-Harmless Villain: Despite looking like a humanoid house cat, he's frequently seen along side the rest of the Dragon-level monsters whenever they're mentioned or shown together. He proves why he's Dragon-level when he runs into a group of lower-ranked Heroes on the surface and completely curbstomps them.
• Paper People: One of the applications of his Rubber Man ability is to turn himself flat like a paper to avoid attacks.
• Razor Wind: When he's serious enough, his long claws are capable of generating claw-like blades of wind capable of shredding an entire street with each swing.
• Rubber Man: Well, Rubber Cat-Man. Just like ordinary cats can seem to slip through the tiniest openings, Nyan has the ability to slip through any crack larger than 3 millimeters to travel around, and is capable of turning flat to avoid attacks. In fact he can even infiltrate intricate electronic devices.
• Sadist: His desire to play with prey before killing it back when he was still an ordinary cat carried over after his transformation. This is demonstrated to great effect when he runs into a group of lower-ranked Heroes who stand no chance against him.
• Screw This, I'm Out of Here!: Tends to run away when his surprise attacks fail to put down his enemy with the first blow. When facing Puri Puri Prisoner he's merely unsettled by the Hero's "loving nature" (see Freudian Excuse above) and disturbed to the point of running away. When he attacks Saitama, he's completely freaked out by his inability to inflict damage on him (And probably for the fact he just nonchalantly defeated Rover, which is by no means easy), prompting Nyan to run away. Later when he's on the surface attacking heroes, he claims in his mind he's no longer a member of Monster Association.
• Slasher Smile: Sports a massive one with More Teeth than the Osmond Family when declaring his intention to kill Waganma in front of the heroes on the surface.
• Stealth Expert: His ability to squeeze through any crack lets him spy and get the drop on others very effectively.
• Super-Speed: Fast enough to perform a Flash Step followed by You Are Already Dead.
• The Worf Effect: He proves why he's an executive when he runs into the surface team of heroes and tears them apart without even trying. And then he's on a receiving end from Drive Knight, who didn't get a chance to fight anyone tougher than a Mook and show off his true abilities.

Gouketsu

Gouketsu

Voiced by: Kenji Nomura (Japanese), Kellen Goff (English)

Debut: Chapter 66 (Manga), Episode 18 (Anime)

Disaster Level: Dragon

A giant Dragon-level monster who was previously a martial artist and Super Fight champion. After being defeated by Orochi back in the day, he ate a Monster Cell and became a monster. He crashes this year's Super Fight to recruit more martial artists into the Monster Association.

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• Always Someone Better: Had this done to him in the past by the Monster King and deals it to Suiryu in the present. On a personal level, he's fully aware of this trope in general and advises Bakuzan not to get too caught up in his newfound power, pointing out that he himself is still much stronger than the newly transformed Bakuzan with the Monster King Orochi being even stronger still. Then he runs into Saitama, who of course is the "someone better" to everyone else on the planet.
• Ambition Is Evil: His ambition prompts him to consume a Monster Cell and gain even more power.
• Anime Hair: Good lord, it's probably the craziest in the entire series. It looks like a sea urchin, even when he was a human!
• Arc Villain: He replaces Anti-Villain Suiryu in Super Fight Arc. Subverted later, where he gets replaced by transformed into monster Bakuzan, both of them being killed by Saitama anyway.
• Arrogant Kung-Fu Guy: He's quite arrogant and became even more arrogant after eating Monster Cells and turning into a monster. That said he's also rather grounded since he outright admits that the Monster King is still stronger than him and that he wouldn't stand a chance against the combined might of the Hero Association on his own.
• Art Evolution: Gouketsu was originally designed without the black marking on his forehead and chin. His teeth were larger and sharper, while the redrawn version looks more human.
• Benevolent Boss: Surprisingly enough, he can be this if you manage to impress him. When Bakuzan becomes a monster and attacks him, Gouketsu goes out of his way to subdue him harmlessly, then explain how to navigate his new life as a monster and how the Monster Association works. It comes off as a veteran worker showing the new guy how things go in the workplace.
• Curb-Stomp Battle: Defeats Sneck and Lightning Max with one kick. Also defeats Genos in a battle so one sided, it's not even shown. Suiryu gets beaten badly with two restrained punches and a bunch of flicks from one finger. Monster Bakuzan doesn't fare any better despite being a fellow Dragon-level monster; he gets sent flying just by having a punch blocked and wisely surrenders after Gouketsu demonstrates his true strength by destroying the stadium with the sheer force of a punch a la Saitama. And then he meets Saitama off-screen, who promptly sends his head flying.
• Curb Stomp Cushion: Implied. When Saitama takes him on in an off-screen big moment, he still goes down in one hit, but Saitama returns with some noticeable scratches on his clothes, though he was unable to damage him just like others.
• Deliberate Under-Performance: When he sent Lightning Max and Sneck flying, he said he just "tapped" them.
• Dope Slap: Gives one to Suiryu after he rejects his offer. It hurts a lot more than it looks.
• Dropped a Bridge on Him: He seems a sort of future Arc Villain. Instead he is quickly killed by Saitama... off-screen!
• Even Evil Has Standards: He's not fond of Bakuzan's arrogant behavior, such as eating all remaining monsters cells or thinking of himself as the most powerful monster in the world. Additionally, unlike many other monsters in association and Bakuzan, he's not the case of Small Name, Big Ego, saying that while he's a Dragon-Level threat, there are definitely stronger members than him.
• Expy: Of Akuma/Gouki from Street Fighter. He's a martial artist who embraced a darker route to achieve power, who corrupts other fighters into becoming powerful monsters, just like what Akuma tries to do with Ryu. He also physically resembles Akuma, from his hair to the clothes he's wearing.
• Extra Eyes: He has four eyes. He grew the extra pair after becoming a monster.
• Finger Poke of Doom: Catches Suiryu's full strength attack by pinching it and delivers a No-Holds-Barred Beatdown on him by flicking him with his middle finger.
• Inconsistent Spelling: In the Viz translation his name is spelled "Goketsu" to ensure proper English pronunciation.
• Killed Offscreen: Saitama kills him as usual with one punch, and the result is monster's head dropping right in front of Suiryu.
• Knight of Cerebus: The Super Fight Arc was fairly light-hearted. Once it's over, Gouketsu barges in and the tone of the manga takes a sudden and dark turn, complete with the most brutal beatdowns seen yet.
• Lightning Bruiser: Despite his oversized body, he can move pretty fast as he delivered a quick kick to Lightning Max and Sneck and sent them flying. He also defeats Genos before the latter even knew what hit him. He also manages to cause shockwaves that could be felt throughout the city in his fight with Saitama, and slightly ruffle up his clothes.
• No-Sell: He lets Suiryu's attacks bounce off before slapping him down to let him know just how outmatched he is.
• Off with His Head!: When he is killed by Saitama off-screen, his head gets ripped off by Saitama's punch and flies right into the stadium, falling in front of a weakened Suiryu.
• Sadistic Choice: Gives this to the martial art contestants. Either eat the Monster Cells to become a monster and join the Monster Association or be killed by him.
• Small Name, Big Ego: Subverted, as while he is very powerful, even he claims that there are stronger monsters at the association, which is a far cry from many other members.
• Spikes of Villainy: His arms and shoulders are covered with spikes, and that's before one takes into account his crazy hair.
• We Can Rule Together: Offers Suiryu a second chance to become a monster and a high ranked officer in the Monster Association despite his earlier defiance because of his great strength, by appealing to his desire for an easy life.

Centichoro

Centichoro

Voiced by: Naoki Bando (Japanese), Richard Epcar(English)

Debut: Chapter 55 (Manga), Episode 16 (Anime)

Disaster Level: Dragon

A truly gargantuan Dragon-level beast, and supposedly the highest tier of the centipede monsters. He doesn't care much about the Monster Association, but holds a grudge against Blast for nearly killing him years ago and is looking for a rematch.

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• Always a Bigger Fish: He appeared after Centisempai's death who appeared after Centikohai's death. Also he's the first Dragon-level monster who debuted in this arc, and the first one who is explicitly said to be this level in the manga (the ones before were revealed through Word of God). According to Phoenix, the only members of the Association who could hope to kill him are Tatsumaki, Metal Knight using his secret stash of weaponry, King, or Blast, the man who nearly killed him the first time.
• Arc Villain: In the Hero Counterattack Arc, after heavily injured Garou gets taken away by Phoenix Man, he re-emerges from the ground again, making the trouble for Bang, Bomb and Genos.
• Berserk Button: Blast is his, since the Number 1 S-Class Hero almost killed him in the past.
• Big Creepy-Crawlies: He's a Kaiju-sized centipede with an old man face.
• Body Horror: He appears to have an insectoid face with four eyes and three humanoid faces nested in each other's mouths. After molting, he grows yet another face within a mouth and two extra eyes.
• Combat Pragmatist: Despite his Super-Toughness, Centichoro noticeably takes steps to make sure opponents can't hit his (comparatively) fragile face, shifting his body and mandibles as shields as necessary when he could likely just power through them anyways and trust his regeneration to do the rest. It's implied this has to do with nearly being killed by Blast in the past, thus being a lesson of humility.
• Climax Boss: His suitably grand battle with Bang, Bomb, Genos and subsequently Saitama is the climax of the first half of the Monster Association Arc, with Garou's gradual monsterization and the invasion of the Monster Association base marking the second half.
• Creepy Centipedes: The biggest and baddest of them all, being a Dragon-level Kaiju with creepy old man faces.
• Dub Name Change: Unofficial translations referred to him as "Elder Centipede" before he got his Viz name "Centichoro".
• Eye Scream: Genos stabs his old man face's eyes several times, but aside from roaring in pain and annoyance it doesn't phase Centichoro for long before he regenerates.
• Good Thing You Can Heal: Even in the event something manages to hurt him, he can just molt his carapace to repair the damage. He's even able to regenerate from Genos frying his insides with a powerful blast. The only way to finish him is to hit him with enough force to kill him in one shot, and even that took Saitama using a Serious Series Serious Punch (although it was to prevent EC's huge body rolling into the city and wrecking it.)
• Nested Mouths: Exaggerated with nested heads within each mouth.
• No-Sell: Metal Knight's attacks didn't even scratch him, and Metal Bat's own strikes (which just previously had torn through Centisempai's carapace) to his face just annoy him.
• Power Pincers: He tore Genos in half with his oversized mandibles.
• Purple Is Powerful: His carapace in the anime is a dark purple, and he's the most powerful of the centipede monsters.
• Rent-a-Zilla: Large enough to coil around several skyscrapers with ease, and is called "the incarnation of a natural disaster" by Phoenix Man. It's noted by the Association he's actually grown since the last time he was spotted.
• Sand Worm: He basically swims through the ground, only surfacing when he is needed.
• Super-Toughness: His shell has so far proven to be completely impenetrable to everything that's been thrown at it with neither Metal Bat's swings or Metal Knight's missiles doing any damage whatsoever. His face and insides are the only comparatively vulnerable points and even then he seemed more annoyed than anything else after Metal Bat strikes the former several times. Even after Bang and Bomb destroy his carapace with a combined attack, and later still when Genos fries his insides, he simply molts into a more powerful form.
• Too Long; Didn't Dub: His official dub name Centichoro is the prefix centi- slapped onto the Japanese word for elder. Chances are, most readers won't understand what choro means or that his name is supposed to go with the age theming with the younger centipede monsters.
• Villain: Exit, Stage Left: After Phoenix Man failed to persuade Garou, Centichoro grabbed him and Rhino Wrestler and ran away.

Dragon-Level Members (Others)

Phoenix Man

Phoenix Man/Phoenix Man Reincarnated

Voiced by: Hiroki Maeda (Japanese), Jonah Scott (English)

Debut: Chapter 60 (Webcomic), Chapter 58 (Manga), Episode 17 (Anime)

Disaster Level: Dragon (Formerly Demon)

Phoenix Man.

Click ^here  to see Phoenix Man Reincarnated.

A man who once acted in the dark comedy "Animal Empire" as Birdman, an idiotic phoenix who died and revived every episode for Slapstick effect, before the show was canceled and he was fired by a cruel producer. Unable to let go, he continued to wear the costume until he lost his humanity and fused with it, becoming a human-sized bird. As arrogant and ambitious as he is intelligent, Phoenix Man dreams of one day obtaining the power to become the true Monster King.

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• Adaptational Badass: He was just a one-off joke in the webcomic, appearing for two panels before being eviscerated by Child Emperor and never seen again. In the manga, not only does he actually have the power to revive like a phoenix, but he is strong enough to give Child Emperor a mind-bending physical and psychological struggle over the course of several chapters.
• Adaptation Expansion: Receives more characterization and plays a much more substantial role in the manga.
• Adaptation Personality Change: Is far more rational and pragmatic in the manga than the delusional and arrogant webcomic version, understanding that there are many heroes and monsters much stronger than him. That said, after learning that Orochi Was Once a Man, he seeks to reach even greater power someday. More closely resembles his original personality once he reaches his Dragon state, though in this case his bite is much more capable of matching his bark.
• Adaptive Armor: After he reincarnated his costume can transform into various modes with each giving him a different ability.
• Beak Attack: As a bird-creature, he can obviously do this, but Child Emperor throws up a barrier that he smashes in failure against before he gets finished off. When he returns as Phoenix Man Reincarnated, however, he can now perform the move with even greater strength along with combining it with fire, which lets him punch through five such barriers at once without pause.
• Big Damn Heroes: He rescues Garou from Silver Fang, Bomb and Genos, flying with him to Monster Association HQ.
• Bird People: Was previously a man with a phoenix costume, now is fused with it.
• Bishōnen Line: After coming back to life, he goes from looking like a giant bird to an athletic Winged Humanoid with the costume looking more like some sort of armor.
• Blow You Away: He created a gust of wind strong enough to blow Bang, Bomb, Garou, and Genos away.
• Came Back Strong: After dying to Child Emperor, Phoenix Man came back to life as Phoenix Man Reincarnated and got a massive power boost in the process (going from Demon-level to Dragon-level monster), allowing him to go toe-to-toe with Child Emperor's greatest weapons.
• The Chew Toy: He was this in a children's TV show, being a character called Birdbrain who'd be made fun of because he died numerous comical deaths.
• Clothes Make the Superman: He originally became a monster when his costume stuck onto him, giving him the resurrection abilities Birdbrain possessed. As he keeps resurrecting and getting stronger, the costume starts giving him more and more phoenix-themed abilities. Deconstructed, however. Child Emperor figures out the key to defeating Phoenix Man is using his costume against him, slipping a tickling robot inside that would forcibly tickle him until he died. In the original Chapter 100, Phoenix Man ends up tearing his costume open to get rid of it and loses his powers, leaving him open for a quick and brutal kill. In the redraw, he refuses to take off the costume and thus laughs and cries to death until he... Well, turns into a baby chick with a "Below Wolf" disaster level, the lowest in the series.
• Curb-Stomp Battle: Easily killed by Child Emperor as Phoenix Man. The rematch, however, proves a different story, with Child Emperor noting that Phoenix Man Reincarnated would have likely overpowered him if he didn't get lucky.
• Eyes Do Not Belong There: His Reincarnated form has ordinary eyes, but also three working eyes on his bird costume's head and his chest.
• Evil Is Hammy: In his Reincarnated form he often boasts out laughs and shouts a lot.
• Fatal Flaw: Pride and wrath. Sick of always being the chew toy, he worked his way up to being one of the strongest monsters. Upon getting to that level, he constantly brags and taunts Child Emperor instead of finishing him off and then charges in for a final melee attack when he's mocked in return. This allows Child Emperor to hit him with a tickle bot that makes opponents laugh themselves to death, and since he refuses to take his costume off, he approaches death and is reincarnated as a baby bird.
• Flight: He's a bird, so he can fly.
• Foil: Proves to be one to both Saitama and Child Emperor. He is a hard working man who desired to be strong, but lost hope in both working with people and monsters. He wants to have real allies, people he can trust and won't screw him over. He became a monster after he was fired from his job while Saitama became a hero. He is a good leader and strategist like Child Emperor, but more mature yet less hopeful. He even develops "Saitama bored face" in his penguin mode. In the end, he is reduced to a harmless state and eventually grows big enough to serve as a traffic guide mascot, to which Child Emperor consults over the dark side of the Hero Association.
• Freudian Excuse: He got fired from his costume actor job and refused to take off his costume, which stuck onto him and turned him into a monster.
• Friendly Enemy: After his defeat, Phoenix Man serves as sort of an acquaintance for Child Emperor and talks with him about darker side of Hero Association, though the latter still sees him as potential threat.
• Friend to All Children: Played with, as he does have a soft spot for them, given that he worked on a children's show, but he still attempts to kill Child Emperor, even with giving him "slow and painless death". Later after being revived, he tries to "befriend" Child Emperor and turn him into costumed monster too, though still in rather affable manner. Justified, since despite his intentions, Phoenix Man is still a monster.
  • Eventually it's played straight. After another revival and regaining a bit of power, he becomes a school crossing guard, with him cheering on children and vice versa.
• From Nobody to Nightmare: He used to be just an actor of a child show, but after getting fired and not taking off his costume he became a Demon-level monster. After his resurrection he became an extremely powerful Dragon-level threat - however, he is rendered into a harmless chick-like state at the end of his fight with Child Emperor.
• Groin Attack: In the original version of Chapter 100, he suffers the worst one in the series yet when Child Emperor kicks him down there while wearing an active chainsaw on his foot.
• Heel–Face Turn: After surviving and escaping as a chick man, he regains a bit of his strength, rejoins to human society and works as school crossing guard, having so far no plans to become a monster again and helps Child Emperor in gaining information from dark side of Hero Association.
• Hoist by His Own Petard: Phoenix Man refuses to take off his costume to escape Child Emperor's tickle bot, resulting in his own defeat. In the original, he ends up tearing his costume open to escape the tickle bot and thus loses his powers to make him helpless against the vengeful Child Emperor's finishing blow.
• Instant Armor: The new humanoid body he gains after coming back from the dead, also came with an impressive armored suit to signify his increase in power.
• Just a Kid: What he thought of Child Emperor, thinking he got into the Hero Association purely for fame and thinking he was a match for him. Apparently it never crossed his mind that the kid was an S-Rank hero for a reason. Phoenix Man was shredded up by Child Emperor's many blades for his trouble. He later uses this information against him, however, by manipulating his feelings about being a child among incompetent adults.
• Killed Off for Real: In the original Chapter 100, Child Emperor killed him by stabbing him through the chest and in first redrawn version tickling him to death in his organism. However, the second and official redrawn Chapter 100 shows that he survived the attack, albeit now he's in the form of a tiny, harmless chick.
• Light Is Not Good: His suit can create a light which resurrects nearby monster corpses into a zombie army. However, the fresher the corpses are, the more of their original functions they retain, as seen with the two ninjas.
• Meaningful Name: The Phoenix is a mythical bird most commonly associated with fire and Resurrective Immortality. Guess what Phoenix Man can do after dying?
• Noble Demon: Prefers to not go straight into violence and tries to talk things out, as shown with characters as Garou or Child Emperor.
• Oh, Crap!:
  • In the original Chapter 100, he has one when he realizes in his haste to tear off his costume and remove Child Emperor's tickling machine, he also just removed the source of his powers.
  • He's very surprised Saitama was able too tear through to his Pocket Dimension Phoenix Space, and is visibly scared of the hero threating him for abusing Child Emperor.
• Pet the Dog:
  • At multiple points he expresses some level of concern for his monster comrades and admits he prefers to settle things in a civilized manner rather than go straight for savagery.
  • He seems to have a bit of a soft spot for children due to his time on "Animal Empire", offering to grant Child Emperor a painless death when encountering him and intending to follow through on that even after Child Emperor kills him the first time. It's certainly more noble than with most monsters attempting to torture their opponents before killing them. When Child Emperor summons Brave Giant, Phoenix Man recognizes his fellow costume-user and actually reaches out to him in a costume-based mindscape. Of course, even that has its limit, as he notes after Child Emperor fails to kill him yet again that he's going to eat his brains.
• Playing with Fire: As Phoenix Man Reincarnated, he can now unleash heat waves and actual flames for attacks.
• Pocket Dimension: One of his many powers in Reincarnated form in official release is "Phoenix Space", a small dimension that's inside Phoenix Man's costume. A significant part of his fight with Child Emperor is spend in that place, where the monster explains his plans to the young hero.
• Small Name, Big Ego: Originally claims to be of a higher disaster level than Demon, but Child Emperor proves otherwise. That is, until he came back to life as Phoenix Man Reincarnated, a Dragon-level threat. This is more of a webcomic trait, where he's just another arrogant monster of many, that is easily killed off.
• Stance System: Phoenix Man Reincarnated fights by shifting between several modes, each with its own unique abilities.
  • Phoenix Fire Falcon Mode gives him enhanced speed, flaming claws, and a Feather Flechette Storm.
  • Phoenix Prominence Hawk Mode gives him Super-Strength and Energy Absorption, but there is a limit to how much he can absorb at a time.
  • Phoenix Penguin Mode is a Lethal Joke Form that gives him the ability to control ice and slide on his belly.
  • Although it is non-canon thanks to the Chapter 100 redraw, his second resurrection gave him Phoenix Brilliant Eagle Mode, which allowed him to repair and reanimate nearby corpses as his soldiers.
• The Starscream: Despite being merely being placed middle in terms of power ranking, Phoenix Man has an ambition to overthrow King Orochi.
• Talking Is a Free Action: Monologued to Child Emperor about the hero's youth, and how he'd one day surpass Orochi. It gave Child Emperor enough time to set up a defense that stopped him cold.
• They Killed Kenny Again: The character his costume is based on, Birdbrain, dies every episode in some hilariously stupid way but always came back the next episode. This trait of the character actually helped Phoenix Man as it gave him the ability to come back to life after dying.
• Token Competent Minion: He's one of the smarter members of association, and doesn't give up so easily.
• Token Good Teammate: Downplayed, he's not heroic at all, although he's much more affable and noble than other members of association, his plans alone are also more varied than the others beyond destruction. Eventually after his defeat, he gives up being a villain... for now.
• Too Dumb to Live: Not Phoenix Man himself but rather the character, Birdbrain, that his phoenix costume is based on. Birdbrain kept dying every episode because of his stupidity but always came back the next episode to die again.
• Took a Level in Badass: After dying and coming back to life as Phoenix Man Reincarnated, he went from a Demon threat who got killed easily by Child Emperor to a Dragon threat who forces the kid hero to use his ultimate weapon.
• Underestimating Badassery: Even though he acknowledged he wasn't yet very powerful, he still thought Child Emperor, an S-Ranked hero, would be an easy victory. Boy, was he wrong.
  • He then gets put on the receiving end of this by Child Emperor, after his return as Phoenix Man Reincarnated; where the Hero believed that since his barrier defense worked the last time, five layers would also be enough to stop the monster again. Phoenix Man proves that assumption to be equally wrong.
• Villain Has a Point: Despite him being a member of Monster Association, he's not exactly wrong about Hero Association being corrupted. Which is why Child Emperor eventually comes to talk with him about it, discovering the monster was right about them.
• We Can Rule Together: Offers Child Emperor a chance to become a monster like him and join his side to make a whole new group. Thankfully, he rejects the offer and Saitama also shows up to talk a bit of sense to the monster mind.
• Winged Humanoid: After he Came Back Strong and crossed the Bishōnen Line, he now has this look.
• Would Hurt a Child: Grooming a Child Emperor and attempting to turn him into monster certainly counts, though in Phoenix Man's eyes it's a bit more complicated. Later when Child Emperor rejects the idea of joining to his side, he throws his affability and orders ressurected Subterrenianss to eat kid's brain, though he still wants to turn him into monster.

Gale Wind & Hellfire Flame

Gale Wind & Hellfire Flame

Gale Wind Voiced by: Taishi Murata (Japanese), Grant George (English)

Hellfire Flame Voiced by: Yasuaki Takumi (Japanese), Tim Friedlander (English)

Debut: Chapter 78 (Manga)

Disaster Level: Dragon

Hellfire Flame and Gale Wind.

Click ^here  to see their monster forms.

A duo of ninjas from the same village as Speed-o'-Sound Sonic and Flashy Flash. They ate Monster Cells and joined the Monster Association. Despite possessing Dragon-level strength at full power, they are seen as only executive candidates and prefer a position as mercenaries, simply using the Association's resources for their personal ends in exchange for services.

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• The Ace: They are the strongest members of the 37th generation of Ninja their village have produced, which they also claim is the strongest generation their village produced in general. Flash, after cutting them down, does acknowledge that with their speed and power they might have stood a good chance of defeating just about any other S-Class hero in the assault.
• Adaptational Badass: In the original webcomic, their only appearance was getting instantly defeated by Flashy Flash. In the manga, they're Dragon-level threats at full power capable of keeping up with Flashy Flash in speed, however it's shown that they never stood a chance anyway.
• Arachnid Appearance and Attire: Gale Wind uses cobweb-like razor wire and even gains 4 spider legs coming out of his head in his monster form.
• Archenemy: They've got some serious beef with Flash for an unspecified incident in the past. Flash for his part doesn't even know who they are.
• Back from the Dead: After being bisected by Flashy Flash, their bodies are repaired and reanimated by Phoenix Man Reincarnated to fight Child Emperor, who uses an electrical attack to destroy the corpses but instead restarts their hearts. They decide to leg it out of there.
• Combination Attack: Their Tempest Blade Kick consists of both kicks at the same time.
• Department of Redundancy Department: A common naming theme for ninjas from the village.
• Dub Name Change: The Viz translation calls Gale Wind "Tempest Wind" instead. Hellfire Flame stays the same.
• Evil Counterpart: Both of them serve this to Flash, by being ninja assassins.
• Flaming Sword: Hellfire Flame wields a flaming sword.
• Freudian Excuse: They were sick of being treated like living weapons as assassins and wanted to take charge for once, so they became monsters to Take Over the World.
• Foregone Conclusion: The last time they're seen in the Manga is after running into Saitama and declaring they will go look for Flash again. Since they reappeared in the Webcomic along with a group of other Ninjas just in time for Flash to reveal his and Sonic's backstory, it is obvious they will survive the rest of the Monster Association Arc and any other encounter with Flash they might have. This is a more recent web comic revelation which subverts their original foregone conclusion, where they were expected to stay dead or get killed off again because their original web comic counterparts were killed off.
• Half the Man He Used to Be: To both of them by Flash with a single strike.
• Hard Work Hardly Works: In their quest to Take Over the World they turned to monsterization as a short-cut to gain power, rather than through training. It ultimately gets them killed by Flash, as they aren't able to fully control their speed and wild attacks, and are bested by his more deliberate movements and precise timing.
• It's Personal: Hilariously a trait of ninjas from their village; they can't stand any outsiders seeing through their moves. After being resurrected by Phoenix Man, they run into Saitama who dodges them easily. They proclaim that they won't forget that and will come for him later just like Sonic did before and Flash will after them.
• Kukris Are Kool: Gale Wind wields a pair of them.
• Long-Haired Pretty Boy: Gale Wind, like Sonic, is exceptionally feminine in looks.
• Ninja: They are the seniors of Sonic and Flashy Flash, coming from the same training village.
• Not So Above It All: Despite them being villians, they also are fine with killing their fellow criminals.
• One-Winged Angel: In their human forms they classify as Demon-level threats, but can transform into their monster forms which boost their powers to Dragon.
• Playing with Fire: Hellfire Flame, as his name suggests, can create flames with his attacks. His own version of Wind Blade Kick is even called Flame Blade Kick.
• Power Levels: In the original webcomic, they were Demon-level robots who were easily dispatched by Flashy Flash. In the manga, they're Demon-level threats in their human forms but as monsters, they're Dragon-level threats.
• Razor Floss: Gale Wind attempts to use these against Flashy Flash to restrict his speed, noting they're tough enough that if Flash runs into them at his full momentum, he could cut himself apart. Flash deals with it by destroying the walls the threads are attached to and making them useless.
• Retcon: In spirit, at least, although not technically. In the webcomic, they were robots named Hellfire and Gale who were instantly killed. Then in the manga, they were ninjas named Hellfire Flame and Gale Wind who were killed but revived. And then eventually the ninjas Hellfire Flame and Gale Wind show up alive and well in the webcomic, despite how the robots they originally were (out of story) being dead. Presumably in this case the reader is meant to assume the robots "Hellfire" and "Gale" are completely different beings from the ninjas "Hellfire Flame" and "Gale Wind" and just coincidentally had similar names.
• Spared by the Adaptation: They get revived by Phoenix Man accidently, but seem to lose their memories of losing and dying and proceed to run around looking for Flashy Flash. The ninjas then show up alive later on in the web-comic too, possibly because the dead robots they were based on were different enough to be considered separate unrelated characters from them.
• Spin Attack: Both use spinning kicks, with Gale Wind using Wind Blade Kick and Hellfire Flame using Flame Blade Kick.
• Super-Speed: They can easily keep up with Sonic in their human forms, but severely outclass him as monsters. Their human forms struggle to keep up with Flashy Flash, however, forcing them to use their monster forms to regain the edge. It's still not enough, and Flash proves to be so much faster they don't even know what hit them until they're lying on the floor in pieces.
• Suspiciously Similar Substitute: They have similar names and abilities with Gale and Hellfire, a pair of robots from the original webcomic.
  • It's been confirmed that they are indeed replacements as ONE based their original designs off other copyrighted characters from his previous studio.
• Time Stands Still: Their battle with Flashy Flash when in their monster forms is so fast that the explosions from them clashing only happen after the battle is over.
• Transformation Horror: They are fairly handsome in their human form, but are very ugly in their monsters form. This is probably a factor why they choose to stay in their human forms most of the time.
• Trauma-Induced Amnesia: Being brought back from death has robbed the last few minutes of their memories before death. From their perspective, they were fighting Flash then suddenly woke up naked on the ground while Child Emperor and Phoenix Man were fighting.
• Underestimating Badassery: They think they're much better than Flash since they're the strongest ninjas from their generation which is supposedly the greatest their village has ever produced, on top of having monster forms for a power boost. Unfortunately for them, Flash proves to be the greatest ninja from their village ever, and beats them single-handedly.
• Unskilled, but Strong: They're actually plenty skilled, but it's noted by Flash and confirmed by themselves that while their monster forms boost their powers to incredible levels, they still haven't fully mastered said powers. It's why they changed the location of their battle from the narrow hallways to the wide-open space of their training grounds so they could better use said abilities. The difference in control is shown during their battle; the three move at roughly the same speed but while Flash moves gracefully without leaving a mark, the duo smash through everything because they can't stop themselves in time. It's ultimately the main reason why they lose to Flash, who notes that if they had properly trained themselves to that level of power rather than short-cut it with monsterization, they would have posed an even bigger threat to him.
• Walk on Water: As ninjas, they can run on water and even run up waterfalls.
• We Can Rule Together: They give a Monster Cell to Sonic, offering him a place in the Monster Association. Naturally, he's not interested in joining them, though he eats it anyway to surpass Saitama... by cooking it and serving like a dish, which makes the process failed.
• Wreathed in Flames: Hellfire Flame's monster form is partially covered in fire.

Demon-Level Members

Rafflesidon

Rafflesidon

Voiced by: Uncredited (Japanese), Bill Rogers (English)

Debut: Chapter 54 (Manga), Episode 16 (Anime)

Disaster Level: Demon

A plant monster who can release sleeping gases. Participated in the mission to kidnap Waganma.

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• Combat Tentacles: It primarily attacks with its vines.
• Curb-Stomp Battle: After Metal Bat gets pumped up again, he kills Rafflesidon in one hit.
• Dub Name Change: Called "Lafreshidon" in the Viz translation.
• Instant Sedation: It releases a gas that can knock people out in seconds. However, Metal Bat was able to resist it due to his Fighting Spirit.
• Plant Person: It's basically a rafflesia flower monster.

Eyesight

Eyesight

Voiced by: Misako Tomioka (Japanese), Lauren Landa (English)

Debut: Chapter 58 (Manga), Episode 17 (Anime)

Disaster Level: Demon

A naga monster who attacks Y-City during the Monster Raid Arc.

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• Death by Irony: She's swallowed whole by Pig God, right after she threatened to eat Child Emperor.
• Dub Name Change: Called "Ganriki" in the Viz translations, which is just her Japanese name. It means "insight".
• Gorgeous Gorgon: She's a bit human-like and has a nice figure, but averts it completely in her One-Winged Angel form.
• One-Winged Angel: After Child Emperor's robot self-destructed against her, she's enraged and becomes more snake-like.
• The Noseless: In all panels she is shown while in her more humanoid form, her face is flat and smooth.
• The Paralyzer: Her bites immobilize her victims completely.
• Poisonous Person: Her venom's potency can range from paralyzing humans to killing large monsters.
• Serpent Staff: She wields a long staff adorned with two snakes.
• Snakes Are Sinister: She certainly is, especially in her One-Winged Angel form.
• Super-Senses: Like some snakes, she can sense the heat of her preys.
• We Hardly Knew Ye: Despite her popularity, she was merc'd by Pig God not too long after her debut.

Do-S

Do-S

Voiced by: Natsumi Fujiwara (Japanese), Wendee Lee (English)

Debut: Chapter 59 (Manga), Episode 17 (Anime)

Disaster Level: Demon

A dominatrix monster first seen fighting the Blizzard Group during the Monster Raid Arc. Her ability to whip heroes into "love slaves" makes her a powerful asset for the Monster Association.

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• A Taste of Their Own Medicine: Blizzard beats her with her own whip once she's at her mercy with no real aim except venting her frustrations. Given the little hearts around Do-S afterwards, it can be surmised she was Too Kinky to Torture.
• Alas, Poor Villain: In the original version of chapter 103, Do-S was seen begging for her life only to have her throat crushed by Sweet Mask, making the reader pity her gruesome fate. This was changed in a future revision to make Sweet Mask seem less evil.
• Ambiguously Bi: The Depraved Bisexual variation if she truly is bisexual. She seems happy to turn anyone into her "love slaves" regardless of gender, engages in flirty dialog towards Fubuki while stating a strong desire to enthrall her specifically, and then later propositions Sweet Mask into sleeping with her.
• Back from the Dead: Shown to still be alive in a redraw after being dead for quite some time. Apparently she has the ability to regenerate from extreme blunt force trauma, such as being smashed into a wall.
• Cute Monster Girl: It helps that she looks almost human.
  • Without her mask, her face makes her look rather nightmarish and a source of Fan Disservice. The art in later chapters after her defeat downplay that, to the point where she sometimes looks downright adorable even without her mask, possibly due to her being reduced to an Ineffectual Sympathetic Villain by that point.
• Designated Girl Fight: It was inevitable that her first major battle would be against a fellow Ms. Fanservice in the form of Fubuki.
• Dominatrix: Her look combined with her power to transform people into "love slaves".
• Dub Name Change: Called "Super S" in the Viz translations and english anime dub, and in other places sometimes "Crossbow S" (a pun on the character used to spell her Japanese name).
• Expy: Of Mileena. Like Mileena, she wears clothing that reveals her attractive body and wears a mask that conceals her sharp-toothed mouth.
• Evil Counterpart: To Fubuki, as they are both female leaders of her groups, however Fubuki's despite her flaws deeply cares for her members and treats them well, unlike Do-S who brainwashes her "subordinates" and eventually makes them turn into monsters, though not permanently.
• Fashionable Asymmetry: Her thigh-high boots and gloves are mismatched and she wears a flower on one side of her hair.
• I Love You Because I Can't Control You: Do-S claimed that she "wanted her more", after Fubuki was able to resist her mind control. Although this is later subverted when Do-S drops her flirty attitude towards Fubuki after she injured Do-S, and Do-S decides to kill Fubuki instead of enslaving her.
  • Comes out again when she encounters Sweet Mask, who she definitely can't control, which only makes her gush more over him.
• Intercourse with You: She blatantly proposed Sweet Mask to have sex with her, in exchange of that she "might" release her slaves from the brainwashing. Sweet Mask didn't really appreciate that. At all.
• Glasgow Grin: She hides a particularly jagged and large one underneath her mask.
• Know When to Fold Them: After having seen how Tatsumaki brutalized the other monsters, she attacked her with her mind-controlled slaves so she could run away.
• Mind-Control Device: Do-S can control people's minds by hitting them with her whip. Those who are controlled by her, have heart-shaped pupils and are referred as her "love slaves".
• Monster Fangirl: Inverted. Do-S is the monster yet she's shown to be a sincere fan of Sweet Mask and his shows. She even expressed joy to finally be able to meet him. Though she was completely ignorant of Sweet Mask's true nature.
• Ms. Fanservice: A monster that resembles a human female dresses in a BDSM outfit made of straps and held by metal rings revealing her fit and voluptuous figure.
• Oh, Crap!: After whitnessing Tatsumaki's attack.
• Overly-Long Tongue: It's usually hidden behind her mask.
• Pretend to Be Brainwashed: When Fubuki defeats her after their second round, she uses Do-S blackwhip to control her, though it doesn't work on her, and pretends to be under her rule, in order to introduce Fubuki and Martial Arts Brothers to Overgrown Rover.
• Rubber Man: Shows off this ability in the redrawn chapter 103, wrapping her leg around Sweet Mask to restrain him.
• Spikes of Villainy: She wears a spiked collar, two spiked bands on one arm and a spiked garter on one leg. Her whip is also adorned with spikes.
• Suspiciously Similar Substitute: Of Goddess Glasses from the original webcomic.
  • It's been confirmed that she is indeed a replacement as ONE based her original design off another copyrighted character from his previous studio.
• Uncertain Doom: The last we see from her in official version is her falling to the abyss from Fubuki's attack, after Do-S introduces Overgrown Rover to her, Bang and Bomb.
• Villains Want Mercy: In the original version of chapter 103. After seeing her love slaves being mercilessly slaughtered, she quickly surrendered and begged Sweet Mask to spare her life; in exchange she'll do anything he wants. Unfortunately for her, Sweet Mask desired nothing but her gruesome death.
• Whip of Dominance: She is a sadistic Dominatrix-themed villainess dressed in Stripperiffic bondage gear who specializes in fighting with a whip that is embedded with spikes. Her whip also functions as a Mind-Control Device, meaning that whoever gets whipped by her falls under her thrall and becomes one of her "love slaves" that obeys her every command. Only very strong-willed people are able to resist its effects, which ironically only makes Do-S more obsessed with breaking them due to her domineering personality.
• You Have Failed Me: She nearly got the same fate as Awakened Cockroach for running away from her battle, but Psykos convinced Orochi to let her live since there was still use of her powers.

Awakened Cockroach

Awakened Cockroach

Voiced by: Naoya Nosaka (Japanese), Joe Zieja (English)

Debut: Chapter 63 (Manga), Episode 18 (Anime)

Disaster Level: Demon

A humanoid cockroach who fights Genos in C-City during the Monster Raid arc.

---

• Ain't Too Proud to Beg: He was screaming for mercy, only for Orochi to eat him alive.
• An Arm and a Leg: To escape from Genos, he looses both of his legs when they get glued to to the ground.
• Dub Name Change: In the Viz translation he's called "Roach Awakening".
• Life-or-Limb Decision: When Genos blocks his movement, he sacrifices his feet to get away.
• Multi-Armed and Dangerous: Has eight limbs, six are arms.
• Oh, Crap!: When Genos stopped him and was about to destroy him.
• Smug Super: Awakened Cockroach is confident in his abilities. He prefers targeting heroes in contrast to other monsters, and gave Genos a run for his money.
• Spider-Sense: His senses are far beyond the norm. Even if his opponent could attack at the speed of light, he/she still would not be able to hit him because his body developed a sixth sense; being able to sense killing intent and dodges attacks on its own in advance.
• Super-Speed: He possesses an incredible amount of speed and sharp reflexes, being able to fight on par with Genos.
• You Have Failed Me: Because he ran away from Genos, Orochi ate him alive in front of all the monsters at a meeting to show the others how he will treat cowardice amongst his followers.

Face Ripper

Face Ripper

Voiced by: Yuya Murakami (Japanese), Patrick Seitz (English)

Debut: Chapter 63 (Manga), Episode 18 (Anime)

Disaster Level: Demon

A monster made of skinned faces who attacks C-City during the Monster Raid Arc.

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• Dual Wielding: Uses a pair of giant swords to great effect.
• Humanoid Abomination: He has the appearance of a large monster with stitched faces covering his entire body.
• Sadist: Face Ripper is a sadistic monster, taking pleasure in taking peoples faces.
• Slasher Smile: On all his faces.
• Tear Off Your Face: What he does to his victim, as his name says.

One-Hundred-Eyes Octopus

One-Hundred Eyes Octopus

Debut: Chapter 58 (Manga), Episode 17 (Anime)

Disaster Level: Demon

A gigantic octopus monster that wreaks havoc in I-City during the Monster Raid Arc.

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• Attack Its Weak Point: His skin is almost impossible to pierce, and the heroes noted only its eyes are vulnerable.
• Attack of the 50-Foot Whatever: Is bigger than the buildings.
• Cruel and Unusual Death: Tatsumaki gets around the fact his skin is practically undamageable by crushing him into a compact ball with her telekinesis, essentially destroying his insides.
• Dub Name Change: Sometimes translated at "Hundred-Eyes Octopus", or just "Multi-Eyed Octopus" in the Viz translation.
• Extra Eyes: Has hundreds of eyes.
• Eyes Do Not Belong There: Has eyes all over its body including under the tentacles.
• Eye Scream: Flashy Flash slashed all his eyes in an instant. Leading him to go in an Unstoppable Rage.
• Miracle-Gro Monster: The more buildings he eats, the bigger he gets. Tatsumaki defeats him by shrinking him back down...in a fashion.
• No-Sell: No attack can damage his skin (except Tatsumaki), see Attack Its Weak Point above.

Rhino Wrestler

Rhino Wrestler

Voiced by: Ryou Sugisaki (Japanese), Richard Epcar (English)

Debut: Chapter 58 (Manga), Episode 17 (Anime)

Disaster Level: Demon (Formerly Tiger)

A rhino monster who works as middle management in the Monster Association.

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• Blood Knight: He wants a Worthy Opponent to show off his strength. Was disappointed when the heroes he found were too weak.
• Combat Commentator: He enjoys giving scores to every attack against him.
• Elite Mook: Was apparently first ranked as Tiger with a lot of the other monsters, but Gyoro Gyoro later notes he became strong enough to classify as Demon-level, and proves it by dominating in his fight with all the lower ranked Heroes hand picked for the rescue mission up to Iairon as the second ranked A class. It takes Atomic Samurai stepping in to kill him.
• Rhino Rampage: He's some sort of rhino monster.
• Smug Super: He scoffs at other monsters discussing the benefits of battle matchups, claiming that he can just brute force anything in his way.
• Super-Strength: Is incredibly strong, able to make a giant punching bag made of giant tires and chains rock with each blow and then ram clean through it.
• Super-Toughness: None of the A to C-class heroes (who fared pretty well against a horde of fodder monsters) do much damage to him.
• Unwitting Pawn: Gyoro Gyoro apparently encouraged him to charge right at the Heroes, and assured he'd even be a match for the S-ranked ones. Naturally, he dies as soon as one fights him, and this was all seemingly so that Gyoro Gyoro could observe the Heroes, and come up with the best way to use the Dragon-level monsters.
• Wrestler in All of Us: His name gives this.
• You Are Already Dead: He was on the receiving end of this by none other than Atomic Samurai. He even gives him a score of 100 before he turns into Ludicrous Gibs.

Free Hugger

Free Hugger

Debut: Chapter 59 (Manga)

Disaster Level: Demon

A porcupine monster who is killed by Puri-Puri Prisoner.

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• Combat Sadomasochist: Not the monster itself, but the solution Puri Puri Prisoner comes up with to beat him is to give a crushing hug and just love the pain it causes.
• Schmuck Bait: A giant porcupine with a sign that says free hugs.
• Stone Wall: He never actively does anything, but stand around and let his enemy injure themselves on his sharp hair when punching him.
• Spikes of Villainy: His hair covers most of his body to stick out into hundreds of razor sharp spikes.
• Stating the Simple Solution: Many normal citizens observe how Puri Puri Prisoner could win easily if he simply attacked with the ball and chain he still has instead of punching Free Hugger. Unfortunately they're too far away for the S-Class Hero to properly hear them, and he comes up with another solution instead.

Pureblood

Pureblood

Voiced by: Uncredited (Japanese), Doug Erholtz (English)

Debut: Chapter 60 (Webcomic), Chapter 59 (Manga), Episode 17 (Anime)

Disaster Level: Demon

A pureblooded vampire who takes great pride in his monstrous heritage.

---

• Animal Motifs: Bats.
• Art Evolution: In his first brief appearance, his Victorian clothes, hair style, and facial structure were a more classical depiction of a Vampire. In later scenes his clothes change to a more sinister look and his hair becomes more wild to give him a more fiendish appearance.
• Asshole Victim: Really any monster is this for spreading destruction and killing innocent civillians, but here even monsters themselves couldn't stand him and don't care about his fate.
• Bad Boss: Uses other monsters to replenish himself.
• Blade Below the Shoulder: He has two large ones which resemble bat wings.
• Bullet Catch: Apparently quite common. And he can fire them back using his fingers.
• Dub Name Change: Called "Pedigreed" in the Viz translation.
• Fantastic Racism: He thinks that transformed monsters are inferior to true born monsters like himself, seeking to kill them off too after dealing with the heroes. The other monsters, in return, despise him and were actually hoping Zombieman would kill him.
• Hated by All: With his tendency to feed on monsters and extreme arrogance, none of the other monsters likes him. It's even to the point that when Zombieman shows up, a crowd of them lets the hero through without a fight in the hopes the S-Class will kill him for them.
• Knight of Cerebus: Downplayed, as he's only a side character in Monster Raid arc, but it's the first time in the series where victims of monsters are showcased, with the large pile of deceased humans set behind him.
• Lightning Bruiser: Fast enough to dodge and catch Zombieman's attacks and strong enough to tear him asunder with a direct hit.
• Off with His Head!: How he was defeated, though he could still talk afterwards briefly before expiring.
• One to Million to One: He can turn himself into thousands of bats.
• Our Vampires Are Different: He was born a monster, apparently, and looks down upon other monsters, especially former humans. He claims to be the descendant of a long line of vampires.
• Team Killer: Eats few other monsters to heal himself in needing for blood.
• Vampiric Draining: He can heal himself by draining the blood of others.
• Victory by Endurance: The only reason why Zombieman managed to defeat him. Pureblood is stronger and faster than the S-Class Hero, even possessing a powerful Healing Factor of his own, but that doesn't help when your opponent is practically immortal. 30 minutes of constant fighting and after 200 consecutive victories for Pureblood, Zombieman manages to defeat him.

Fist Fight Djinn

Fist Fight Djinn

Voiced by: Uncredited (Japanese), Jarred Kjack (English)

Debut: Chapter 60 (Manga), Episode 17 (Anime)

Disaster Level: Demon

A former boxer who turned into a monster due to his violent urges.

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• Arrogant Kung-Fu Guy: As a human, he participated in many tournaments but it did not satisfy his bloodlust. After turning into a monster, he became even more overconfident in his abilities.
• Blood Knight: He was once a boxer who lusted for power so much that he turned into a monster.
• Curb-Stomp Battle: He thought he could take on Bang and got turned into a lifeless pile before he could land a hit on him.
• Dub Name Change: The Viz translation calls him "Demonic Pugilist".
• Foil: Of the Bit Character variety. He explains how his cruelty in combat led to him mutating into a monster, which Bang interprets as a similar phenomenon to Garou's rampage.
• Motive Rant: Gives one when he introduces himself to Silver Fang, right before his death.
• Multi-Armed and Dangerous: He has 4 arms.
• There Is No Kill Like Overkill: Bang could've easily dispose of him with one attack, but he uses Rapid-Fire Fisticuffs instead, leaving the monster in heavily beaten state.
• We Hardly Knew You: Before we can see how he fights, Djinn gets obliterated by Bang.

The Three Crows

The Three Crows

Debut: Chapter 71 (Manga), Episode 20 (Anime)

Disaster Level: Demon

Three crow monsters who were formerly Gouketsu's martial arts disciples.

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• Bird People: Were once martial arts disciples of Gouketsu, but all three became giant humanoid crows upon monsterization.
• I'm a Humanitarian: Noted by Gouketsu to have a love of eating martial artists.
• Was Once a Man: Gouketsu says that they were once humans who consumed Monster Cells, but eventually their monstrous nature overcame them and they lost their minds. Now they're little more than animals trained to follow Gouketsu's orders.
• Worf Effect: Get taken out rather quickly by Lightning Max, Snake Snek, and an injured Suiryu.

Royal Ripper

Royal Ripper

Debut: Chapter 55 (Webcomic), Chapter 86 (Manga)

Disaster Level: Demon

An especially sadistic monster whose body is made of gauze and hair. He is sent to supervise Garou, and ends up kidnapping Tareo.

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• Abnormal Limb Rotation Range: He can rotate his arms more than 360°.
• Ax-Crazy: Loves to cut up people, especially children, for fun.
• Blade Below the Shoulder: His forearms are long blades.
• Curb-Stomp Battle: After Garou recovers from his near-death experience and breaks back into the Monster Association, Royal Ripper loses in seconds once they clash. Granted, part of it can be chalked up to Garou's surprise attack, but given how easily he destroyed Ripper's arm blades, it likely would have ended just as quickly had they faced off fair and square.
• Death by Irony: Garou disposes of him by slicing him to pieces with his Whirlwind Iron-Cutting Fist.
• The Dreaded: Tareo, the young hero fanboy that Garou sometimes hangs out with, immediately recognized him from the monster section of the hero catalog, and begins hysterically crying.
• Dub Name Change: Called "King the Ripper" in the Viz translation, which makes the original Japanese name's pun on "Jack the Ripper" more clear.
• Early-Bird Cameo: A picture of him appeared in the urban legend monster section of the hero catalog of Tareo in Chapter 49.
• Evil Versus Evil: Often butts heads with Garou, and begins a fight with him in Chapter 134.
• Not Bad: After spending so much time mocking Garou, he admits that he's actually strong after they fight...for a human.
• Red Oni: Acts as this to Bug God's Blue Oni. He is incredibly impulsive and deranged, even choosing to kidnap Tareo outside Gyoro Gyoro's orders.
• Stringy Haired Ghost Guy: His hair is long, wild, and wispy.
• Sadist: Has an obsessive compulsion to torture and kill, but is most fond of killing kids.
• Tempting Fate: Is convinced Garou is dead after having slashed him multiple times. We know this won't end well...and sure enough, it does not when Garou comes calling to collect Tareo.
• The Worf Effect: An interesting example. When he and Garou clash (with Bug God backing Ripper up, admittedly), it's a pretty even fight, albeit with Garou on the losing end. After Garou recovers from his near death experience and gets his power boost, Royal Ripper is quite literally tore apart in Round 2 once Garou finds him again.
• Would Hurt a Child: He especially loves to target children, and was about to cut up Tareo before Garou got to him. It's implied he did this many times before, as he gets a notion in a section of Hero Book Tareo has.

G5

G5

Debut: Chapter 86 (Manga)

Disaster Level: Demon

A samurai-style Battle Machine God created by the Organization, sent to join the Monster Association.

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• Awesomeness by Analysis: Can scan and copy Atomic Samurai's swordplay; allowing him to keep up with the S-Class Hero. At least for a little while.
• Enigmatic Minion: Openly states to being a part of another mysterious organization with their own goals when joining the Monster Association.
• Extendable Arms: Displayed the ability to stretch its arms across a corridor to throw a random monster for Great Food Tub to eat.
• Katanas Are Just Better: Is shown with two of them.
• Killer Robot: Is what it appears to be.
• Know When to Fold Them: When his outer-shell gets sliced to pieces by Atomic Samurai, his core body retreats through the smoke and disappears before it can be seen.
• Meta Mecha: Like G4, he's actually a smaller robot piloting a larger mech suit. In fact, Genos notes it's actually an upgraded model from G4, though he has no trouble finishing it off considering his own considerable upgrades.
• No-Nonsense Nemesis: Unlike his G4 predecessor's challenge to King, G5 doesn't waste any time when he comes across Child Emperor and the hostage. He just attempts to eliminate the enemy once he identifies them.
• No-Sell: First gets shot off-screen by Child Emperor's miniature tank automation and destroys it while coming around the corner seemingly unharmed. Then it lets him set up his Bug Net electrical trap designed for nullifying robots and cuts through the entire thing after letting it shock him with no signs of being affected, prompting a legitimate Oh, Crap! from Child Emperor for the first time. Child Emperor has to bring out his Mad Dog: Underground Cerberus robot and fire several missiles that coat G5 in sticky fluid to slow him just to pull a retreat.
• Samurai: Has this as a general design.
• Spikes of Villainy: Is an evil robot with a samurai motif that rivals the Shredder in sharp-edged design.
• Team Killer: Discussed with Gyoro Gyoro. When G5 asks the leader if it's fair for other monsters to kill their fellow members, he replies that while it's not exactly forbidden, it's better not do it so their count won't be decreased, though given monster's nature, it's sometimes allowed without overdoing it. Later invoked when G5 hands over the monster to Great Food Taber in self-defense.
• Underestimating Badassery: Averted. It actually thought it was being looked down upon when Child Emperor sent Mad Dog: Underground Cerberus to fight it, but then the hero fires several mini-missiles that cover it in sticky slime all to delay it enough for them to run away.
  • Then he later underestimates Atomic Samurai's badassery and his outer shell is easily cut to shreds before he manages to retreat.

Bug God

Bug God

Debut: Chapter 54 (Webcomic), Chapter 86 (Manga)

Disaster Level: Demon

An insectoid monster who works with Royal Ripper to supervise Garou.

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• Big Creepy-Crawlies: He's a humanoid insect that towers over most humans.
• Blue Oni: Acts as this to Royal Ripper's Red Oni, being much more level-headed and obedient to Gyoro Gyoro. He still has his impulsive and murderous side though.
• Curb-Stomp Battle: Receives one thanks to Superalloy Darkshine. The latter withstands all of Bug God's attacks entirely unscratched and retaliates with a One-Hit Kill.
• Dub Name Change: Called "Insect God" in the Viz translations.
• Extra Eyes: Has five of them.
• Multi-Armed and Dangerous. Grows 4 more arms along in his One-Winged Angel form along with his standard pair.
• No-Sell: Tanks both Garou's hits and Royal Ripper's redirected slashes without taking a scratch.
  • Subverted with Superalloy Darkshine tanking Bug God's attacks and killing him with a single blow.
• One-Winged Angel: He transforms into a bigger more insectoid monster when fighting Darkshine. Not that this helped him any.
• Smug Super: Incredibly confident in his strength, believing that monsters on the whole are superior to humans and that throwing away their humanity was a necessity for their greater power.
• Super-Strength: He can overpower Garou with ease, slamming him into the pavement and throwing him a considerable distance in the air. However, he is still outmatched due to the latter's superior speed and skill.
• Super-Toughness: He is one of the more durable Demon-level monsters.
• Underestimating Badassery: He believed he alone would not only be enough to defeat Superalloy Darkshine, but would easily overpower the S-Class Hero. As it turns out, it was Darkshine who would easily overpower him.

The Great Food Tub

The Great Food Tub

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

Disaster Level: Demon

A gluttonous bearded dragon monster.

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• Dub Name Change: Simply named "Big Eater" in the Viz translation.
• Just Eat Him: Threatened this on all the heroes, and was ultimately on the receiving end from Pig God.
• Lizard Folk: Appears to be a giant humanoid bearded dragon.
• Team Killer: To tame his hunger, G5 gives him one of the monsters to eat in self-defense.
• Villainous Glutton: It seems to always be hungry and will eat anything, even other members of the Monster Association.
• We Hardly Knew Ye: One of the least shown Demon-level members of the Monster Association, both in webcomic and the manga, killed off in several panels by Pig God in all adaptations.

Devil Long Hair

Devil Long Hair

Debut: Chapter 58 (Webcomic), Chapter 89 (Manga)

Disaster Level: Demon

A man so obsessed with his hair that he became a monster.

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• Agent Peacock: Dresses and speaks in a flamboyant manner.
• Combat Pragmatist: Will hide his hair under rubble and attack using his enemies blind spots when fighting Atomic Samurai's apprentices. When that doesn't work, he abandons subtlety, and tries to overwhelm them by attacking from all directions at once.
• Dub Name Change: Called "Malong Hair" in the Viz translation.
• Prehensile Hair: He can use it like Combat Tentacles, piercing enemies or blocking their attacks with just his hair.
• Uncertain Doom: Has all his hair cuts off and faints. It's unknown if he actually died or if his hair being cut off was even a weakness or just him being a drama queen. Since the Monster HQ collapses after that, he was probably buried alive.
• Weaksauce Weakness: Having his hair cut. Getting all of his chopped off in his battle with Atomic Samurai's apprentices ultimately defeats him.

Baquma

Baquma / Vacuuma

Debut: Chapter 105 (Manga)

Disaster Level: Demon

An elephant monster who can steal the powers of fellow monsters.

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• Beam Spam: His second attempt at blasting Puri-Puri Prisoner involved just shooting him with multiple powers from his trunks.
• Cruel Elephant: An elephant monster who's also arrogant, over-confident and not much of a team player to boot.
• Curb-Stomp Battle: Doesn't even wound Puri-Puri Prisoner in any fashion and is taken out in one hit.
• Hour of Power: After he sucks up a monster, he can use its powers until he eventually has to excrete it.
• Killed Mid-Sentence: (To Puri-Puri Prisoner) "You really are a monst—!!!"
• Ludicrous Gibs: Turned into utter chunks when his by Puri-Puri Prisoner's Dark Angel Rush attack.
• Multi-Armed and Dangerous: Grows multiple arms after sucking up some of the Tiger-level monsters.
• One-Winged Angel: After sucking in some Tiger-level monster. He grows bigger, darker looking and grows two extra sets of arms.
• Power Copying: After sucking some of the Tiger-level monsters into his trunk, he takes on their abilities as well.
• Sharp-Dressed Man: Has a stylish suit, cane, and scarf. His original design had poofy pants and curled shoes; much less refined and more like a genie.
• Team Killer: Has no problem "eating" other monster just to power himself up.
• Underestimating Badassery: Called the Tiger-level monster weaklings just because they had the common sense to run from a hero that they combined couldn't harm with their powers. His approach, to suck them all up into himself and use their power, isn't any different and he gets taken down by Puri-Puri Prisoner without even putting up a fight.

Centisenpai

Centisenpai

Voiced by: Hiromichi Tezuka (Japanese), Imari Williams (English)

Debut: Chapter 56 (Webcomic), Chapter 54 (Manga), Episode 16 (Anime)

Disaster Level: Demon

A large centipede monster who is a level above Centikohai.

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• Always a Bigger Fish: After Centikohai is killed by Metal Bat, Centisempai emerges. And of course, Centichoro shows up after Centisempai is killed.
• Big Creepy-Crawlies: Centisenpai is a tall as a building.
• Body Horror: Centisenpai has 2 humanoid faces, with one inside another's mouth.
• Creepy Centipedes: If being oversized centipedes wasn't enough for you, these guys come with disturbing faces.
• Dub Name Change: His fan-translated name was "Senior Centipede", but the Viz translation is "Centisenpai".
• Multi-Armed and Dangerous: Goes without saying as it is a giant centipede monster.
  • It attacked Metal Bat by coiling around him, kicking him repeatedly with successive legs.
• Too Long; Didn't Dub: Just like all the centipede monsters in the official translation. At least it's slightly lessened for the younger two since senpai/kohai is a popular concept.

Showerhead, Super Mouse & Unihorn

Showerhead, Super Mouse & Unihorn

Debut: Chapter 90 (Manga)

Disaster Level: Demon

Showerhead

Super Mouse

Unihorn

A trio of Demon-level monsters who obstruct Garou and Tareo's escape.

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• All Your Powers Combined: Their combined attack, the Triple Demon Blasting Speed Thrust, involves Super Mouse throwing a transformed Unihorn and Showerhead augmenting the speed with a jet of water.
• Animal Testing: Super Mouse was a lab rat who got experimented on until he became a monster and broke free.
• Curb-Stomp Battle: The trio couldn't do anything against Garou, who overpowered them with ease. In the end, they all got wiped out by Overgrown Rover.
• Eyes Do Not Belong There: Unihorn has a ton of eyes all over himself.
• Good Thing You Can Heal: Super Mouse can regenerate from most wounds, capable of healing after Garou sliced him to pieces with his Whirlwind Iron-Cutting Fist.
  • Unfortunately he couldn't heal from being vaporized by Overgrown Rover's energy blast.
• Made of Iron: Unihorn boasts that he is unbreakable. While he doesn't get damaged by Garou, Overgrown Rover chewed him to bits.
• Making a Splash: Showerhead can spray any liquid and can control its temperature as well.
• Rat Man: Super Mouse is a hulking humanoid rat.
• Spin Attack: Unihorn attacks Garou by spinning rapidly like a buzzsaw.
• Villainous Friendship: Unlike most of the other monsters who are at heads with each other, these three seem to be genuine friends.

Tiger-Level Members

Sludge Jellyfish

Sludge Jellyfish

Voiced by: Tadanori Date (Japanese), Jason Marnocha (English)

Debut: Chapter 58 (Manga), Episode 17 (Anime)

Disaster Level: Tiger

A sludge monster with a penchant for torturing children.

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• Blob Monster: Is a monster made of sludge.
• Combat Tentacles: Has a few to capture it's prey.
• Dub Name Change: Called "Hedro-Jellyfish" in the Viz translation.
• Kill It with Fire: After Child Emperor fails to kill him by slicing him up, the Hero pumps him with flammable liquid and lights a match to set him a blaze. He manages to survive this, but then he makes the mistake of getting into the fight between Child Emperor and Evil Natural Water...
• Small Role, Big Impact: He captures Tareo while Garou is distracted by Royal Ripper and Bug God, and takes him back to the Monster Association's base. This basically is the catalyst that insures Garou remains involved in events, and continually puts him into conflict to develop into a monster himself as Gyoro Gyoro desires.
• Smug Super: Not so much proud of himself, as much as the Monster Association itself. Boasting to the two captive children, that between the Executives and Lord Orochi the monsters have nothing to fear from even the strongest S Class Heroes.
• Super-Toughness: Lampshaded by Garou when he throws a punch from the above to smash him. Later he survives even Child Emperor's both attacks. Not bad for a tiger-level monster.
• Would Hurt a Child: As a monster he has no qualms about capturing Tareo, or battling Child Emperor. He even attempted to take Zenko hostage, only for Garou to attack him from behind.
• You Will Be Assimilated: Is killed when Evil Natural Water drains the oil out of his body to lower its own freezing point and render itself immune to Child Emperor's freezing attacks, killing him.

Marshall Gorilla

Marshall Gorilla

Voiced by: Soshiro Hoshi (Japanese), Brock Powell (English)

Debut: Chapter 59 (Manga), Episode 17 (Anime)

Disaster Level: Tiger

A gorilla monster who prides himself as a soldier.

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• Almighty Janitor: In a sense, he considers himself more dangerous than a Tiger-level threat, and defeats an A-Class hero with no difficulty. Since Armored Gorilla (who was easily defeated by Genos, an S-Class hero) defeats him in one punch, likely, he's just a case of Small Name, Big Ego.
• Curb-Stomp Battle: He defeats Heavy Kong without getting any injury, and is later defeated by Armored Gorilla with a single punch.
• Dual Wield: He fights using a pair of knives.
• Foil: To Armored Gorilla. Both are big apes who spread havoc, but Armored Gorilla commited a Heel–Face Turn and tries to fit into human society for his creator Dr Genus, while Marshall Gorilla is not happy at all with idea of fitting into human's mundane activities. Additionally, one is a monsterized ape and the other is a cyborg.
• Killer Gorilla: He's a monster who has the appearance of a gorilla in an army suit.
• Glory Hound: He says that will not stop defeating heroes until he gets promoted to a Demon-level threat.
• Good Smoking, Evil Smoking: He's an evil monster who is always smoking a cigar.
• No True Scotsman: Marshall Gorilla considers Armored Gorilla a traitor to the gorilla monsters because the latter lives peacefully in human society.
• Stock Animal Diet: Marshall Gorilla is an ape-like monster and has a bandolier with bananas tied to it, but they're actually empty peels that contain his cigars.
• What Happened to the Mouse?: It wasn't revealed what happen to him after his confrontation with Armored Gorilla. It can be assumed however that he was taken to Hero Association's prison for monsters, just like Tongue Stretcher.

Maiko Plasma & Electric Catfish Man

Maiko Plasma & Electric Catfish Man

Maiko Plasma Voiced by: Risa Tsumugi (Japanese), Lauren Landa (English)

Electric Catfish Man Voiced by: Uncredited (Japanese), Patrick Seitz (English)

Debut: Chapter 59 (Manga), Episode 17 (Anime)

Disaster Level: Tiger

Maiko Plasma

Electric Catfish Man

A pair of electricity-based monsters who share a strong bond.

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• Art Evolution: The revised version features them, and several other lower level monsters, with much more detailed appearances; being less cartoony overall.
• Curb-Stomp Battle: Both took out Lightning Genji, an A Class Hero, without any trouble mostly due to their own electric powers rendering his useless.
• Cute Monster Girl: Maiko Plasma who is a monster that looks like an attractive geisha.
• Even Evil Has Loved Ones: They unlike the other monsters in association, certainly love and care for each other.
• Fish People: Is more fish than man in Catfish's case; being basically a human sized fish with human limbs instead of fins.
• Lady of War: Maiko Plasma. A monster with a hostess appearance, and willing to battle Heroes with her notable electric power.
• No-Sell: To any electrical attacks, due to their own electric abilities.
• Shock and Awe: Both Maiko Plasma and Electric Catfish Man wield considerable electrical power. It's the reason both were specifically sent after Lightning Genji as it allowed them to counter his own electric abilities.
• Stripperiffic: Maiko Plasma's redesigned outfit.
• Unholy Matrimony: In the revised version of their fight with Puri Puri Prisoner, they refer to each other like a couple.
• What Happened to the Mouse?: They, along with several other monsters, survived being eaten by Vacuuma. Deciding things are getting a little too hairy, the couple decide to run from the battle and have yet to be seen again.
• You Will Be Assimilated: They, along with several other Tiger-level monsters, try to run from Puri Puri Prisoner after their attacks fail to hurt him, but Vacuuma decides to punish them for their cowardice by sucking them up and absorbing their powers to strengthen himself. They supposedly met their end when Vaccuma was punched into chunks along with him.
  • Averted in a revised version where only Maiko is eaten, and is promptly saved when Puri Puri Prisoner obliterates Vaccuma, not having enough time to digest all the monsters he ate.

Mad Doctor Fish

Mad Doctor Fish

Debut: Chapter 114 (Manga)

Disaster Level: Tiger

A school of carnivorous fish that dwell within Evil Natural Water.

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• Piranha Problem: They're a bunch of bloodthirsty fish capable of quickly swarming and tearing apart their foes.
• Not Quite Flight: If people are nearby, but don't cause Evil Natural Water to attack them due to having no hostility, the fish will jump out of Evil Natural Water to attack themselves. Which will cause Evil Natural Water to attack those who attack the fish when defending themselves.
• Red Herring: Atomic Samurai's disciples originally believe they're the Monster Association Executive, but Iairon easily cuts the fishes down and they quickly realize the real Executive is the very water they were residing inside of.

Destrochloridium

Destrochloridium

Voiced by: Hiromichi Tezuka (Japanese), Sean Chiplock (English)

Debut: Chapter 79 (Manga)

Disaster Level: Tiger

A parasite monster who can take over people's bodies.

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• Meat Puppet: It uses human bodies as this, though only one at a time.
• Mind-Control Eyes: Its victim's eyes appear blank, with an additional pair of eyes on stalks bursting through the skull.
• Puppeteer Parasite: It enters its host bodies and takes complete control of them.
• This Is a Drill: Its hands are drills that can pierce through steel. It uses them to enter host bodies.

Unknown Disaster-Level Members

Evil Eye

Evil Eye

Debut: Chapter 94 (Manga)

Disaster Level: Unknown

A psychic monster who steals the powers of other psychics.

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• Black Cloak: A long one covers his entire body, resembling the The Grim Reaper.
• Curb-Stomp Battle: Unfortunately for him, Tatsumaki is way beyond his level.
• Death from Above: Throws entire apartment buildings at the heroes with his Psychic Powers.
• Eyes Do Not Belong There: His body is covered with eyes of dead monsters, planted by Gyoro Gyoro to amplify his powers.
• The Faceless: Its face is fully hidden beneath a cloak. Due to his short-lived Curb-Stomp Battle against Tatsumaki, likely, it will never be revealed.
• The Power of Hate: Why the eyes on his arms? The lingering hate of the dead monsters slain by Tatsumaki fuel his power, boosting his telekinesis. For all its worth, it allows him to lift buildings and not being instantly disintegrated by Tatsumaki herself.
• Psychic Powers: He uses particularly strong telekinesis.
• Youkai: His appearance is strongly reminiscent of the dodomeki, a somewhat obscure youkai that has long arms covered in eyes and is often depicted wearing a hooded cloak.

Gyoffrey

Gyoffrey

Voiced by: Taro Kiuchi(Japanese), Jason Marnocha (English)

Debut: Chapter 70 (Manga)

Disaster Level: Unknown

An obese fish monster who fancies himself the new king of the sea.

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• Fish People: Is a fat man-sized fish person.
• Meaningful Name: "Gyo" means fish.
• Opportunistic Bastard: Attacked a hospital filled with wounded Heroes to take the credit for finishing them off. Fortunately, he was stopped by Mumen Rider and Tank Top Master.

Venus Mantrap

Venus Mantrap

Voiced by: Uncredited (Japanese), Ryou Sugisaki (English)

Debut: Chapter 51 (Manga)

Disaster Level: Unknown

A plant monster sent to kidnap Waganma.

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• Dub Name Change: Called "Venus Peopletrap" in the Viz translation. Gender equality!
• Man-Eating Plant: As it's name and appearance implies, it's a Venus Flytrap monster that presumably eats people.
• Plant Person: A plant monster that resembles a Venus flytrap.
• We Hardly Knew Ye: Little is known about him as soon as he made his debut.
• The Worf Effect: One of the first monsters affiliated with the Monster Association to appear alongside Centikohai. He gets brutally killed off-panel by Metal Bat shortly after.

Centikohai

Centikohai

Voiced by: Takahiro Yamaguchi (Japanese), Joshua Tomar (English)

Debut: Chapter 51 (Manga)

Disaster Level: Unknown

The smallest of the centipede trio, sent to kidnap Waganma.

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• Always a Bigger Fish: Just before he dies, he informs Metal Bat that he once thought he was the strongest, too. Then he discovered that there is always someone bigger and stronger. Cue Centisempai. And it becomes especially meaningful when Centichoro appears.
• Big Creepy-Crawlies: Centikohai is big enough to tower over people.
• Body Horror: Centikohai has a single grotesque humanoid face.
• Creepy Centipedes: Is the first of a line of giant centipedes to appear, with each becoming bigger and stronger after the other.
• Dub Name Change: His fan-translated name was "Junior Centipede", but his official one is "Centikohai".
• Multi-Armed and Dangerous: Goes without saying as it is a giant centipede monster.
• Too Long; Didn't Dub: Just like all the centipede monsters in the official translation. At least it's slightly lessened for the younger two since senpai/kohai is a popular concept.
• The Worf Effect: Is one of the first monsters affiliated with the Monster Association to appear alongside Venus Mantrap, and the first of the giant centipede line. He gets brutally killed off-panel by Metal Bat shortly after.

Manako

Manako

Debuted: Chapter 122 (Manga)

A cyclops monster who was minding her own business until Saitama and Flashy Flash took her hostage as a guide to the Monster King.

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• Butt-Monkey: Played with. She's being dragged around by Saitama and Flashy Flash against her will and prone to suffering slapstick, but if it wasn't for their presence she would have already died from either being absorbed by Orochi or crushed by the Monster Association HQ being raised out of the earth by Tatsumaki.
• By the Lights of Their Eyes: She can emit a beam of light from her eye to illuminate her surroundings, and has a variety of modes she can switch between by pushing down on her horns in various combinations, including searchlight, thermostat, and X-ray.
• Canon Foreigner: She's completely absent from Saitama and Flash misadventures during Monster Association Arc in the webcomic.
• Cephalothorax: She's basically a gender-swapped Mike Wazowski, as in she's a Cyclops with a pair of short horns, and an entire body that is basically a ball with arms and legs attached, with her face taking up the entire "ball."
• Character Development: Despite following Monster Assocation rules at first and wanting to get rid of Saitama and Flashy Flash, Manako eventually bonds with them and enjoys their company, though she's still loyal to Orochi and Association, possibly because she still thinks he wasn't defeated.
• Cute Monster Girl: Downplayed, but in comparison to most of the monsters here, she's quite adorable, in a certain light.
• Dub Name Change: Called "Oculette" in the Viz translation.
• Female Monster Surprise: Saitama, Flashy Flash, and the readers wouldn't have realized she was a girl until she opened her mouth and Saitama idly noted her name sounded feminine.
• Lovable Coward: The ones she does seem to respect are purely because of the fear of being killed, though she is portrayed in a rather sympathetic light, unlike other monsters.
• Minion with an F in Evil: She's one of the many Mooks inside the Monster Association, but she is nowhere near as malicious as any of them. Hell, she even helped Saitama removing the rocks trapping Flashy Flash and showed him a technique to stave off hunger, though it was more because of the inherent fear that he might kill her.
• Split at Birth: She is actually sentient a piece of the Gyoro Gyoro monster body that budded off while it was incubating.
• Taking You with Me: She tried to pull this off by crashing the minecart that she, Saitama and Flashy were in down the ravine, but promptly chickened out once she saw how deep it is down there.
• Token Good Teammate: Downplayed, as she is still a monster, but in comparison to other monsters, Manako is a rather friendly being.
• What Happened to the Mouse?: After Awakened Cosmic Garou has been defeated, the last we see from her is her running away from battlefield and bleeding out from radiation. Flashy Flash so far has been looking for her, hunting down random monsters asking about her state.
  • He does find her eventually, and takes her to the Hero Association.

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