History Characters / MyHeroAcademiaAllForOne

* EveryoneHasStandards: {{Discussed}}. As he notes to Hawks, even in a world such as theirs with [[GrayAndGreyMorality differing cultures and views]] on what defines 'good' and 'evil', there are still some actions that are held to be universally repugnant or vile by everybody... so he wants to commit as many of those actions on as grand a scale as possible just so everyone who hears his name will consider him an evil villain, as he judges the success of one's villainy to be measured by how much they're [[HatedByAll despised by the masses]].

* ZeroPercentApprovalRating: Let's be clear: [[HatedByAll barely anybody actually LIKES All For One.]] The only ones shown wholeheartedly supporting him are demonstrated to be [[UndyingLoyalty mentally]] [[MadScientist unbalanced]] in their own ways, and their support comes across more as him manipulating their attachment to him. His rampant narcissism and determination to ruin the life of almost ''anybody'' he comes into contact with show he's a cartoonishly evil and insipid man obsessed with enacting his MaouTheDemonKing fantasies without a thought for anybody it might hurt -- in fact, he ''delights'' in spending time [[{{Sadist}} creatively finding means to makes as many people as possible suffer]], just [[ForTheEvulz for the sake of hurting them]], and reacts with ecstatic glee at any bare-faced animosity expressed towards him. What's more, his overarching goal isn't so much to be the WorldsStrongestMan as it is to be so utterly reviled he is recognized as the ultimate villain. Ironically, of all characters, [[TheManInFrontOfTheMan it's Shigaraki]] [[BastardUnderstudy who doesn't]] [[EvilerThanThou let him get away with it]]. It's telling that by the FinalBattle, Garaki is the ''only'' minion he has remaining that's actually genuinely still loyal to him.

** His pathological obsession with One For All has screwed him over repeatedly because no matter how much of a pragmatic move just killing its bearers when it was still week would've been, he simply couldn't stand doing so before he had the chance to steal it.

* HeroKiller: He and his followers have become infamous for killing any heroes who try to stop them. When he starts taking the field in the latter parts of the story, at least one known hero meets their end at his hands. This is especially true of the holders of One For All: before All Might defeated him in their battle, he killed each of the wielders as soon as they had passed it on, with only Hikage Shinomori, the fourth user, managing to evade him long enough to die of premature aging.

** When he uses Rewind to revert to his prime, his narcissism means he both can't resist wasting his now limited time relishing in his restored body, bragging about his raw power, and letting those who have already bruised his gigantic ego continue to get a rise out of him and further distract him. All Might specifically exploits this to delay him reaching Izuku when all other attempts at forcibly stopping him weren't quite enough, by giving him a target he ''can't'' resist destroying even with his scant remaining time almost having run out. All For One's inner monolog shows he's well aware of what All Might is doing, but still can't resist the urge to mangle him.

** When he uses Rewind to revert to his prime, his narcissism means he both can't resist wasting his now limited time relishing in his restored body, bragging about his raw power, and letting those who have already bruised his gigantic ego continue to get a rise out of him and further distract him. All Might specifically exploits this to delay him reaching Izuku when all other attempts at forcibly stopping him weren't quite enough, by giving him a target he ''can't'' resist destroying even with his scant remaining time almost having run out.

** When All Might first talks about him, he brings up how he's ShroudedInMyth and the only knowledge about his existence as Japan's past ShadowDictator is rumors on the internet, emphasizing his [[NothingIsScarier unseen menace]] brought back by [[KnightOfCerebus his re-introduction]] into the present narrative. All Might even admits that he didn't talk about him before because [[NoOneCouldSurviveThat he thought he'd dealt with him for good]] and didn't see any reason to burden Izuku with the knowledge then. During the FinalBattle, this get thrown back in All For One's face to his detriment: far from his monstrous villainy making him [[TheDreaded a feared villain who terrorizes everyone]] and will be remembered forever in infamy, it just means that nobody ''wants'' to remember him or talk about him, and history books have intentionally ignored any recollection of him while retaining the relevant lessons from the Dark Age of Quirks, dooming All For One to being [[{{Unperson}} a non-entity in the grand scheme of history]].

* HeroKiller: He and his followers have become infamous for killing any heroes who try to stop them. When he starts taking the field in the latter parts of the story, at least one known hero meets their end at his hands. This is especially true of the holders of One For All: before All Might defeated him in their battle, he killed each of the wielders as soon as they had passed it on, with only Hikaga Shinomori, the fourth user, managing to evade him long enough to die of premature aging.

* SmugSuper: His arrogance, manipulative nature and outright malice are matched by a tremendous amount of power. {{Deconstructed}}, however: as powerful and competent All For One ''is'', he's not as invincible or infallible as he ''thinks'' he is. As a result, he genuinely believes he's already won and actually winning is a formality. This blows up in his face when a large part of the heroes' plan to trap and defeat him for good is simply to allow him to believe things are going exactly as planned, something All For One doesn't question because to him, that's the natural way for things to progress. This sees him completely blindsided when he learns too late that they're decidedly not and the trap is sprung.

* [[TheSociopath The Psychopath]]: Befitting one known as the Symbol of Evil, All For One carries all the traits of a classic psychopath: he has no empathy or remorse for all the things he has done, shamelessly bragging to his brother about how his followers had wiped out a faction of Quirk users who refused to join him. He views others as mere pawns to be used. He lies and manipulates others with ease. He's a {{Sadist}} who enjoys getting under other people's skin, often taunting All Might about the death of his mentor. He is incredibly arrogant and condescending to the point of megalomania and is charismatic enough to gain a loyal following of villains to serve under him. Even when he does something to help someone, it's never out of pure altruism and he always has an ulterior motive:

* HateSink: Once the mystique and [[TheDreaded aura of dread]] All For One cultivates is stripped away in the finale, all that's left for viewers is essentially a superpowered bully who lives according to a purely [[ItsAllAboutMe selfish]], [[PsychopathicManchild childish]], [[CannotTellFictionFromReality borderline-delusional]] desire to be the most despicable supervillain of all time. Even his own allies, in particular [[UndyingLoyalty Gigantomachia]], become disillusioned with him.

''Villains'': [[Characters/MyHeroAcademiaVillains Known Villains]] ([[Characters/MyHeroAcademiaLeagueOfVillains League of Villains]] ['''All For One''', [[Characters/MyHeroAcademiaTomuraShigaraki Tomura Shigaraki]], [[Characters/MyHeroAcademiaDabi Dabi]], [[Characters/MyHeroAcademiaHimikoToga Himiko Toga]], [[Characters/MyHeroAcademiaArtificialHumans Artificial Humans]]], [[Characters/MyHeroAcademiaShieHassaikai Shie Hassaikai]] [[[Characters/MyHeroAcademiaOverhaul Overhaul]]], [[Characters/MyHeroAcademiaMetaLiberationArmy Meta Liberation Army]], [[Characters/MyHeroAcademiaParanormalLiberationFront Paranormal Liberation Front]])\\

* {{Expy}}: All For One is one to both [[DarkLordOnLifeSupportDarth Vader]] and [[EvilOverlord Palpatine]] from Franchise/StarWars. Like the former, his body is damaged and as a result he wears a life support system; and he also has the trollish dick tendencies and evil mastermind skill of the latter.

** There are two things shown in the series actually capable of making All For One not just angry, but ''furious'': [[ControlFreak not being in control]] and having his self-image as the invincible Demon King [[NotSoInvincibleAfterAll undermined]]. While these would make anyone angry, All For One's nature makes them this trope for him specifically: as a {{Sociopath}}, his shallow emotions mean genuinely angering him is borderline impossible on a pathological level. This means not only do these things make him truly angry, but they're also seemingly the only two things in the world that ''can''. All his outward displays of furious rage can be linked back to these in some way or another, for example: He shed BerserkerTears and displayed uncharacteristic [[TranquilFury icy fury]] towards the Second holder of One For All, which persists even generations later, because his actions prevented him from forcing Yoichi to join him and demonstrated that all his accumulated power could not stop his 'possessions'' from being taken from him.

* TheBully: At his core, All For One is this. For all his power and influence, All For One is nothing more than a narcissistic, sociopathic bully who just wants to lord his power over everyone and everything, and constantly mocks and belittles anyone brave enough to challenge him. In particular, his hatred of All Might stems from him dismantling his criminal empire and ruining his image of himself as this all-powerful demon lord.

* ClassicVillain: A petty, sociopathic madman representing {{Greed}} and {{Pride}} to the extreme who is designed as the ultimate foil to All Might, Izuku, and the philosophy behind heroes as a whole.

** His [[EvilCannotComprehendGood inability to comprehend altruism]], on full display during his battle with All Might in Kamino Ward, plays into the later reveal that his sociopathic nature handicaps his ability to steal One For All. As he can't understand what it's like to care for something beyond your own wellbeing, he cannot grow as a character, and thus has remained the exact same CardCarryingJerkass for generations. This is why [[ManySpiritsInsideOfOne One For All]] can't be assimilated by his PowerParasite abilities, as it is comprised of people whose collective HeroicWillpower are too strong for him to ever overcome without a strong emotion like Shigaraki's hatred.

* HumanoidAbomination: Having survived what should've been certain death, combined with his Quirk-enhanced lifespan, severe case of FacialHorror, and rampant sociopathy, All For One seems to have devolved into something less than human. Many shots frame him as some sort of EldritchAbomination akin to [[Franchise/TheSlenderManMythos Slender Man]], standing head and shoulders above other characters with a stooping, hunched gait, or sprouting out of Shigaraki in the vestige world like a horror movie creature. It's so bad that even Hawks is able to sense something truly vile is happening inside All For One's copy of his own Quirk, where he's shown ''eating'' the vestiges of those rebelling against him. So many years of using his PowerParasite powers seem to have turned him into something of a parasite himself, latching onto whatever he can find in his quest to consume ''everything'', living up to the name "All For One."

** Hawks theorizes that AFO's sociopathic nature prevents him from taking and subjugating One For All. Despite the generations-long history of animosity between AFO and the wielders, he himself cannot care strongly enough to steal the Quirk that opposes him due to his inability to emotionally grow as a person. Furthermore, the FinalBattle has All For One utterly checkmated at every point, with the situation only turning in his favor once again by the willpower and efforts of the younger villains on his side, which he gleefully lampshades, stating that he places more faith in a person's emotions than anything else, despite lacking deep emotions himself.

* LivingLieDetector: All For One has a Quirk that allows him to sense malicious intent and use that to sense if someone is lying, which was apparently stolen from the ancestor of Naomasa Tsukauchi. However, [[LogicalWeakness It doesn't work on someone]] who has ''no intent'' in their voices at all, such as those controlled by [[CompellingVoice Shinso's quirk]]. His usage of such implies that, for all his long years alive and skill with manipulating people over the years, All For One's Sociopathy prevents him being able to acutely gauge when others are being untruthful towards him.

* MaskOfSanity: While always sociopathic, for the most part All For One shows himself as calm, collected, and always in control. However, the FinalBattle reveals that underneath it, he's far more unstable than he seemed.

** All For One is a narcissistic sociopath who only cares about power, himself, and what people could do for him, including his adopted son. His immense desire to claim One for All, could be seen as him trying to retrieve an extension of himself that refuses to comply with his wishes.

** Chapter 369 opens with a flashback of All For One killing the Second User with BerserkerTears streaming down his face. This is particurly notable as All For One is noted InUniverse to be a true sociopath and should be incapable of feeling strong enough emotions to cry.

* PerpetualSmiler: When not wearing his mask, All For One always has a PsychoticSmirk on his face. Hawks takes note of this and outright wonders if All For One is actually ''incapable'' of feeling true hatred for people. During the FinalBattle, inside his MentalWorld, which showcases his full range of expression underneath his CoolMask --[[TheFaceless such as it is]]-- All For One is shown to break out into a wide smile even when he's going ThisCannotBe at the efforts of the vestiges contained within him in fighting against him, inspired by the efforts of a 'side character' like Jiro. This implies that no matter what negative emotions All For One experiences, he habitually defaults to a smile irrespective of [[StepFordSmiler how he's truly feeling]], just in this case, ''this'' smile is visibly more forced and frustrated than he'd otherwise shown before. The smile ''finally'' vanishes from his face after Tokoyami manages to shatter his damaged mask into fragments, forcing All For One to recognize that he's actually losing the fight and ''literally'' explode into a VillainousBreakdown in [[SoreLoser denial of that fact]]. His inner self is shown to be actually screaming in rage as it brutally subdues the attacking vestiges with a feral {{Wrath}} despite his sociopathic nature, showing just how badly the situation is going for him.

* ThePowerOfHate: The one emotion that All For One seems to have faith in is hatred. His entire plan revolves around raising Shigaraki to be the most angry, hate filled person physically possible, hoping that sheer hate will provide the willpower needed for his Vestige in his Quirk to merge with him and finally steal One For All. However, All For One is so fixated on this, to the point of viewing empathy and remorse as ''weaknesses'', that it blinds him to how powerful [[PowerOfLove its polar opposite]] is. Indeed, he believed his mental merging into Tomura was completed by the point he showed up to 'confront' Izuku for the FinalBattle, and is taken off-guard when the fighting exposes the 'Tenko Shimura' Tomura's childhood self and [[ChildrenAreInnocent remaining innocence]], still exists, able to resist his mental assimilation because of the happier childhood memories he does possess, a possibility All For One was [[DidntSeeThatComing completely blind to]]. Ironically enough, despite believing it to be superior, All For One's sociopathy means he himself can't actually get invested enough in the conflict to [[WhyCantIHateYou actually hate anybody]]-- and even then, he mockingly invokes this [[NothingPersonal in a roundabout manner]] to further piss everybody off.

* PowerParasite: The essence of All For One, which allows him to steal others' Quirks for himself. All For One himself; because his sociopathy leaves him lacking the emotional capacity to steal One For All, he's hoping to use Tomura's sheer hatred to counter this. Otherwise, All For One has no means of acquiring One For All on his own merits and is using Tomura like a leech.

** All For One's sociopathy makes him a ruthless, dangerous individual...but also, as Hawks points out, is one of his biggest weaknesses, as it blinds him to certain things and makes him physically incapable of becoming truly emotionally invested in anything. This is a problem, as his inability to become invested means he underestimates his opponents and can't work up the emotional will needed to achieve his goal of stealing One For All.

* SiblingYinYang: With his younger brother Yoichi. AFO is a [[TheSociopath sociopathic]] CardCarryingVillain who revels in power and sadism, was born with (arguably) the [[PowerParasite strongest]] Quirk in the series and believes in the supremacy of powerful Quirk users. Meanwhile, Yoichi is a kind-hearted AllLovingHero who fights for peace in society, had a (seemingly) useless ability that he was initially completely unaware of, and believes that [[RightMakesMight moral strength]] is what's truly important.

** His counterpoint to All Might's smiles of reassurance to people in danger, [[EvilCounterpart signaling to others that they're in impending danger.]] He's constantly cracking wide, toothy grins whenever he's getting particularly emotionally worked up, smug or satisfied with his victory, which helps sell how there's something ''off'' about him. Hawks even brings this trait of his up, noting that his near-constant smile is a sign of him being TheSociopath, unable to relate properly to others on an emotional level and utterly disconnected from them in terms of his own desires and wants. Hawks even posits that CharacterTic is a sign that, despite the generations-long feud with the holders of One For All, All For One ''cannot'' become emotionally invested in taking them down, which is the very reason he cannot overcome [[ManySpiritsInsideOfOne One For All's]] HeroicWillpower and steal the Quirk.

* TheSociopath: Befitting one known as the Symbol of Evil, All For One carries all the traits of a classic sociopath: he has no empathy or remorse for all the things he has done, shamelessly bragging to his brother about how his followers had wiped out a faction of Quirk users who refused to join him. He views others as mere pawns to be used. He lies and manipulates others with ease. He's a {{Sadist}} who enjoys getting under other people's skin, often taunting All Might about the death of his mentor. He is incredibly arrogant and condescending to the point of megalomania and is charismatic enough to gain a loyal following of villains to serve under him. Even when he does something to help someone, it's never out of pure altruism and he always has an ulterior motive:

** All For One's such an egomaniac that he has difficulty truly seeing anyone as a genuine threat. He's pretty much written off Izuku as a threat, confident he'll be able to kill him before he reaches his potential. Hawks points out that, being TheSociopath, All For One is fundamentally incapable of being emotionally invested in things like a normal person.

* WhatIsThisFeeling: When the heroes are actually winning against him despite his best efforts, he apparently hits his RageBreakingPoint and [[EmotionalPowers directly channels his spiteful anger towards them into powering up his Quirks]] to the point they visibly damage his physical body, which gets fixed by Rewind. Befitting his sociopathic nature, he expresses unfamiliarity with the sensation and attributes it so his PsychicLink with his "other self" allowing him to feel deep-seated rage for once.

* WhyCantIHateYou: Surprisingly enough, for all his twisted actions, All For One appears to not actually hate anyone due to his {{Sociopath}}y. Hawks speculates that the entire reason he took on Tomura was because he himself lacks the hatred necessary to steal One For All.

** The vestige of himself merged into Tomura's makes it clear that he's focused on killing him as painfully as possible to break Izuku's HeroicWillpower. He eventually succeeds in killing Bakugou when a blow to his chest causes an internal detonation from his Quirk that blows his heart to pieces.

* CannotTellFictionFromReality: {{Downplayed}}. All For One isn't ''completely'' delusional and is fully capable of understanding the reality of his situation and adapting it to suit it long-term plans with practiced skill. But as the series approaches the FinalBattle, it becomes clear that on some level he genuinely does see the events unfolding around him like a real-life comic book, helped by the fact that he exists in a world with ''actual'' superpowers. He sees himself as a real life "Demon Lord" and sincerely refers to non-One For All users as "jobber characters" who only exist to showcase his strength in a fight. This mindset backfires on him constantly when those same "jobber characters" start turning the tables on him.

* DeathByDeaging: {{Discussed}}. He considers (or at least wants the heroes to think he does) his permanently-disfigured and broken body to be '[[ExpendableClone destined for the scrap heap]]' in favor of his ideal self as undergoing a SplitPersonalityMerge within Tomura's strengthened body, thus he has no issues using [[DangerousForbiddenTechnique potentially dangerous but highly-useful abilities]] with his old body despite his entire endgame being to find a way to become an immortal and invincible demon lord. To this end, he 'tests out' a variant of Eri's [[DevolutionDevice Rewind Quirk]] he absorbed from the Destroying Bullets to see how it will affect his broken body in place of a proper HealingFactor, despite the potential risk of him being {{Retgone}} from mishandling the Quirk. This is in part because Endeavor manages to fatally burn him almost to ash, so he has nothing to lose.

** All For One has proven to be practically unstoppable. Until the very end of the series, nothing has been able to inflict lasting damage to him or his schemes. Even in his crippled state, All For One is such a menace, that any hero who rises against him is instantly defeated, regardless of their strength or skill. Indeed, his first true loss in the series comes at the cost of the strongest hero in the world, whose quirk was an outright RealityWarper, having to pull a HeroicSacrifice to stop him, and even then, the method she used to beat him relied upon indirectly weakening him rather that outright overwhelming him with her quirk, because the enhancements he'd made to Tomura's body meant that not even pulling a direct hit with a [WMD] was enough to stop him. In his rewound state, not only is he stronger than ever and lacking the AchillesHeel they were relying on to defeat him, but the Rewind energy also undoes any damage inflicted on him as well, even resurrecting him from being smashed into pieces at once point, meaning he ''cannot'' be physically defeated anymore. The only downside is that the same energy will eventually Retgone him from existence, but until then, the heroes can only endure his attacks one-sidedly.
** As his rants against the heroes illustrate, he perceived the Demon Lord figure from his childhood comic books as being this, to the point of actually stopping before the point the narrative depicted [[TheGoodGuysAlwaysWin his inevitable failure]] out of [[IRejectYourReality blind rejection for that outcome]]. It transpires that [[CannotTellFictionFromReality he sincerely believes]] that by modelling himself after said figure and planning accordingly to avoid the pitfalls that undid him, he will likewise be utterly unstoppable and unbeatable no matter what and will never actually lose. Needless to this, getting faced with the fact that [[NotSoInvincibleAfterAll such a figure can't exist in reality]] is something that constantly [[SoreLoser infuriates him]].
** As the fighting drags on however, it becomes clear that one thing he ''is'' utterly delusional about was whole-heartedly believing that the Demon lord figure was an [[InvincibleVillain unstoppable force]], to the point of willingly rejecting [[TheGoodGuysAlwaysWin the actual ending]], and he likewise is ''utterly incapable'' of accepting he and his plans can be beaten. He thought that by modelling himself in the image of the "Demon Lord" and planning for every setback, he'd be guaranteed to win, and as his losses mount, he steadfastly [[IRejectYourReality rejects this outcome]] because it's 'not right'.

** A {{Downplayed|Trope}} example occurs with Izuku himself, [[BookEnds appropriately enough]]. Izuku was ''already'' on the path to becoming the WorldsStrongestMan through One For All's ComboPlatterPowers, and in All For One's crosshairs for possessing [[ForbiddenFruit it]], but it was a gradual process that came with the quirk slowly awakening over the course of an entire year, and Izuku's connection to the visages being spotty and infrequent, giving him significant hurdles in [[HowDoIShootWeb managing his new unexplained abilities]]. However, All For One's single-minded ''obsession'' with absorbing his brother's quirk induced him to make the attempt to steal it as soon as Tomura awakened with his quirk, resulting in the vestiges getting drawn out and [[NiceJobFixingItVillain strengthening their connection to Izuku]] through their mental tug-of-war. In the aftermath, the vestiges are able to frequently communicate and coach Izuku on how best to use their powers in tandem, resulting in his combat ability skyrocketing once he begins chaining his quirks together for increased effect. Mere months after the battle at Jaku hospital, Izuku's become strong enough to easily trounce All For One, even in his 'perfected Demon Lord' self in Tomura, a [[TookALevelInBadass rapid power spike]] that wouldn't have occurred if All For One hadn't been too greedy. For bonus {{Irony}}, part of All For One's haste in stealing One For All from Izuku immediately was to deny him the chance to [[TimeToUnlockMoreTruePotential better master his powers]] before their showdown, only for his very attempts to prevent that to result in that exact outcome.

** A {{Downplayed}} example occurs with Izuku himself, [[BookEnds appropriately enough]]. Izuku was ''already'' on the path to becoming the WorldsStrongestMan through One For All's ComboPlatterPowers, and in All For One's crosshairs for possessing [[ForbiddenFruit it]], but it was a gradual process that came with the quirk slowly awakening over the course of an entire year, and Izuku's connection to the visages being spotty and infrequent, giving him significant hurdles in [[HowDoIShootWeb managing his new unexplained abilities]]. However, All For One's single-minded ''obsession'' with absorbing his brother's quirk induced him to make the attempt to steal it as soon as Tomura awakened with his quirk, resulting in the vestiges getting drawn out and [[NiceJobFixingItVillain strengthening their connection to Izuku]] through their mental tug-of-war. In the aftermath, the vestiges are able to frequently communicate and coach Izuku on how best to use their powers in tandem, resulting in his combat ability skyrocketing once he begins chaining his quirks together for increased effect. Mere months after the battle at Jaku hospital, Izuku's become strong enough to easily trounce All For One, even in his 'perfected Demon Lord' self in Tomura, a [[TookALevelInBadass rapid power spike]] that wouldn't have occurred if All For One hadn't been too greedy. For bonus {{Irony}}, part of All For One's haste in stealing One For All from Izuku immediately was to deny him the chance to [[TimeToUnlockMoreTruePotential better master his powers]] before their showdown, only for his very attempts to prevent that to result in that exact outcome.

* HumiliationConga: Subjected to this during most of Final Act starting at the Star and Stripe arc. Every last one of All For One's schemes goes utterly, ''hilariously'' wrong, to the point he's frequently screaming his head off, ranting and raving about how unfair it is and coming off as a SoreLoser. His plan to capture Midoriya fails thanks to his friends convincing him to return to U.A. His battle against Star and Stripe ends with a good number of his Quirks destroyed and Shigaraki's completion delayed by a week. His plan to use Aoyama to lure Midoriya away from U.A. results in him being LuredIntoATrap instead. Prime All For One gets barbecued by Endeavor and is forced to use Eri's Rewind Quirk to survive, and it's slowly rewinding him out of existence. The vestige of All For One inside Shigaraki is subjected to a CurbStompBattle by Midoriya, damaging Shigaraki's body enough that Shigaraki is able to desstroy the vestige and retake control of his body for good.

* HumanoidAbomination: Having survived what should've been certain death, combined with his Quirk-enhanced lifespan, severe case of FacialHorror, and rampant sociopathy, All For One seems to have devolved into something less than human. Many shots frame him as some sort of EldritchHorror akin to [[Franchise/TheSlenderManMythos Slender Man]], standing head and shoulders above other characters with a stooping, hunched gait, or sprouting out of Shigaraki in the vestige world like a horror movie creature. It's so bad that even Hawks is able to sense something truly vile is happening inside All For One's copy of his own Quirk, where he's shown ''eating'' the vestiges of those rebelling against him. So many years of using his PowerParasite powers seem to have turned him into something of a parasite himself, latching onto whatever he can find in his quest to consume ''everything'', living up to the name "All For One."

*** Izuku after the Kamino incident. He becomes fixated on him as his new enemy after All Might's retirement and tortures the boy mercilessly, almost like a child who's found a new toy. And the feeling is mutual on Izuku's end as he loathes and detests him with every fiber of his being. Him being the final One For All user also magnifies All For One's obsession with the Quirk, as he grows increasingly determined to destroy the young boy at any cost necessary.

* BadassBaritone: In the Japanese dub, All For One has a deep, menacing voice befitting a villain of his caliber. In the English dub, All For One's voice is still deep but is given an unsettling rasp, benefitting his cold and callousness.

* LovecraftianSuperpower: Whenever he uses his Quirks, expect copious amounts of BodyHorror. A Spring-Limbs Quirk causes his arm to compress and inflate like an actual spring. His "Rivet Stab" Quirk has black and red tendrils extend from his fingers. In an attempt to finish off All Might, he uses a mass combination of Quirks to transform his entire right arm into a grotesque sight of hypertrophied flesh and ''tangled arms'' with metallic parts sticking out. A special note goes to the [[BladeBelowTheShoulder Spear-like Bones Quirk]], which couldn't be pretty under any circumstances. He adds a new one to the list in the final battle by showing the ability to [[TooManyMouths transform parts of his flesh into mouths]] whether it be a single finger or his whole hand; special mention also goes to him combining this with Spear-like Bones to serve as the teeth. There's also whatever Quirk he used in the battle that killed Nana Shimura, [[https://bokunoheroacademia.fandom.com/wiki/File:Nana_Shimura%27s_Last_Stand.png which involved massive amalgamations of random body parts]].

---->'''All Might (suiting up):''' You must remember the [[ItsPersonal endless warring that got us here...]] And now I hear that Tomura Shigaraki's hatred is even [[ThePowerOfHate affecting your original body.]] So I'm thinking you won't be able to ignore me. Isn't that right? ''[[{{Catchphrase}} I AM]]'' ''[[BadassBoast HERE.]]''