Characters / Glitchtale

The characters page for Glitchtale. Beware of unmarked spoilers.

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Main Cast

Frisk

voiced by: Strelok

The protagonist of Undertale, and the only soul of pure Determination on the planet.

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• The Atoner: Season 1 begins with Frisk trying to make up for going on the genocide route; later episodes show that their behavior was even worse than this before the start of the series, with them playing around with the monsters' lives countless times, seemingly out of nothing but curiosity. In Episode 5, their decision to trade places with Chara and ceasing to exist in the real world seems to be motivated in part by their desire to take responsibility for this, and for screwing over Chara and glitching the timeline in the past.
• Adaptational Angst Upgrade: While it's certainly possible to replicate most of the events that set up the series, where this really comes into play is the revelation that Frisk was, at least in their mind, in danger of being removed from existence, similar to Gaster.
• Ambiguous Gender: Played with. Word of God states Frisk is male, but is almost exclusively referred to by gender neutral pronouns save for one instance in late Season Two that has Betty identify them as a boy.
• Ambiguous Situation: Frisk explains to Asriel in Part 1 of Love that once they destroyed the reset button, they planned to return to their "black screen" and let all the monsters live on the surface without them, only to wake up and be startled to find that everything was continuing with them, making the nature of their existence ambiguous. Further mudding things is Word of God stating that Frisk didn’t exactly have a life before climbing Mt. Ebott, and when fans asked if Frisk was even Human, the only response was complete silence. Supplementary aterial eventually confirmed that Frisk is the player of the game, explaining things like why the surface itself is new to them, among other things.
• Batman Grabs a Gun: In Season 2, Frisk suggests using a reset to go back and prevent all the chaos that's going on in this season, despite having promised they would never reset again and even breaking the reset button. This is a subversion, however, since they later confess they've been trying to go back since they first broke the button.
• Cessation of Existence: Frisk enters the void and send Chara back to the world in their stead along with erasing everyone's memories of Frisk themselves. By doing so, they start to disappear within the void for good.
• Comes Great Responsibility: Frisk's ability to SAVE, LOAD, and RESET is given the same Deconstruction in this series as in the game proper. "Love: Part 1" reveals just how much Frisk was lacking in the "responsibility" department.
• Curb-Stomp Battle: Betty hammers them into the ground during their first face-off, but Frisk turns it around after becoming LV 19 and slicing her arm clean off. Betty flips it back around again when she summons Sans to fight on her side.
• Decoy Protagonist: In Season 2, they replace themselves with Chara to stop Betty in their place, disappearing into the void along with everyone's memories of them.
• Despair Event Horizon: In Season 2, they're absolutely devastated by Sans' (irreversible) death. When it looks like Gaster has helped Frisk bounce back, his defeat and the deaths of Cam (getting an eyeful of the body, no less) and Alphys finish dragging them across.
• The Determinator: As always, they have a lot of determination. This time, it lets them pull free from Chara briefly and save Sans during a Genocide Route. That's what starts off the entire series.
• Forgotten Fallen Friend: Frisk becomes this to everyone, and Asriel in particular, after the fifth episode of Season 2 when they trade lives with Chara. Sans is the only one who has some memory of him left and even then, these feelings ultimately die with him.
• Heroic Sacrifice: Frisk ends up replacing themselves with Chara in order to save the timeline from their glitching. They're removed from reality entirely and all memories of them are replaced with Chara.
• The Load: Throughout most of "Your Best Friend", as they can't really do much compared to Flowey/Asriel.
• My God, What Have I Done?:
  • Feels this way about their Genocide run. Possibly; "Love Part 1" and Chara's dialogue in "My Promise" throws into serious doubt how much they actually felt bad about it.
  • After asking Sans about whether they should try and RESET despite having destroyed the RESET button, they feel like this since this cost them Sans' trust and friendship. Although it turns out Sans knew that Frisk had been trying to RESET anyway.
  • The defining moment is when they are confronted by the true form of Bete Noire. Not only is Frisk defeated, but they, Asgore and Toriel fail utterly to save Asriel. All of the glitches they exploited, every RESET, all of the murders, all of the levels in Jerkass they took to overcome Betty and save everyone... it all amounted to nothing. Worse yet, the price they paid was that they glitched themselves and threatened to erase the timeline just by existing, and their only recourse is to banish themselves to the Void and pray that one of their past enemies can fix their mess.
• Red Eyes, Take Warning: LV 19 Frisk has red eyes.
• Ret-Gone: Does this to themselves, doing exactly what Gaster did, and replacing every instance of themselves in history with Chara so that their increasingly glitched soul and body don't suddenly erase the timeline. They then glitch out of existence, rendering them Deader than Dead.
• Suddenly Voiced: In the game, Frisk's dialogue is given mostly secondhand, told to us by the narrator, and this trend is still seen in Season 1 (with the exception of occasional giggles, gasps, and the like), but they get the same treatment as everyone else in Season 2. Since the narrator now no longer exists, this might be why Frisk is now able to speak for himself.
• Took a Level in Badass:
  • In "Do or Die", they finally generate a weapon thanks to a pep talk from Gaster helping them regain their Determination.
  • In "Love: Part 2", seeing Asriel's soul get eaten by Akumu enrages Frisk enough that their LV instantly jumps to 19, and they gain the same Healing Factor Undyne the Undying did. They might have won if they weren't so stunned at Papyrus saving Sans that Betty had a chance to escape.
• Took a Level in Kindness: Many of the things Chara says, in the episodes "Continue" and "My Promise" in particular, indicate that Frisk was actually pretty coldhearted before the start of the series, up to them foisting all the consequences for their Genocide run onto Chara, which comes at the end of them resetting the world countless times and murdering their friends just because they were bored and didn't want to move on to the surface. By contrast, their genuine attempts to fix things in the present, regardless of some of their jerkassery along the way, are a step up.
• Took a Level in Jerkass: They start acting cold and harsh towards their loved ones, wanting to gain enough LV to stop Betty and Kumu without causing physical harm. Their behavior worsens when they actually slash Toriel's hand and deny that they are mother and child before running off to take on their enemy. When the Evil Duo take Asriel's soul, Frisk is enraged to the point where they hit LV 19 instantly, swearing that no matter the consequences of their actions, they can deal with it as long as Betty dies in the end.

Chara

voiced by: Lumisau

The first human that ever fell into the Underground, having been reawakened from death by inexplicably having latched their spirit onto Frisk when they landed on their grave.

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• Ambiguous Gender: Throughout most of the story until Gaster identifies him as male in Season 2.
• And I Must Scream:
  • Camila stated that upon Chara purging their HATE and no longer being able to form a stable SOUL out of it, they ended up banished to the Void because there can't be more than one red SOUL owner per timeline.
  • Their death, caused by eating buttercups, being stuck as a mummy, and spending a century in the void between dying and meeting Frisk doesn't sound fun, either.
• Attack Hello: Their immediate response to meeting Frisk in the Void is to deck them for what they put them through.
• Back from the Dead: In "My Promise", Frisk banishes themselves to the Void and gives Chara their soul, letting them take their place.
• Black Eyes of Crazy: Subverted as Chara isn't unstable but at the end of "Animosity" when they asked if HATE wanted to see Hate, their eyes turned black as they planned to show their titular Animosity.
• Book Ends: By the end of "Animosity", Chara absorbs the HATE from Asriel into themselves, except now they have full control over its power, calling it their "Animosity"... which they most certainly need, as HATE already has a much more suitable (and already dead) vessel to take full and complete control and inhabitance of. They also took a hit from HATE for two skeletons, whereas at the beginning of the series they (possessed by HATE) tried to kill a skeleton and Frisk intervened.
• Big Bad: Season 1. Although it's not their fault so much as it is the HATE controlling them as a result of Frisk's past Genocide route.
• Big Damn Heroes: They attack Betty and save Mettaton from her, then they take a hit for Papyrus and Gaster to save them from HATE.
• Broad Strokes: Chara in Undertale canon is notorious for having a sparse origin story and very little explanation of their motives, leaving the fanbase to piece together their own ideas with what little information there is. Glitchtale goes with an Anti-Villain interpretation: that their revenge against humanity was merely a secondary objective to freeing the monsters they loved so much, but they've become completely corrupted by HATE by the time of the story.
• Colour-Coded for Your Convenience: The color of their slashes reflect the type of attack — for example, dark red slashes hang in the air for a few seconds. Then they absorb the Determination extracted from the six human souls.
• Curb-Stomp Battle: Fueled by their HATE, they are able to defeat the main cast easily. They are on the receiving end of one from the seven souls that Asriel uses against them.
• Heel–Face Turn: Asriel erases the Hate from them for good and they give Asriel one last soul to break the barrier — their own, containing the determination of all the other souls.
• The Hero: Frisk takes their place in the void and sends them back to the world to destroy HATE and Fear, meaning from "My Promise" onward they are presumably the true protagonist of the story.
• My God, What Have I Done?: As soon as they destroy the locket that represented the love between themselves and Asriel, they are inexplicably driven to tears.
• One-Hit Kill: Their special attack, "My Special Hell", an area-of-effect attack, is implied to do this to anyone unfortunate enough to get hit by it.
• One-Winged Angel: In "Continue", HATE's power turns their entire body (save their hair) pitch-black and their eyes and mouth pure blood-red, increasing their abilities to the point where they can fight God of Hyperdeath Asriel — until he starts pounding them with the seven traits and shattering the HATE substance.
• Please, Don't Leave Me: Seen in "My Promise." Despite having raked Frisk over the coals for their actions literal moments ago, Chara breaks into panic and concern when they learn that not only will Frisk be unable to be with them the same way Chara was there for Frisk, but Frisk is giving Chara all their memories... because Frisk doomed to oblivion and thus be erased from everyone's memories. They desperately try to stop Frisk to no avail and can only tearfully beg to not forget Frisk as their memories are rewritten.
• Required Secondary Powers: Chara needs a SOUL to own a save file, but according to Word of God there can't be two red SOULs in one timeline, which is a problem since Chara's original soul color was red. When they acquire enough Determination to create a save, the Undertale game itself finds the error and gives Chara a black SOUL of HATE to save with in an attempt to fix it, one of the major titular glitches.
• Story-Breaker Power: Overlapping with Too Powerful to Live. While Frisk has more Determination than Chara, Chara is better at using it, and demonstrates as such after stealing Frisk's in Season 1. If the reformed Chara were still around in the aftermath, the Determination-weak Big Bad of Season 2 would be crushed in a matter of seconds. Betty brought Corrupted Asriel into the fray expressly to prevent this from happening after seeing how outrageously outmatched she was against Frisk's Determination, which ends up being a stubborn obstacle for Chara when they're revived late-season.
• Sword Beam: Almost all of their attacks are some variant of this.
• Taking the Bullet: In an interesting Book Ends, they take the slash that HATE intended for Gaster and Papyrus, a Call-Back to when Chara (under HATE's control) attacked Sans only for Frisk to take the hit instead.
• Took a Level in Badass: As of "Animosity", Chara purges the HATE from Asriel and can now use its power for themselves, even calling it their "Animosity", but for heroic purposes, such as... defeating HATE itself, ironically, who is inhabiting another body.
• Transferable Memory: A variant. Frisk transfers to them all their memories of what happened... but that's because Chara is taking Frisk's place and also serves as a memory override, with Chara taking Frisk's place in reality.
• Villain Has a Point: After crossing the Despair Event Horizon, Frisk begrudgingly admits that even corrupted by HATE, Chara may not have been wrong about wanting to outright erase the glitched timeline on account of all of the bad things resulting from it.
  Snippet from "Love: Part 1" video description: * He was right all along...
• Vitriolic Best Buds: Perhaps the best way to describe their friendship with Frisk. They were understandably pissed at Frisk for what happened and took great pleasure in getting Frisk to admit they needed Chara all along. However, they grow shocked that Frisk cannot accompany Chara with them like they did with Frisk. They then fall to pieces when they realize Frisk is doomed, trying to stop them and desperately trying to not forget Frisk as their memories are rewritten. For all their anger at Frisk, Chara does truly care for Frisk.

Flowey / Asriel

voiced by: Strelok (Flowey, God of Hyperdeath in "Continue"), Adox (Asriel), Geritz (God of Hyperdeath in "Hope")

^{The God of Hyperdeath}

^{Photoshop Flowey}

The Crown Prince of Monsters and son to Asgore and Toriel.

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• An Arm and a Leg: As Photoshop Flowey, he gets his right arm torn off by Chara to put him out of commission.
• Back from the Dead: Like in the main game, Flowey is Asriel's return from death, and he's fully revived into Asriel proper by Season 1. Betty kills him in Season 2, but of course brings him back as a pawn to fight Toriel and Asgore.
• Beware the Nice Ones: Asriel's a Nice Guy, but push his buttons, and he'll snap. However, only Betty and Akumu found out the hard way and lived to tell the tale.
• Bishōnen Line: Photoshop Flowey is outclassed by Chara, but when he becomes Asriel again, he stands a much better chance.
• Brainwashed and Crazy: In "My Promise", Betty has done a repeat of what she did with Sans by making Asriel into an enemy for Toriel and Asgore, who criticizes them for the things they did after his death. It's clearly not how he actually felt, though. Chara saves him from HATE by taking the magic and transforming it into a new tamed power amplifier called "Animosity".
• Calling the Old Man Out: As Betty's zombie, he berates Toriel and Asgore for how they handled his death, although it's more a repetition of what they themselves accused each other of in the beginning of the episode than anything.
• Came Back Strong: When fully revived thanks to Frisk, Asriel comes back already in his God of Hyperdeath form.
• The Dragon: After Betty corrupts him using HATE, he serves as her guardian. Chara manages to break him free.
• Enemy Mine: For a while his joining up with Sans to save Frisk was just so that Chara didn't destroy the timeline, and neither of them got along with each other. Of course, after he became Asriel again, their relationship was an actual partnership.
• Forgiveness: Just as Frisk sincerely forgave Asriel for what he did as Flowey, he chooses to forgive Frisk for performing a genocide route.
• Heel–Face Turn: Flowey joins Frisk and Sans in "*Determination" to stop Chara, but truly turns good when he's resurrected as Asriel. Happens again when Chara frees him from HATE, and he joins Chara to battle against HATE's physical form.
• Heroic Second Wind: HATE stabs Asriel through the chest and shatters his SOUL to pieces... only for it to immediately fuse back together to transform Asriel into his God of Hyperdeath form.
• Nice Guy: As Asriel, at least. Can't say the same about Flowey.
• One-Winged Angel: Several, though his Hypderdeath form is undoubtedly his ultimate one.
• Ugly Cute: Compare Photoshop Flowey in canon◊ to this Flowey, his design has been toned down by quite a bit.

Sans

voiced by: Strelok (Season 1), Zedrin ("Dust" to "Love: Part 1"), Djsmell ("Love: Part 2" onward)

Brother of Papyrus. A lot more to him than it seems.

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• Adaptational Badass: In Canon, he has only 1 HP and 1 DEF, whereas here he has 21 HP and 999 DEF.
• Adaptational Nice Guy: He's a lot more helpful and useful in Season 1 then in Canon.
• Back from the Dead: Betty brings him back as a minion for dealing with Frisk, so of course, he's not himself. Papyrus talks him down, so he's dealing with an acute case of Resurrection Sickness instead, although unfortunately he doesn’t last long after that.
• Beware the Silly Ones: He's the last one you want to anger. Just ask Frisk.
• Big Brother Instinct: When Betty has Papyrus in her grip in "Animosity", his immediate response is to teleport behind her and shoot her with a Gaster Blaster. He then uses the last of the magic keeping him alive to summon a horde of Gaster Blasters to overpower Betty after she steals his first set using her Rhabdophobia.
• Big Good: of Season 1 up to his untimely death in Season 2.
• Brainwashed and Crazy: Courtesy of Betty and HATE in Love, Part 2, although Papyrus manages to get through to him.
• Distressed Dude: After his death in "Dust" and resurrection in "Love, Part 2", he ends up dealing with a bout of Resurrection Sickness which leaves him comatose and at the mercy of the villains. Gaster needs to brainstorm ideas for him to come back, which sadly only prove to be temporary.
• Death or Glory Attack: "Gaster Blastermination", which fires an unavoidable barrage of Gaster Blasters, but leaves him pretty much helpless afterwards.
• Demoted to Extra: Although Frisk lends him their power to defeat both Chara and Gaster the first time around, it's Asriel who uses Frisk's soul to stop Chara for the final battle, and then Sans dies protecting Asriel from Betty and Akumu in early Season 2.
• Decoy Protagonist: Sure, Sans was the star of "Megalomaniac" and "Yet Darker", but he's not the main character of the series (or Season 1) for long, as "Determination" and "Your Best Friend" have no spotlight character and "Continue" focuses on Asriel and Chara. By Season 2, he's completely relegated to a supporting role.
• Fusion Dance: Performs a Power Booster type in "Yet Darker", turning him from a fragile hard-hitting speedster into a Lightning Bruiser.
• I'm Melting!: In a similar manner to an Amalgamate, this happens to him shortly before he passes away for good.
• Killed Off for Real: He dies permanently in "Animosity", winning the Beam-O-War against Betty to save his family at the cost of all his remaining Determination magic.
• Only Mostly Dead: Despite Akumu consuming his soul and its magic slowly being drained, it's still intact, allowing him to ultimately be revived, although only temporarily.
• Nice Job Breaking It, Hero: He nearly gets Papyrus and Gaster killed when Betty uses "Rhapdophobia" to steal his Gaster Blasters. He has to summon more to overpower her, resulting in him leaving the world sooner than he'd have hoped.
• Nice Mean And In Between: A light variant between his family, who are all decent people. The prank-loving yet still serious in-between to Papryus' all-loving Nice and Gaster's more stoic and cynical Mean.
• Resurrection Sickness: An extremely bad example, as Sans is currently considered to have "fallen down", and even with Determination Gaster states that Sans will probably not live very long anyways, and he'll be in pain every second until he dies for good.
• Took a Level in Jerkass: He's pretty calm and reasonable in Season 1, even willing to team up with Flowey and trusts the flower enough to give him the human souls to become Omega Flowey. But in Season 2, he's suddenly hostile towards Asriel over the things he did when he was soulless. (Yet he was pretty nice to Flowey in Season 1 during their team up when he didn't have it be AND Asriel is the one that saved everyone and broke the barrier.) He held a grudge for over a month until Asriel apologized. (And Sans didn't even apologize for all the times he killed Asriel as Flowey.) Then Sans gets hostile at Frisk and threatens to kill them for suggesting a reset. His anger at Frisk wanting to break his promise is somewhat understandable, but he's threatening Frisk over a SUGGESTION, it's not like Frisk was trying to reset behind his back that he’s 100% certain of. He doesn't even let Frisk try to explain themselves.
• What the Hell, Hero?: He nearly tears Frisk a new one when they suggest a reset to fix the Betty problem, pointing out that they promised they wouldn't and that it would mean erasing Asriel and Gaster's unique second chances at living. It turns out he's also angry because Frisk had been trying to reset the whole time.
• Worf Had the Flu: Betty had an easy time taking his soul likely because his powers had been brought down by the magic nullifier.

W.D. Gaster

voiced by: Strelok (season 1), Zedrin (season 2), Citrus (young adult, season 3)

Father of Sans and Papyrus, he is broken across time and space.

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• Abusive Dad:
  • Downplayed later in season 2 as Gaster is just mean to Papyrus (one of his sons).
  • Glitchtale Origins: Gaster reveals that his own dad, Roman, was one, as he considered Gaster "weak" and kept trying to push him into cruelty and violence, to the point of disowning him when he refused to.
• The Ace: He has 666,666 HP, is faster than Sans, hits even harder, and upon Sans' death, he grows even stronger, gaining the new ability "Duality".
• Anti-Hero: Has shades of this after Sans' death. He becomes more serious, more single-minded in revenge, and nearly kills a recently reformed Jessica Grey because she was involved in killing Sans, only being stopped by Papyrus.
• Attack Drones: Aside from Gaster Blasters, he's also able to summon seven hands, each keyed to the seven colors of magic. These can be shifted to a single color for a more powerful attack. After Sans dies and Gaster gets a 50% power boost, he can summon two huge hands that can shift to any of the seven colors.
• Badass Boast: Several.
  Gaster: (To Betty in "Do or Die") You're the first of your kind. I'll make sure you're the last.
  Gaster: (To Betty in "Animosity") Come.
• Badass Long Robe: Interchanges between this and Badass Longcoat.
• Big Bad: In "Yet Darker", episode 2 of Season 1, in which Chara is absent.
• Broad Strokes: Information on Gaster in Undertale canon is far and few between, due to his status, keeping many facts, like his appearance, ambiguous. Glitchtale goes with the theory of him being Sans and Papyrus' father.
• Broke Your Arm Punching Out Cthulhu: He passes out right after destroying Betty, leaving Papyrus nearly defenseless against HATE's emergence. He ends up sleeping for three staight days.
• Came Back Wrong: In Yet Darker. It doesn't last long, as he is killed at the end, but eventually fully revived in Your Best Friend.
• The Dreaded: A heroic variant in season 2. While Betty doesn't think Sans or Papyrus to be much of a threat, she repeatedly shows apprehension or outright fear when faced with the prospect of fighting Gaster. She was right to be afraid.
• Good Scars, Evil Scars: During his Came Back Wrong phase in Yet Darker, the scars above and below his respective eyes are large gashes across his face, but when he's truly revived later on, his scars are small and less defined.
• Half the Man He Used to Be: Inflicts this on Betty in "Animosity". And he doesn't stop there.
• Heel–Face Turn: He was the villain in his first appearance due to his instability and being barred from existence, but he crosses firmly into the side of good when he's brought back to reality.
• He Knows About Timed Hits: In his introductory episode he's shown to be aware of resetting (as well as continuing), to the point of being able to temporarily stop Frisk from resetting during their fight.
• Heartbroken Badass: After Sans' death, he's overcome with grief—no less capable in battle, but clearly suffering during the quiet moments.
• Hypocrite: He's mad at Jessica for being indirectly responsible for Sans' death while he's best friends with the murderer of Jessica's daughter and he probably made the jars to contain the souls, including her daughter.
• Interim Villain: Since Chara is destroyed for the first time in Megalomaniac, Gaster fills in the villain role for Yet Darker. Chara returns for the following episode and the heroes decide to bring Gaster back the right way.
• Is That the Best You Can Do?: He says this to Betty in "Animosity", just before he gives her a horrifyingly unforgettable Rasputinian Death.
• Last-Name Basis: Gaster is actually his last name.
• Like Father, Like Son: The father to Sans. When Sans manages to bring him back (the right way), they begin exchanging puns.
• Named In The Adaptation: Well, clarified, but Gaster's initials were never specified in any Undertale material or by Word of God. Here, his name is expanded on, being "Wing Din Gaster".
• Nice Mean And In Between: A light variant between his family, who are all decent people. The serious and stoic Mean to Papryus' all-loving Nice and Sans' prank-loving In-Between.
• Offing the Offspring: In his debut, Gaster attempts to murder Sans (one of his sons).
• Old Master: More than a thousand years old, and correspondingly deft and powerful with his magic.
• Pre Ass Kicking One Liner: "Come." He then proceeds to give Bête Noire THE most brutal death in the series.
• Pre-Mortem One-Liner: Said to Betty in "Animosity", shortly before tearing her to shreds.
  Gaster: Is that all?... Then... It's my turn. (moments later) YOU WON’T ESCAPE THIS TIME!
• Rasputinian Death: Delivers a horrifyingly awesome one to Betty in "Animosity". He severs her fingers and thumbs, tears her legs off, skewers her with spikes, crushed her with a giant fist, fries her with a colossal Gaster Blaster and finally blasts her from all angles with beams of determination. All that is left is an unrecognisable charred husk and black smears.
• Roaring Rampage of Revenge: After Sans is killed off permanently and Betty takes aim at Papyrus,he goes on one and tears Betty apart.
• The Sleepless: Outside of the times he gets knocked out and the one moment on the train with Jessica, Gaster doesn't sleep at all once Sans is killed. This plays a big part in him becoming more unstable and colder, even toward Papyrus.
• Special Attack: "Monotone", which makes his next attack stronger sevenfold, "Duality" after Sans' death, which allows him to merge all hands into two giant ones, and "Polychromatism", another special attack only available to him if both Sans AND Papyrus die that has Gaster using his 7 small hands, 2 giant ones AND a massive Gaster Blaster.
• Took a Level in Cynic: Becomes a lot more bitter and revenge-driven after Sans' death.
• Took a Level in Jerkass: Sans' death hits him hard, turning him from someone who was as jovial as Sans when he came back from The Void into someone much colder and serious, especially towards Jessica.
• Tranquil Fury: By far his default mode when pushed pass the Rage Breaking Point.
• The Unfettered: "I JUST WANT TO COME BACK... [...] I'LL USE ANY MEANS NECESSARY".
• Unstoppable Rage: Goes into this after Sans is Killed Off for Real, shortly before he uses Polychromatism and tears Betty limb from limb.
• Villainous Breakdown: Pitches a fit during his fight Sans in "Yet Darker", especially moments before losing his last hand.
• The Worf Effect: He pulls this on Sans in "Yet Darker", and does this to an insane degree on Betty's true form in "Animosity" when using Polychromatism, to the point where there's not much left of her when he finally finishes her off.

Toriel

voiced by: Oolay-Tiger

Former Queen of the Monsters. Now the headmistress of the first new school of magic, teaching magically-inclined children how to use their powers to help others.

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• Action Mom:
  • As always. When Betty starts her attack on Toriel's school, the only shot we get of her is her readying her fire magic.
  • In "Hate" she and Asgore are able to briefly fend of Betty to give Chara time, so he can speak to Asriel.
• Adaptational Nice Guy: While the canon Toriel hasn't fully forgiven Asgore, here she makes up with him and they live together again.
• Badass Teacher: She spends her time instructing children on the surface, but as soon as hell starts breaking loose in Season 2 she demonstrates she has battle skills as well.
• Heartbroken Badass: When Akumu's blob things murder almost every kid in her school, she obviously doesn't take it well.
• Heroic BSoD: Betty uses this against her during their battle in "Hate", by making her hallucinate Asgore killing the fallen children in front of her eyes. It gets so bad that she attacks him, due to believing he was about to kill Chara as well.
• Hypocrite: Asgore and a Betty-resurrected Asriel accuse her of being one, for being so hard on Asgore about the murder of the human children while she herself abandoned the kingdom in its time of need.
• My God, What Have I Done?: Shows this when she got mind-controlled and nearly killed Asgore. She didn't mean it but still...

Asgore

voiced by: Rev987

The ancient King of the Monsters.

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• The Atoner: Season 2 is kicked off by him wanting to atone for killing the human children who fell down, by confessing his crimes and allowing himself to be jailed. Which inspires Jessica to take vengeance for her daughter...
• Crouching Moron, Hidden Badass: Well, he is king of the monsters, but most of the time he's a goofy dad (although "moron" is a huge stretch). But he wholeheartedly volunteers for taking back Toriel's magic school from Betty's magical minions and containing it, which is shown to not be a simple task whatsoever. He puts up an incredible performance against Betty, so much so that she can't even land a hit on him, while he nails her with combo after combo, so quickly that she has no time to react.
• Disney Death: After being shot with a fireball by Toriel, it looks like the end of the road for him, but Gaster intervenes and orders Toriel to take Asgore to safety. She successfully manages to save his life.
• Failed a Spot Check: In the original Sans vs. Flowey animation, he doesn't even notice when attacks are flying through his room. This humorously happens again in “Do or Die” when Gaster nearly kills an atoning Jessica Grey.
• Honor Before Reason: In "Hate" he has Betty at his mercy and on her back, but refuses to kill her while she's lying down. This gives her the opportunity to have a mind-controlled Toriel attack and critically wound him.
• What the Hell, Hero?: He calls out Toriel for abandoning him and their kingdom so many years ago, stating that she no longer deserves the authority and cannot yell at him anymore for making the hard decisions.
• You Are Better Than You Think You Are: He gives a speech like this to Asriel, in regards to his time as Flowey. It works.

Papyrus

voiced by: Citrus

Sans' energetic, always positive brother. Refuses to stop seeing the good in people, no matter what.

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• All-Loving Hero: He forgives everyone, no matter who they are or what they did. Even though he admits he can't solve everything with kindness, his presence in the story contributes to a large portion of the reversal of Cerebus Syndrome that overtakes a huge chunk of season 2, especially in his efforts to help Gaster move on from Sans' death. He can’t even bring himself to hate Betty, and admits to his dad that he didn’t even want to hurt her, let alone kill her, even though he wishes he had felt that desire, or he might have saved his brother.
• Badass Pacifist: Papyrus doesn't want to hurt anyone and will forgive almost anything if the person truly regrets it. Even when his life is threatened, he will always choose to defend rather than attack. Not only can he block attacks from Gaster to protect Jessica from harm, but he also managed to talk down a Hate-fueled and corrupted version of Sans. All without firing a single attack.
  • In "Game Over: Part 2", he gets a bit more direct with his attacks, but still doesn't want to kill anyone, crossing into Martial Pacifist territory.
• Barrier Warrior: One of the few pieces of magic he uses. It works.
• The Cameo: The only appearances Papyrus gets in Season 1 are a few brief mentions, one scene with Sans, and a small flashback sequence.
• Demoted to Extra: Despite his presence in the main game, he doesn't get a major role until Season 2.
• Healing Hands: A split-second shot shows him using these on Gaster after he nearly dies fighting Betty.
• It's All My Fault: Blames himself for his brother’s passing and his father nearly killing himself, all because he didn’t truly want to fight Bête Noire, let alone kill her, possibly because he understood that she was a being without positive emotions.
• Nice Mean And In Between: A light variant between his family, who are all decent people. The all-loving and optimistic Nice to Sans' prank-loving In-Between and Gaster's more stoic and cynical Mean.
• Stepford Smiler: A downplayed version. After his brother's death in "Dust", he manages to mostly behave like his helpful and encouraging self while helping out everyone else who is suffering. In "Love: Part 2", he admits that he is trying his best to be cheerful because they need his emotional support and he really misses his brother. But that doesn't mean his optimism is faked.
• Talking the Monster to Death: Not to death, but to life instead — when Betty summons a Hate-Empowered Sans, Papyrus reaches through to him with just his words and pleas for remembrance.

Alphys

voiced by: KateMarie999

"Why the long face?"

The Royal Scientist. Awkward yet extremely intelligent, she creates technological "artifacts" that help put her nearly on the same level as the other protagonists.

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• Badass Adorable: She may be very Adorable, but she still puts up a good fight. Not only that, she's smart enough to put anyone into a bad corner/situation. Even Betty.
• Badass Normal: Well, as normal as a Made of Magic Monster can be, at any rate. While the entire rest of the cast is some flavor of badass due to their magic abilities, Alphys has essentially nothing to her name but a series of homebrewed artifacts. Between the lot of them, she almost takes out Betty.
• Heroic Sacrifice: Goes in the Nullifier Chamber to face Betty and Kumu herself with a monster-human extermination program, knowing full well that if Betty and Kumu survive, she certainly will not. She's right.
• Impaled with Extreme Prejudice: Accidentally, by Undyne.
• Spirit Advisor Invokes this with Undyne, allowing Undyne to recover from her Heroic BSoD in "HATE".
• We Hardly Knew Ye: This incarnation of Alphys only appears in a few episodes, dying at the end of "Do or Die".

Undyne

voiced by: Adox

^{Undyne the Undying}

^{True Hero}

The head of the Royal Guard in Undertale, and once the monsters get to the surface, gains a major position in the police force.

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• Adaptational Personality Change: She's calmer and (in some ways) more mature then her canon counterpart.
• Curb-Stomp Battle: Kicks Betty's ass at the start of "Love: Part 1". Even after Akumu absorbs the vial of Hate, Undyne still clearly has the upper edge. After using her new True Hero form, she obliterates Kumuzilla in one strike in “Animosity”. A comical and literal case happens prior to taking out Kumuzilla as while Ronan gives his goodbye to Rave, we see Undyne repetitively stomp on a blob to the point of the road cracking from each impact.
• Elemental Rock-Paper-Scissors: As in canon, she has Determination, which is capable of defeating Fear. She almost destroys Betty entirely.
• Flash Step: Is able to pull these off after becoming Undyne the Undying.
• Healing Factor: As Undying, due to no longer being made just of magic. It's potent enough to survive and regenerate the damage of being more or less bisected diagonally across the chest.
• Heartbroken Badass: After being tricked into destroying Alphys' soul and then getting stabbed herself, her pain allows her to become Undyne the Undying.
• Man of Kryptonite: Her Undying form pretty much hard counters Betty. Rhabdophobia doesn't work because she can just make more spears and Betty can't spam it, she can heal faster than Betty can damage her, and most importantly, she has Determination, which defeats Fear. And unlike Frisk's use of LOVE, she's driven by a desire to do right by Alphys and protect everyone.
• More Dakka: During their fight, Betty uses Rhabdophobia to take control of an incoming barrage of Undyne's spears. Undyne tells her she can keep those, then conjures a few more... "a few" being somewhere on the order of a hundred. Cue one seriously pincushioned Betty moments later, followed by a single, supercharged spear that blasts the roof off the whole facility and annihilates half of Betty's body. Only Kumu's intervention via devouring the Hate vial saves her.
• Meaningful Name: Undyne the Undying becomes even more this trope: not only is it her coming back from a fatal wound, she gets an insane Healing Factor that makes killing her extremely difficult.
• O.O.C. Is Serious Business: After being tricked into killing Alphys, Undyne's personality becomes a complete 180 from what it usually is, becoming heavily unsure of herself and her abilities and afraid of putting anyone else in danger. Only when gets a pep talk from Alphys herself does Undyne snap out of it, becoming confident once more.
• One-Hit Kill: Her giant red Spear of Justice ends up obliterating Kumuzilla in a single hit.
• One-Winged Angel: Becomes Undyne the Undying to take on Betty and Kumu. She does it again to save Ronan and Hugo from a collapsing skyscraper, obliterating it.
• Red Eyes, Take Warning: She gains these when she's filled with Determination, and in her Undying armor, you can see her red eyes through her helmet.
• Roaring Rampage of Revenge: After being tricked into killing Alphys by Betty, she becomes Undyne the Undying and goes berserk on Betty.
• Super Mode:
  • Undyne the Undying gets upgraded into this due to her no longer being made of ONLY magic, and thus she won't break down like she previously would have.
  • "Animosity" sees her gaining an even more powerful form called "True Hero", which brings all the perks of the already upgraded Undying form and ramps them up. She has no trouble obliterating dozens of blobs with one gold spear and then vaporizes Kumuzilla in one blow with an upgraded Spear of Justice.
• Walking Spoiler: Since she takes on a major role in Love after becoming Undyne the Undying.

Jessica Grey

voiced by: MEMJ0123

The head of the Anti-Monster Division (AMD) who is against monsters and humans living together at first. After she realizes just how dangerous Betty is and how her actions have made things worse, she joins the good guys to atone for her actions and help stop Betty.

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• The Atoner: After being involved in Sans' death, she joined the heroes to try and make up for it.
• Big Bad: Subverted, as she seems to be the villain of Season 2 but was really being played by Betty the whole time. In reality, she's more of a Big Bad Wannabe.
• Big Bad Wannabe: She's really only dangerous with the Magic Nullifier, which she stops using on the heroes once Betty tortures her and sends her running. She sides with the heroes and uses the Nullifier on Betty the next time.
• Disc-One Final Boss: She acts as a villain for no more than two episodes in the season before getting mercilessly tortured and put in her place by Bete Noire, causing her to flee and join the heroes.
• Even Evil Has Loved Ones: While it's debatable whether or not she was ever evil, she was highly antagonistic towards the monsters, but more because Asgore killed her beloved daughter than anything else.
• Everyone Has Standards: Betty's horrific actions directed at Sans, Asriel, and eventually Jessica herself make her realize that she is most definitely on the wrong side.
• Evil Is Not a Toy: She used Betty as a means to get revenge on the monsters, not realizing that Betty was really the one calling the shots and would turn on her as soon as she showed any resistance to the plan.
• Freudian Excuse: Jessica's daughter disappeared after she missed her ballet recital, and this leads her to becoming bitter and unhappy. Then she finds out that Asgore killed her daughter and everything goes to hell.
• Foil: She makes a nice one to Asgore, even though in terms of personality they're very different. Both of them had lost their children to the opposite race. Both of them reignited conflict between humans and monsters because of their grief and anger at the loss of their child, and both of them came to regret it not that long afterwards.
• Go Out with a Smile: She dies as she remembers her daughter, and finally gets to reunite with her in the afterlife.
• Heel–Face Turn: Out of regret for her actions, she saves Gaster from Betty and Akumu after regaining her Integrity.
• Heroic Sacrifice: Saves Gaster at the cost of her own life.
• My God, What Have I Done?: The episode after Sans' death.
• Punny Name: Her last name is Grey, and she has grey hair (at least, when she's feeling demoralized.)
• Reasonable Authority Figure: Despite her job description and her bitterness, Jessica does soften up to the monsters over the course of the first episode, and hopes that they can coexist peacefully. She only changes her mind on this after hearing Asgore's confession to killing the human children.
• Redemption Equals Death: She eventually proves and redeems herself to Gaster and the rest of the cast at the cost of her dying trying to save Gaster.
• Together in Death: She happily embraces her husband and daughter in the afterlife after performing a Heroic Sacrifice to save Gaster.

Ronan

voiced by: Strelok

Co-worker of Jessica Grey, he handles a lot of the safety and militaristic aspects of the AMD.

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• Anger Born of Worry: He is understandably upset when his son shows up in the middle of town.
• Big Damn Heroes: invokes this trope while saving a random woman from the streets.
• Magitek: uses some of this along with others while trying to protect the city.
• Magic Missile Storm: How he usually attacks things.
• Papa Wolf: Manages to protect his son from the kaiju-sized blob monster at the cost of being hit himself.
• Supernatural Gold Eyes: He has gold eyes to match his magic, being a Justice soul.

Rave

voiced by: Dr.EojPuerte

A mysterious man who wants to test his magic weapons out on the city.

---

• Insufferable Genius: In his first appearance he rather rudely insists to speak to Jessica personally, to get her to allow him to use his magical weapons in the city, dismissing Ronan as "her dog". Subverted later on, as the insufferable part was really him being angry over something else. In reality, he's a kind and gentlemanly person who's willing to help others and even apologizes for how he treated Ronan.
• Jerk with a Heart of Gold: He ends up subverting the Insufferable Genius trope and ends up being very helpful and supportive towards both humans (such as Ronan, whom he once spoke down to) and monsters. He eventually drops the "jerk" part too.
• Meaningful Appearance: He's got the weirdest colored hair in the series yet, with yellow on top and purple on the bottom (which is strangely similar to Odd Della Robbia). This carries over to his text as well. This reflects his dual traits of Justice and Perseverance.
• Survivor's Guilt: Suffers from this thanks to a car accident when he was a child ending with the death of his older brother and Jessica's husband, Noah. It doesn't help that his mother Grace believes that he should have died in Noah's stead ever since.

Side Characters

The Kids

Cam

voiced by: Lumisau

One of the children learning magic at Toriel's school. He possesses a Kindness soul, and is the older brother of another child at the school named Lily.

---

• Barrier Warrior: His only displayed usage of magic is to generate a green shield.
• Big Brother Instinct: Comes to Lily's rescue when the school gets attacked by Betty and Akumu.
• Dies Wide Open: Frisk finds Cam staring lifelessly into the distance after a pink blob spears him.
• Emerald Power: His Soul is green, as is his magic, and his clothes, and his eyes.
• Impaled with Extreme Prejudice: Courtesy of one of the pink blobs, who was actually aiming for his sister Lily.
• Killed Off for Real: He's killed by one of Betty's pink blobs; unlike the monsters Betty's killed, who can be revived because they're made of magic, the humans are confirmed by Gaster to be beyond saving. Indeed, the opening of "My Promise" has Betty destroy all of the other souls she'd collected and specifically using his soul to restore her energy, which destroys it.
• Nice Job Breaking It, Hero: His attempt to save his sister Lily on his own and subsequent eagerness to get her out of the danger zone leads him to turn his back on the table where another blob is hiding, forcing him to take a stab that gets Betty the last extra soul she needs for her special attack.
• Small Role, Big Impact: He only appears three times, once for a few minutes and the other two times as cameos. However, his death and Betty taking his soul is ultimately the sole thing that allows Betty to use her special attack on Gaster, causing a chain reaction that allows the rest of the season to happen as it does. In "My Promise", his soul is the only one not infected with hate due to its trait, and it's the only one Betty absorbs.
• Taking the Bullet: He pushes Lily out of the way of one of the pink blob's Combat Tentacles, getting himself impaled in her place.

Robin

voiced by: Jen

A young girl learning magic at Toriel's School. She possesses a Bravery soul.

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• Action Girl: Is able to shoot balls of orange energy from her hands.
• Back for the Finale: shows up in the credits of "Hope" as a member of the Determino Council.
• Connected All Along: The finale reveals that Raven is her mother.
• Out of Focus: Dissapears from the story for the most part after "Love: Part 1".

Abigail

voiced by: Meredith

A young girl learning magic at Toriel's School. She possesses a Patience soul.

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• All There in the Manual: Is only named in the credits of "Do or Die".
• Back for the Finale: shows up in the credits of "Hope" as a member of the Determino Council.
• Out of Focus: Dissapears from the story for the most part after "Love: Part 1".

Lily

A young girl learning magic at Toriel's School and Cam's younger sister. She possesses a Kindness soul.

---

• Back for the Finale: shows up in the credits of "Hope" as a member of the Determino Council.
• Out of Focus: Dissapears from the story for the most part after "Love: Part 1".

Seth

A boy with a Perseverance soul that Mettaton saves at the arena.

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• All There in the Manual: Is only named in supplementary material.
• Back for the Finale: shows up in the credits of "Hope" as a member of the Determino Council.

Hugo Cass

voiced by: Molodiva

Ronan's son, who also has a Justice soul.

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• Back for the Finale: Twofold; He goes to find Ronan immediately after seeing HATE awaken, and shows up in the Distant Finale as a member of the Determino Council.
• Suffer the Slings: Carries a slingshot, which he uses to fire Justice bullets.
• Supernatural Gold Eyes: He has gold eyes like his father, being a Justice soul.

Zachary

voiced by: Molodiva

A blind boy with an Integrity soul.

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• Back for the Finale: shows up in the credits of "Hope" as a member of the Determino Council.
• Small Role, Big Impact: Only has one scene, but he uses that scene to warn Undyne and Ronan about Kumuzilla just before it emerges.

Mettaton

voiced by: UltimaAlmighty (first appearance), Rev987 (Game Over Part 2 onward)

^{Mettaton NEO}

The former star of the underground. He has since become a reporter on the surface.

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• Adaptational Badass: In the game, Mettaton NEO is killed before he can use a single attack. This time, he gets a proper fight scene.
• A Day in the Limelight: "Game Over: Part 2" places the majority of focus on Mettaton and his efforts to stop Betty throughout the episode.
• Arm Cannon: He uses one as Mettaton NEO.
• Curb Stomp Cushion: He's easily overwhelmed by Betty at first, but when he becomes Mettaton NEO he blasts part of her face off and causes her to yell in pain, along with boosting his speed and flying around, making it much harder for her to land a hit. She still wins, stating that it's obvious he doesn't fight often, but he survives due to being saved by Muffet and Grillby, and later by Chara, Toriel, and Asgore.
• Did You Just Flip Off Cthulhu?: He stick his tongue out at Betty and winks at her while holding onto her leg as Chara comes barreling towards her at full speed.
• Light 'em Up: His spotlight-based blue magic attack from the game shows up a couple of times in Game Over: Part 2
• Locked Out of the Loop: He had no idea that Alphys had died until Asgore told him. Upon hearing the news, Mettaton drops his phone and is left speechless and overcome with grief.
• One-Winged Angel: Mettaton NEO, who manages to hold off Betty long enough for Chara and the Dreemurrs to arrive.
• Super Mode: When his base form proves to be no match for Betty, he activates NEO mode and performs much better.
• The Worf Effect: Mettaton NEO blasts part of Betty's face off, showing that she's still not invincible, but she eventually defeats him anyways, stating that she can tell he doesn't fight very often.

Muffet

voiced by: Celestialsushi

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• Big Damn Heroes: She and Grillby join in the battle against Betty when all seems lost for Mettaton.
• The Cameo: She and Grillby can be seen preparing to fight the pink creatures when Jessica makes her broadcast about staying safe and enlisting monsters' help against said creatures.
• Curb Stomp Cushion: Both she and Grillby manage to land attacks on Betty, but they still ultimately lose. They survive, however, and take Mettaton to safety.

Grillby

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• Big Damn Heroes: He and Mufffet join in the battle against Betty when all seems lost for Mettaton.
• The Cameo: He and Muffet can be seen preparing to fight the pink creatures when Jessica makes her broadcast about staying safe and enlisting monsters' help against said creatures.
• Curb Stomp Cushion: Both he and Muffet manage to land attacks on Betty, but they still ultimately lose. They survive, however, and take Mettaton to safety.
• Playing with Fire: He nails Betty with a fireball to the body while Muffet pins her with a spiderweb.

Noah Rutrow

Jessica's husband and Rave's older brother, who died before the events of the series.

---

• Affectionate Nickname: Called Rave "Four-eyes".
• Big Brother Instinct: Will do anything to protect his brother, even at the cost of his own life.
• Posthumous Character: Died when Rave was only a child.
• Instant Armor: His power allowed him to coat himself or someone else in Perserverance armor. He uses this to make sure a young Rave survives the car crash at the cost of his own life.
• So Proud of You: Tells child Rave this in the past for being around people despite not wanting to. He says it again when they meet in the afterlife for taking on the position of leader and helping save the city from Kumuzilla.

Grace Rutrow

voiced by: Celestialsushi

The mother of Rave and Noah Rutrow.

---

• Abusive Mom: Only toward Rave, who she outright tells after Noah's death that it should've been him instead, worsening Rave's Survivor Guilt. She isn't any better in the present day.
• Hate Sink: Is shown to be absolutely deplorable in how she treats Rave, being the main catalyst behind his lack of self-worth.

Raven

voiced by: Maidenofmine

One of the Kindness wizards in Rave's Kindness squad.

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• The Ace: Rave calls her the best healer they have in "Hope". Indeed, she's shown to be among a special few people that can heal others with her own energy, something stated to be very difficult to do in supplementary material.
• Action Girl: She's on the front lines and fights against HATE Ronan.
• Barrier Warrior: Can create barriers to shield herself and others.
• Big Damn Heroes: Shields Rave from a blast by the HATE blob possessed Ronan when it looks like he is about to die.
• Connected All Along: The Distant Finale "Where Are They Now?" Epilogue of "Hope" reveals she is Robin's mom.

Villains

Bête Noire (Heavy Spoilers)

Betty

voiced by: ProjectSNT

^{Original form}

A perky female student at Toriel's school, possessing a rare pink soul. Frisk first meets her after saving her from an oncoming vehicle. She quickly reveals her true colors once she gains Frisk's trust, putting her plan into action.

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• Adorable Abomination: She's a cute little girl who just so happens to be a living spell construct created to ensure there would always be conflict between the human and monster races.
• A Dog Named "Dog": According to Word of God, Bête Noire is the type of thing that she is in addition to her name, and apparently another one has existed at least once before.
• Always a Bigger Fish:
  • Sans is one of the most powerful monsters around, thanks to his knowledge of the metaverse and pragmatic moveset. Bete makes short work of him by impaling him with a spear.
  • She eventually gets a taste of her own medicine when she encounters Undyne the Undying and realizes just how outmatched she is against the determined monster.
  • She also finds that she is on the receiving end of this to a revenge-driven W.D.Gaster.
• Ambiguous Innocence: It's left deliberately vague just how much free will of her own she has, if she even has any at all, given she was a spell construct created specifically to ensure peace between human and monsterkind would never come to pass, to say nothing of HATE's own manipulation of her.
• Ambiguous Situation:
  • Word of God states that Betty is technically Agate considering they share a Soul, however Betty clearly does not consider herself to be the same person, with all her talk of making "mom" proud, so it's unknown if they are separate personalities or if Agate's spirit is simply inhabiting Betty's soul and corrupting her into evil. Word of God later confirmed that Betty knows she isn't Agate but has her memories magically implanted into herself by Agate's spirit. Betty speaks on behalf of her creator and has her thoughts and intentions.
  • Is Betty's concern for Akumu truly self-preservation? it's implied, and outright confirmed in extra content, that she sees Akumu as her Only Friend because of Agate's corruption.
  • How much free will does she have to begin with? Is she a completely willing tool in her creator's (posthumous) quest for vengeance, or does the fact that Agate intentionally and forcefully copied her memories and personality into her mean the she is Brainwashed and Crazy? is she, in fact, an innocent victim and Agate is the only one to blame here?
• Ancient Evil: Bete, or at least spell used to create her, was created by Agate over a thousand years before the start of the story, specifically so that peace between humans and monsters would never become a reality.
• And I Must Scream: If one believes that she never had free will, only the will and personality of her creator, then her entire existence becomes this, regardless of whether or not she is a completely different entity from Agate, Amber, or both.
• Antichrist: She was created by Bravery/Fear for the explicit purpose of ensuring humans and monsters would never coexist, no matter what that entails — including slaughtering monsters and humans left and right if that's what it takes. Word of God says she only woke up in response to the Barrier being destroyed, heralding the return of the monsters and necessitating her purpose.
• Apocalypse Maiden: Given that HATE is being stored inside her body, Bete Noire's death would essentially result in the monstrosity being released and wrecking havoc on the world. This eventually comes to pass when Gaster kills her, releasing HATE once and for all.
• Arch-Enemy: She ends up being this for Gaster instead of Frisk or Chara because she killed Sans twice. Tellingly, it's Gaster who does her in.
• Artificial Human: She's actually a spell construct created with the spell of the same name, used by Agate in order to ensure there would never be peace between humans and monsters.
• Asshole Victim: As gruesome and brutal as her demise is, and as horrifying as it is to see HATE take advantage of her death by violating and transforming her remains into its own form, she definitely brought all of it upon herself, although she may not have truly had a say in the matter.
• Ax-Crazy: She was bad enough when separated from Kumu, but when she fuses him back into her body, she takes this trope to the absolute extreme.
• Badass Adorable: Cuter than a button and powerful enough to mortally wound Alphys with a single spear, steal Sans and Asriel's souls and bring Gaster, Undyne (before her transformation) and Frisk all to the very brink of death. After regaining her original appearance from absorbing Kumu, she gets... less adorable.
• Beware the Silly Ones: She intially seems like a silly girl...but she's also revealed to be very dangerous.
• Big Bad: Season 2. Her goal is to absorb enough souls to turn all monsters (and any humans that get in the way) to dust, ensuring that monster-human interactions cease forever. However, she seems to be trying desperately to hold onto the Big Bad title, as the substance HATE seems to be taking it from her. She bites the dust just one episode before the finale, thanks to the efforts of the Skeleton Trio, then HATE pulls a Hijacked by Ganon on her disintegrating corpse and reveals itself as the true Big Bad and True Final Boss.
• Big Bad Friend: She initially poses as Frisk's friend in order to use him to further her own goals.
• Big Bad Slippage: Bete initially presents herself as a neutral entity within the story, but as more and more of her true nature gets revealed, the longer and longer she falls to the dark side, to the point of becoming outright evil by season 2.
• Big Bad Wannabe: After the grandiose show that she put on throughout the entire season, defeating hero after hero, she predictably falls after pushing one of her most powerful enemies one time too many (i.e. Gaster) to the point where he risks his own life and his son’s life just to obliterate her, and the result is that HATE, the true Big Bad, wipes her existence clean and disintegrates her corpse in order to create its own body.
• Black Eyes of Evil: When drawing on HATE's power, her sclera start to turn black, progressing more the more she uses it. When HATE has taken over completely during the Undyne the Undying fight, her sclera are entirely black. It happens again one final time after her death at the hands of an enraged Gaster.
• Body Horror: Her true form has the ability to grossly enlarge or transfigure her limbs into weapons, although this gruesome appearance is most prominent when her face takes damage. It gets so much worse for her in "Animosity", and not by her choice.
• Brainwashed and Crazy: Her modus operandi, since part 2 of Love, has been to resurrect previously dead characters and force them to fight the main cast while under her spell. Also applies for her; Agate corrupted her from the moment she woke up and she had no choice but to be evil with Agate's dark magic inside her. Later on, HATE possesses her when she is nearly dead, making her even worse.
• Brainy Brunette: Zigzagged. She's The Chessmaster and a Manipulative Bastard but her hair isn't always brown.
• Came Back Wrong: Invoked as part of the spell for her creation. Betty retains many traits of her former life as Amber, appearance and personality included, but the original Amber is long dead, and the pale imitation that is Betty exists solely to fulfill the mission she was created for. Then HATE possesses her carcass as its own new body and transforms it into something truly vile and horrifying.
• Character Death: Gaster reduces her to a fried, skewered, disfigured, disintegrating mess using "Polychromatism", a technique which inadvertently drew on Papyrus' life force. As Betty dies once and for all, she laments that she tried to hold back HATE, and that killing her was the biggest mistake the heroes could have ever made... shortly before HATE reforms her body as its own, obtaining all her powers and much, much more.
• The Chessmaster: Season 2 was the result of her playing Jessica and the heroes along into mistrusting each other so she could obtain a Hate sample from Jessica and kill all monsters.
• Cheery Pink: Pink is her primary color, and she shows herself to be quite energetic when Frisk first meets her. Even after revealing her true colors, she still retains her cheerfulness, if by showing it in a much darker context.
• Combat Tentacles: One of her favorite techniques. HATE seems to share the sentiment.
• Creepy High-Pitched Voice: She's vicious and generally speaks in a high-pitched voice.
• Cute and Psycho: Best demonstrated by her joy at Kumu being ready to continue the plan to absorb human souls.
• Curb-Stomp Battle: Gives one to Gaster at the end of Do or Die; gets a major one from Undyne at the start of Love.
• Disc-One Final Boss: Gaster finally brings about her long-awaited (and very excruciating) demise during "Animosity", only for HATE to hijack her body and transform it into its own form.
• Elemental Rock-Paper-Scissors: As the Pink Soul of Fear, she can be only defeated with Determination. This can be observed during her fights with Gaster and Undyne. While she's able to take Gaster's attacks to an extent, Undyne fueled by Determination demolishes her with little effort.
• Emergency Transformation: After being brought to the brink of death thanks to Undyne the Undying, Kumu uses the hate vial to help her recover.
• Even Evil Has Loved Ones: Despite her villainy, she truly cares for Kumu and is terrified when he takes a little too much damage from Gaster in Do or Die. Played with, however, as Kumu is actually a physical part of Betty; her concern is more out of self-preservation. Maybe (considering that she calls Kumu her only friend).
• Even Evil Has Standards:
  • After Kumu gives her the Hate vial, she finds that the HATE force is sentient and evil. It also doesn't make her feel like herself — she feels even worse, and that is definitely saying something. She's flat-out terrified of how evil it is and what it may want her to do - no doubt something even worse than what she is trying to achieve, and doubts that she can resist it for long - she feels as though her goals and her very being starts slipping away when under Hate's power.
  • In a canon conversation between herself and Kumu that can be found on Cami's Tumblr blog, despite her displaying nothing but malice and a wide Slasher Smile when she encounters anyone else, Betty confides in Kumu in secret that she has actual reservations about just how in the right they are with their plan, but feels as though she must go on in order to please her creator and make Frisk and friends pay for their own sins they committed in the past.
  • She wants to rule over humanity to keep them from making the mistakes they did in the past, not wipe them all out, and she finds the idea of another war between monsters and humans to be absolutely repulsive, which is the reason for her actions in the first place.
• Evil Cannot Comprehend Good: When a heavily-damaged Mettaton grabs Betty’s leg to hold her back from killing his co-workers, stating she has to finish him first, she is genuinely perplexed at this, asking him why he’s keeping at it despite clearly being outclassed by her.
• Evil Is Not a Toy: Betty learns this the hard way when HATE starts taking full control of her during her battle with Undyne.
• Eviler than Thou: Jessica had no chance of standing up to Betty... and then, surprisingly, the sentient HATE substance pulls an Eviler than Thou on her, briefly turning her into an insane puppet and vessel for which it uses to fight Undyne. Later on, after her death, it takes over her remains completely and creates a physical form for itself.
• Evil Gloating: She's evil alright, and she has her moments of gloating.
  Betty: (to Undyne the Undying) HA! You think your spears are stronger?
• Face of an Angel, Mind of a Demon: Cute on the outside, vicious on the inside. Though she loses the "Face of an Angel" part after she fuses with Kumu.
• Fantastic Racism: Shares this mindset with her creator, Agate, due to having been corrupted into seeing things her way. She wants to kill monster kind, believing that they are the root of the problem that was the first war between monsters and humans.
• Foil: To Chara, as the villains of their respective arcs. Chara was a Well-Intentioned Extremist, fueled by a strong negative emotion, who got hung up on the prospect of making humans suffer for what they did to the monsters. Betty, on the other hand, exists only to destroy the monsters, fueled by fear, and otherwise checks off the same Humanoid Abomination traits Chara had. They also have some of the same dialogue.
  Chara, to Frisk: How curious. You must have misunderstood. SINCE WHEN WERE YOU THE ONE IN CONTROL?
  Betty, to Jessica: I think you misunderstood. I wasn't asking. (...) Well, then... I'll just take it from you.
• Fusion Dance: Her soul was created by Agate's own soul emptying into nothingness and being filled with Fear before storing her creation inside of it, then merged Amber’s corpse with the Pink Soul of Fear to create Betty. Later on, her doing this with Kumu allows her to assume her true, monstrous form.
• Foreshadowing: Her very first appearance has her peering into Toriel's classroom with a rather devious look, and to add to that she seemed reluctant to introduce Kumu and wanted to keep him out of sight, fearing that they'd be discovered for what they really are.
• Freudian Excuse: Sadistic psychopath she may be, however the prequel comic and the conversations she has with Kumu outside of the episodes (all of which are canon) show that she is actually far more tragic and sympathetic than the animated episodes show her to be.
  • Betty was created and put to sleep for over 1000 years until Agate's spirit needed an excuse for her creation to wreak havoc on the planet to suit her own twisted agenda. Once Betty woke up, she fell under control of her creator's soul, who forced her own memories into a terrified Betty (and Kumu) and essentially brainwashed her, ordering her to fulfill her purpose. Betty had no choice in what she became, nor did she have any choice in how to live her life the way she might have wanted to. Had it not been for Agate forcing her to become a carbon copy of herself in terms of memories and wicked personality, Betty could have genuinely been a kind person and helpful ally to the heroes as she seemed to be at first.
  • Since she has the memories of Agate forcibly implanted into her, she has a good idea of just how terrible the war between humans and monsters was in the past and how it nearly ruined the planet.
  • She can also see into people's memories if she looks into their eyes, allowing her to realize that many of the main cast members (Frisk, Asgore, Asriel, Sans, etc.) all have their fair share of sins they committed in the past, seemingly further enforcing her creator's belief that monsters and those who sympathize with them are the true problem (despite how negatively skewed Agate's perspective is).
  • She must kill and steal souls in order to live. Draining them of their magic power provides it to her. If she were to run out of magic, she'd die extremely quickly.
  • Betty even acknowledges what a horrible person she is in her conversations with Kumu, and her dialogue paints a much sadder picture of her than the evil remorseless freak she seems to be in the animated series. She is only willing to do whatever it takes to fulfill her mission because it's what she was made to do without being given a choice, and she believes that the main cast are just as bad as her, hiding their secrets and crimes from the world.
    Betty: What am I?… Something made to be hated?… Looks like it… I never asked to be made… I didn’t ask to be this way… But it’s what I am. And here we are trying to fulfill our purpose despite our doubts… I know we don’t have other choice, you don’t need to remind me of that. Plus, we’ve already started. There’s no going back now. We gotta make mom proud… She told me you are and will be my only friend. That we can’t trust humans… that monsters are dangerous. That a civilization where the 2 races live together is just a time bomb waiting to go off. That we’re doing good by speeding up the process. She’s right… I’ve seen what they’ve done. As soon as I look at someone’s eyes, I can see straight to their souls, like a window. It shows me everything, good and bad memories. Frisk looked nice and innocent at first. But then I saw the horrible things they did to his so-called “friends”… Then I thought monsters would be different… I saw Asgore… Those poor children. Then I saw Asriel, I thought his son would be different. But he was also keeping his secrets… he looked cute as a flower tho. The small skeleton was no different. He watched it all happen at first. And only intervened at the end. Only to murder them until he lost count. Trying to pretend something they’re not. Ha! And they got angry with me for doing the same. Hypocrites. I can see why mom wanted me to do this. I’ll do everything I can to fulfill my purpose (...) hm? Sleep? What’s “sleep”? Oh… that human/monster thing… what about it? I don’t want to sleep… I… don’t know how to… So we’ll just wait for the sun to come out and we’ll do our thing ok? Just, get ready… it’ll be a long day…
• Genki Girl: She's cute, energetic, has pink hair, and is a villainous example.
• Hated by All: By the time the final battle between her, Gaster, Sans, and Papyrus comes, it's safe to say practically nobody likes her, human or monster alike.
• Hate Sink: A sadistic hypocritical mass murderer who demonstrates Fantastic Racism and incomprehensible illogical beliefs about why her actions are in the right, Word of God is that she was made specifically to be loathed, to the point where even Word of God absolutely hates her and thoroughly enjoyed killing her off in as gruesome a manner as possible. However, this is subverted if one subscribes to the Alternative Character Interpretation that she has been Brainwashed and Crazy for her entire existence.
• The Heavy: While she is the Big Bad of the second season, she is acting on her late mother and creator's orders and acts as a vessel which HATE can work its evil through.
• Hidden Depths: When Kumu is damaged, she seems genuinely terrified and is relieved to learn that he is recovering fast. She gets another moment where HATE increases her anger and she yells at Kumu for eating the whole vial — and then she looks truly miserable and sincerely apologizes to her pet before stating in a fearful tone that HATE is causing her to slip away from her original goal and she cannot control it for long. Almost makes her seem human. Almost.
• Hoist by Her Own Petard: Her last moments are spent lamenting that she will no longer be able to hold back HATE from taking full control... which wouldn't have happened if she hadn't stolen it from the lab in the first place (and if Kumu hadn't downed the vial).
• Humanoid Abomination: As an Artificial Human created from magic and Amber's body, she is neither human nor monster. She looks like a regular human (moodlight hair notwithstanding) when she and Akumu are separated, but in truth her body is completely hollow. When they're fused, she loses all illusion of being human, her skin practically melting to reveal monstrous teeth and claws underneath.
• Hypocrite:
  • Gets on the main cast's case for allegedly running from their mistakes and trying to justify their past crimes nigh constantly when she herself possesses an ironclad Never My Fault attitude and justifies all her murders and torturing of innocents with what basically amounts to Utopia Justifies the Means.
  • She claims that the main characters only oppose her plan because they can't see that their vision of monster- and humakind living together will never come true and that they're just fooling themselves, but that is actually exactly what she's doing - she holds on to a flawed ideology that would never work out in practice and either kills or horrifically maims everyone who opposes her.
• "It" Is Dehumanizing: Betty is commonly dehumanized and called "it" and "that thing" by all the characters because of her horrible, horrible actions. It still comes across as mean of them all anyway, if only because no other character gets this treatment, and it gets even worse if one considers that she may never have been in control to begin with.
• I've Come Too Far: How she secretly feels after her and Kumu's murder of Sans, as she confides to Kumu in secret. It's also not helping that Agate made her specifically to have a copy of her own memories to think in almost exactly the way she does.
• Killed Off for Real: Well done, Dr. Gaster. Well done. "Polychromatism" reduces her to a gory, disintegrating husk... just in time for HATE to take the stage.
• Know When to Fold 'Em: While she's not afraid to fight powerful opponents head-on, as soon as she realizes the situation has turned against her, she will flee without ceremony. Gaster kills her in part because he uses his hands to hold her so she can't escape.
• Kryptonite Factor: Betty normally has Akumu to function as a nigh-impenetrable shield, but anyone weaponizing Determination will cut through it like butter. Pre-fusion, Betty herself is as squishy as any other human and even with Hate's Healing Factor is entirely killable, so anyone wielding Determination has a much easier time fighting her.
• Laser-Guided Karma:
  • She tricked Undyne into killing Alphys. Undyne becomes her Undying form and hammers Betty into the pavement with her Spear of Justice, knocking her out cold and causing her body to start crumbling away as well as requiring Kumu to absorb the Hate vial to revive her. She was that close to dying.
  • She tries to make Sans and Gaster back off by holding Papyrus hostage - only for Sans to brutally kick her across the room and Gaster getting even more pissed at her than he already was.
• Look Both Ways: This is basically how Frisk first met her; by saving her from a speeding vehicle while she was carelessly walking down the street.
• Logical Weakness: Her special ability, Rhabdophobia, is great for fighting monsters like Gaster who exercise Quality over Quantity in their magic, but heavily outclassed against monster who prefer the opposite like Undyne. She crushes Gaster with his Duality-enhanced blaster and hands, but Undyne counters her stolen spears by making a lot more. She also can't use it multiple times in a row, which is one reason the above happens. It's also one reason Gaster is able to kill her.
• Magic Eater: Camila states she and Kumu need to feed on magic to survive.
• Manipulative Bastard: She tricks Undyne into killing Alphys, sets up a gambit that allows her access to one of the most powerful monster souls in existence, tricks Frisk into showing her how to hit the monsters hard, manipulates Jessica into facilitating her plans, and keeps messing with the heroes even after her Evil All Along reveal.
• Master Actress: She fools several characters into thinking she's an innocent Nice Girl.
• Master of Illusion: To the point of fooling the audience. The Pink Soul of Fear lets Betty create powerful illusions on command.
• Meaningful Name:
  • Bête Noire, a term that refers to something that one extremely dislikes. Literally translated, it means "black beast."
  • Her true name, Amber represents the original color of her "mother", Agate (Wizard of Bravery). The twist is that while Betty may be the "child" of Agate, Amber is not — she's her younger sister.
• My Death Is Just the Beginning: During her last living moments, she muses how the heroes killing her might have been their worst mistake yet, because now there's no-one left to hold back the Hate inside her, which will now probably go on an indisciminate killing spree, although she is not particularly happy about this either, given that she laments that the murderous entity won’t stop until nothing is left.
• Names to Run Away from Really Fast: Bête Noire is translated as "black beast".
• Nice Job Fixing It, Villain: Moderate version. It's likely that her sound-only torture of Ms. Grey and taking the form of her dead daughter to manipulate her is the reason Ms. Grey turned to the side of the protagonists, giving them vital information to help in stopping Betty.
• No Biological Sex: Although she often refers to her with feminine pronouns, Word of God says Betty is technically genderless. Given she's actually an artificial construct created to ensure there would always be war between humans and monsters, it makes sense.
• No Body Left Behind: After HATE consumes her remains in a massive explosion.
• Not So Invincible After All: Bete spends most of season 2 constantly outsmarting the heroes, and even when she comes close to being defeated, she either gets away or something happens that lets her live another day. And then Undyne the Undying shows up, and gives the girl a very brutal reality check.
• Obliviously Evil: In the Glitchtale S2 Prequel comic, Betty starts off as a nice person merely curious about her surroundings, but quickly changes when Agate's Black Beast programming kicks in, suggesting that Agate's spirit corrupted her with all the negativity of her own soul.
• Obvious Rule Patch: Her entire existence roughly works as one of these for the Undertale-verse. She's literally a checksum, a process a game uses to see if there are any conflicting values in the game. And since Frisk created a very glitched timeline, a respectively powerful correction needed to be made...
• One-Winged Angel:
  • She impales both Kumu and herself with her spear, merging both of them together into one being, her eyes glowing completely pink, her voice becoming deeper and beastly, and giving her the ability to morph her arms into giant weapons and grow demonic pink wings over twice her size, as well as being able to summon her scythe freely. Makes sense, considering that they were two halves of one being.
  • When Mettaton burns her skin off with the stage lights, her true body is shown to be a pure pink humanoid being resembling a cross between an even scarier version of Kumu and Agate, taking the long hair into consideration.
• O.O.C. Is Serious Business:
  • She is scared out of her mind when fighting Undyne and gives a real scream of horror when Undyne's Spear of Justice strikes her dead-on, knocking her out and nearly killing her. Her fear (ironically her personal trait) only increases when she realizes that she cannot control HATE — rather, it is gaining power over her, and for the first time in the series, she looks vulnerable and sympathetic.
  • Happens again when Sans is rescued from HATE by Papyrus. Betty and Kumu are weakened and instead of screaming in rage or taunting the heroes as she leaves, she becomes very quiet and whispers to Kumu that they're retreating before departing without a fuss. This is because she is too weak to resist HATE or defeat the combined group after her barrier breaks.
  • Happens one final time when Gaster brutalizes her, causing her to scream in terror in her final moments before bitterly reflecting on her failure and everyone's impending doom in the form of HATE.
• Pink Means Feminine: She's a Girly Girl who has pink as one of her primary colors, the other being purple.
• Power Dyes Your Hair: The more souls Akumu absorbs, the pinker Betty's hair gets. It also gets pinker the more scared she is, as her trait is Fear.
• Powered by a Forsaken Child: Agate created her from Amber's corpse shortly after killing her.
• Power Parasite: Her special attack, Rhabdophobia, lets her steal her opponent's active magic. Fittingly, the term translates to "fear of magic".^note Or "fear of being beaten by sticks or rods," but that's less relevant
• Psycho Pink: She's a violent, cruel, and unstable Bitch in Sheep's Clothing who has loads of pink.
• Purple Is Powerful: While mostly pink, purple is visible in her color scheme, and she's a Humanoid Abomination that requires the likes of Gaster and Undyne the Undying to put a dent on her.
• Rasputinian Death: Betty's demise by Gaster's hands can only be described by this; Betty's first attack on Gaster is countered by his Determination hands before she tries to take him out with tendrils from her fingers, only for Gaster to slice them apart with his Integrity saws before pulling her closer with a Patience string and following up with blasts from two Justice hands which Betty managed to block. After Gaster asks if her first attack was all she had, he activates Polychromatism and rips Betty's legs off, while skewering the rest of her with Perseverance needles before crushing her with one of his Duality hands. Gaster followed up the attack by firing his Gaster Blaster from above her, causing her to scream in agony before he fired everything at her, reducing her to a hollow, lifeless shell.
• Really 700 Years Old: Betty was created from a girl named Amber, who was murdered by her sister, and sealed for centuries until Asriel freed the Underground.
• Reluctant Psycho: She seems to enjoy every second of her brutal mass murders in the episodes, grinning and cackling as she kills everything in her way... however, if we are to go by her conversations with Kumu, she is secretly aware of what kind of malevolent creature Agate made her to be (essentially a copy of Agate's own personality) and is not happy about it but resigns herself to the fact that she is unable to change, owing to the nature of her creation.
• Retcon: The prequel comic in which she and Kumu emerged separately has been "kinda" retconned according to Word of God, implying that it was changed to make her emerge in her true form first before separating.
• Rose-Haired Sweetie: Subverted. Betty's hair has shades of pink at the tips, with it becoming full on pink at certain points later in the story, and she initially seems like a sweetheart, but it doesn't take long before she reveals her true colors and proves to be more of a Psycho Pink girl herself.
• Sadist: She laughs when Jessica attacks Sans, makes a Slasher Smile after (and probably before) stabbing Gaster In the Back, etc.
• Single Specimen Species: According to Word of God, she's not just named Bête Noire, but that's also her 'species' name. At least one other one has existed before her, but much like the Soul of Determination, only one Bête Noire can exist at any one time.
• Slasher Smile: Is about as bad as Chara with these. Until she fuses with Kumu. Then she's far worse.
• Stepford Smiler: See Freudian Excuse and Woobie, Destroyer of Worlds.
• Tragic Villain: Surprisingly, yes, given that she never had a choice in becoming evil and was specifically made that way as a vessel for Agate’s twisted soul. See Freudian Excuse, Brainwashed and Crazy and Woobie, Destroyer of Worlds.
• Used to Be a Sweet Kid: When the Barrier first came down and Betty was spawned, she seemed genuinely cheerful and innocent, and even scared of Kumu before he was quickly revealed to be just as friendly as her. That all changed when Agate's evil spirit forced her own memories into Betty's brain and soul, corrupting her, possibly irreversibly.
• Villain Song: "Scared of Me", available on the channel.
• Villainous Breakdown: Several examples.
  • She loses her mind when she realizes how powerful Undyne the Undying is.
  Betty: WHY IS SHE SO STRONG?! SHE SHOULD BE DEAD! (later) WHY DOES IT FEEL LIKE SHE HAS DETERMINATION?! ... MONSTERS CAN'T HAVE DETERMINATION!
  • She has another one in a comic that takes place shortly before she merges with Kumu, in which she finds a piece of her skirt under a pillar (originally Amber's skirt, bearing the original color) as well as the bones of her creator, causing her to absolutely lose her mind before attempting to calm herself and state that she herself can't die in this body and will succeed to save the human race.
  • Her final one comes from Gaster literally tearing her apart and blasting her into oblivion. She screeches her lungs out shortly before her demise.
• Walking Spoiler: Not much can be said that wouldn't give away the fact that she is Season 2's Arc Villain.
• "Well Done, Daughter!" Girl: Sorta. Betty views Agate, her creator, as her mother (which Word of God says she is in a sense) and a conversation with Kumu reveals she wants to make her proud.
• Well-Intentioned Extremist: Make no mistake, Betty does not do a good job of showing it, with her constant horrific Slasher Smile and joy in taking souls for her own gain, but she at the very least claims to want to save humanity by getting rid of monsters (whom her creator believed responsible for the first war) and keeping humans in line to prevent a second world-devastating war between the two races, and she'll do whatever it takes to make that dream a reality.
  Betty: Just killing a couple hundred to save thousands.
• Woobie, Destroyer of Worlds:
  • She was created when Amber Lightvale, Agate Lightvale's human sister, was murdered and her soul shattered, then her body was imbued with a soul of Fear to "revive" her, essentially erasing her old self and taking away any chance of her or Kumu being remotely heroic and changing her from seeing Agate as her sister to her "mom". The prequel comic even shows that Betty was a genuinely cheerful and friendly girl, oblivious to her purpose until Agate's spirit corrupted her on the spot. Camila states that Amber’s soul cannot come back, meaning she is stuck as the Black Beast against her will for good. That said, even as Betty, she could still have been a genuinely good person and lived a happy life with Kumu if Agate hadn’t corrupted her after she woke up. While in hiding with Kumu, she finally drops the crazy psychotic demeanor and sadly laments that she has no choice but to be hated and feared by everyone and that she didn't ask to be made this way, but feels as though she must continue in order to stop another potential war.
    Betty: What am I?... something made to be hated?... looks like it...
  • On top of all that, she dies absolutely horrifically without getting the slightest chance of redemption or freedom from the control and copied personality/memories of her creator - in fact, nobody in the story even knows about the possibility of her lack of free will, and nobody has any time to remark or reflect on her demise or what she was truly trying to achieve as HATE makes its appearance.
• The Worf Effect:
  • Outside of Gaster, Undyne the Undying, and Hyperdeath Asriel, Sans is the most powerful monster in the Underground. Betty manages to manipulate the events of the story to take him out with no effort and give his soul to Kumu. Gaster himself quickly follows suit due to her Rhabdophobia attack. Then Undyne the Undying manages to worf her instead with zero trouble, even after she becomes possessed by HATE.
  • It happens to her again when Gaster unleashes Polychromatism on her, reducing her to a broken, bleeding and very much deceased shell of herself.
• Wounded Gazelle Gambit: The car that Frisk "saved" Betty from was actually one of her illusions. She faked the danger to get into their friend circle.

Akumu

voiced by: Strelok

The manifestation of Betty's unique soul, serving as her Guardian Entity of sorts.

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• Blob Monster: He's a floating pink ball of goo that can take on a variety of shapes.
• Bond Creatures: He and Betty are two halves of the same being, and even separated maintain a spiritual link. The more souls Akumu devours, the stronger Betty's magic becomes.
• The Dragon: To Betty.
• Dragon-in-Chief: Played with initially. Betty is far from incompetent, but Akumu is the power that Betty uses to form all of her attacks, and she needs him to devour enough souls in order to complete their plan. Once Betty absorbs him, she gains her full power.
• Doppelgänger Attack: Akumu is capable of making other creatures that resemble pale versions of itself, which are also capable of absorbing souls to make Betty and himself stronger.
• Eldritch Abomination: Like his partner, Akumu is not a monster in the technical sense, foreshadowed by his ability to draw power from both human and monster souls.^*In Undertale canon, humans can't absorb human souls, and monsters can't absorb monster souls.
• Elemental Rock-Paper-Scissors: Is able to tank Asriel's and even most of Gaster's attacks without taking damage, but during the fight against Undyne, her spears punch through Kumu's body like wet tissue paper, thanks to her Determination (the only force that can defeat Fear).
• Even Evil Has Loved Ones: Betty, of course, being his "owner". When Undyne nearly kills her, he frantically attempts to wake his unconscious mistress before deciding to down the HATE vial as a Desperation Attack to revive her.
• Fusion Dance: Double subverted. It looks like Akumu enters Betty's body to give her a power boost against Gaster, but it's another of her illusions — Akumu is mimicking her appearance while the real one, using her illusions to turn invisible, is attempting a Back Stab. It then happens for real later on, making it a stealth Call-Forward.
• Hero Killer: Sans is his first on-screen victim, followed by Asriel a couple episodes later.
• Killed Off for Real: As he is part of Betty's true form, when Gaster finishes her off, Kumu dies with her.
• Magically Inept Fighter: Despite munching down on a large number of monster and human souls to fuel him with, Akumu has not been seen to weaponize any magic. He only fights physically.
• Magic Eater: According to Camila, he has to feed on magic to survive.
• Meaningful Name: Akumu means "nightmare" in Japanese.
• Morph Weapon: He shapeshifts into bladed weapons for Betty to wield, most commonly a scythe, though he has also taken the form of a type I Blade Below the Shoulder.
• Names to Run Away from Really Fast: The name means "Nightmare" in Japanese, fitting it as a Fear monster.
• Super-Toughness: He can shrug off attacks from Asriel and even Gaster. To give a sense of scale, Gaster required a significant power boost combined with a Fantastic Nuke to do any lasting harm, and even then he recovered quickly. He uses this durability to act as a living shield for Betty.
• Voluntary Shapeshifter: He can change its color as well as its shape, pulling an impressive mini-copy of Betty before revealing its actual face in Do or Die.
• Walking Spoiler: Is as bad as Betty.
• Would Hurt a Child: One of the targets in Akumu's major attack on the city is an elementary school. One of his blobs kills Cam while aiming for his younger sister.
• The Worf Effect: When Kumu turns into a shield, it's normally impenetrable. Undyne the Undying breaks through it like glass.

Kumuzilla

A Fusion Dance of all the Pink blobs Betty and Kumu created throughout Season 2. It stores a massive amount of Fear energy inside itself, and goes on a rampage throughout the city.

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• Body of Bodies: It is an amalgamation of every single Pink Creature that Betty and Kumu made over the course of the series.
• Dragon-in-Chief: In the sense that, if it dies, Betty loses an insane amount of stored magic power, making it far easier to finish her off once and for all... unless HATE has anything to say about it.
• Eldritch Abomination: A terrifyingly massive Lovecraftian beast with the ability to tank everything thrown at it.
• Fusion Dance: It is comprised of at least 600 Pink Creatures total.
• Kaiju: It towers over the city.
• One-Hit Kill: Undyne the Undying's new Spear of Justice one-shots it instantly.
• Nigh-Invulnerability: Gaster, Jessica, Ronan and Undyne couldn't even leave a mark. That is, before Undyne transforms.
• No Body Left Behind: There is absolutely NOTHING left behind once Undyne hits it with her giant red upgraded Spear of Justice.
• The Worf Effect: At first, Undyne, Ronan, Gaster and Jessica can't even scratch it. Then True Hero Undyne uses her giant red Spear of Justice.

HATE (Heavy Spoilers)

^{Physical Form 1}

^{Physical Form 2}

^{Physical Form 3}

HATE leads to suffering.

A malevolent — and very sentient — force of evil that serves as The Corrupter to Chara after Frisk takes a Genocide Run too far. Asriel SAVES Chara and purges HATE from them... only for it to be captured by the AMD and later released by Akumu to save Bete Noire during her fight with Undyne. However, HATE does not take kindly to being used... rather, it prefers to be the one pulling the strings.

---

• Achilles' Heel: It has one major weakness: love (the emotion), being its antithesis. Asriel and Frisk were able to use it to purge it from Chara, and Papyrus uses it to free Sans from Betty's control. This causes Frisk to realize that only love can defeat hate.
• Alas, Poor Villain: Before, it was merely a creature of pure evil. Throughout its final battle, it seems to gain emotions from its past hosts until at the very end it calmly accepts its fate, looking almost sad.
• All Your Powers Combined: In the final battle, it manifests multiple trait attacks at once - pink (Fear), red (Determination), and corrupted darker variants of cyan (Patience), blue (Integrity as well as soul control), purple (Perseverance), orange (Bravery), and yellow (Justice).
• The Archmage: It seems to possess a mastery over several corrupted traits, if not all of them, including Determination and Fear.
• BFS: Near the end of the fight against Chara, it creates a massive red sword, not unlike a larger version of the one used by Frisk and occasionally Chara.
• Big Bad: For the entire series, being the living culmination of the darkness in Frisk after gaining LV in Genocide. Then it's revealed that Agate ordered Betty to use HATE to complete her goal in the past, implying that HATE has been around for far longer than Frisk has, and his LV merely ended up summoning/generating/spawning it within both himself and Chara. It pulls a Hijacked by Ganon on Betty, cementing it as THE Big Bad of Glitchtale in its entirety.
• Caps Lock: How its name is spelled.
• Combat Tentacles: It spreads these all over the nearby buildings as it grows its lower body mass, making them resemble black veins.
• Create Your Own Villain: Played with. Frisk unwittingly brought HATE into existence upon executing the very first glitch in the story: breaking free from Chara. Since Frisk was dead before the reset was allowed to happen, the Hate jumped to the nearest host, that being Chara. This ended up causing all of the bad things in the series, and Frisk is fully, painfully aware of it. However, going by Agate's instructions to Betty, HATE may have been around for far longer than Frisk, and the latter merely spawned it into the present day in his current timeline.
• The Corrupter: A variant mixed with The Corruption. The trade-off for allowing it to enhance SOUL power is that it gradually kills the emotions and will of the user until it can ultimately take control. Even Chara, Betty, and Akumu, all characters who are on various levels of Humanoid/Eldritch Abomination, are not exempt. When Betty decides to bring back Sans, she empowers him with HATE and turns him wicked until Papyrus manages to break through to him. She then does the same to Asriel, allowing HATE to inhabit a new vessel until Chara frees Asriel and HATE decides to use Betty's remains instead.
• Curb-Stomp Battle: Chara and Asriel land multiple blows on it, but it just keeps smiling the entire time and they don't manage to come anywhere close to defeating it, even together, and it leaves Chara near-death before it shatters Asriel's soul... but he refuses to die. Then, as the God of Hyperdeath, he and Chara finally manage to turn the fight around.
• Dark Is Evil: The Black trait and a Made of Evil demon incarnating Hatred.
• Eldritch Abomination: Hands down the biggest example in the series, HATE is shapeless, twisted and unfathomable, alien from a psychological, physical and magical standpoint, being at the same time a fully sentient trait and an enhancer. Descriptions made by fans, upon which, Camilla Cuevas has given his approval drive this point home. See here for some of them. It becomes Humanoid in "Animosity".
• Evil Is Not a Toy: It has no trouble overriding Betty's control over her body, possessing her to battle Undyne itself. It does so again after her death at the hands of Gaster, demonstrating how and why it's a far worse threat than she ever could be (or would dare to be).
• Evil Makes You Ugly: Covers its puppets' skin in a horrible black substance. Even Sans, a monster with no skin to begin with, has hate show up in places around his body, in the forms of tar-like blobs on parts of his body. It transforms Betty's remains into a horrifying monstrosity as its own new form.
• Eviler than Thou: When Akumu absorbs it into himself and his mistress, she gets a massive power boost, but it seems to have a negative effect on her mental state. Betty is terrified that it might be controlling her, and for good reason — she says it's sentient. It makes good on this by taking her remains over completely after her downfall.
• Face Death with Dignity: As HATE is dying, it attempts to kill Asriel until Chara steps in between them to block the way, causing HATE to stop and accept its fate.
• Final Boss: Of both seasons, and probably for the entire series chronologically.
• Generic Doomsday Villain: Betty wants to "save" Earth by ridding it of monsters and ruling over humanity so as to prevent another devastating war (or at least, that's what Agate told her). HATE wants to gleefully obliterate everything in existence.
• Glowing Eyes of Doom: After it appears in physical form.
• Good Hurts Evil: Being Hatred incarnate, its one major vulnerability is its antithesis: love, hence why Papyrus broke its control over his brother.
• Greater-Scope Villain: Where to begin? Agate, herself a Greater-Scope Villain to Bete Noire, ordered the latter to make the world fear her, and if it wouldn't be enough, HATE would most certainly give her the power needed to finish the job. Chara's evil actions were entirely its fault. In the present day, it's manipulating Betty and Akumu to abandon their current Evil Plan and go for its own. In "Animosity", it becomes the full-on Big Bad when it gains physical form and starts emanating its power through the entire city.
• Green Thumb: It's origin story shows it started as a black rain that spread The Corruption among the leaves of some kind of World Tree that represents humanity.
• Healing Factor: An absolutely insane one to the point where it regenerates from Animosity! Chara and God of Hyperdeath Asriel's attacks in mere milliseconds.
• Hijacked by Ganon: Betty's final fate is to have her disintegrating corpse taken over and exploded before the remaining magic is transformed into the body of HATE itself.
• Horrifying the Horror: Betty is full-on terrified of it when it starts overcoming her.
• Humanoid Abomination: It starts off as this once it gains a physical form in "Animosity", then its lower body transforms into a black mass of physical magic and Combat Tentacles, and then it goes back to this later in its fight against Chara.
• The Man Behind the Man: Every antagonist in the series has been affected by it one way or another.
• Nightmare Face: After gaining a physical form, it manages to one-up every single villain who's ever done a Nightmare Face before.
• No Body Left Behind: Once it finally runs out of power, it dissolves into the night sky.
• Omnicidal Maniac: It desires nothing less than the complete erasure of everything and everyone.
• One-Winged Angel: Essentially what it does to its hosts. ESPECIALLY in "Animosity". Then it goes through multiple phases of Voluntary Shapeshifting in "Hope" to keep the advantage over its opponents.
• Our Demons Are Different: Not literally, but it's the closest it gets to a demon in malevolence, nature and powers.
• Physical God: It takes the full power and combined efforts of Animosity! Chara and God of Hyperdeath Asriel to stop it, serving as a Book Ends to when the two fought each other at the end of Season 1 with those same powers (except HATE was controlling Chara back then), and it ends with Asriel and Chara back in their normal forms and completely defenseless and HATE slowly disintegrating, only calling off its final attack when it sees the display of brotherly love from Chara standing in front of Asriel and guarding him, realizing that it's finally beat.
• Puppeteer Parasite: It can greatly enhance someone's magic and gradually take complete control of them, but has no power by itself. The AMD were able to capture it during the gap between seasons 1 and 2 because of this.
• Red Eyes, Take Warning: It is commonly depicted as having red eyes when on its own. It gains Betty's pink eyes as a variation once it reconstructs her body into its own, before going back to playing this trope 100% straight while chasing after Chara.
• Sealed Evil in a Can: The AMD managed to contain it in a vial after it escaped the Underground... until Kumu ate the entire vial, that is. As of right now, HATE is technically "sealed" in both Betty and Asriel, however, if it were to override Betty's control, then everything would instantly go From Bad to Worse. Predictably, it does.
• Sentient Phlebotinum: And Toxic Phlebotinum. Hate is a fully sentient (and evil) form of Wild Magic that symbiotically bonds with a soul and grants them power in exchange for possessing and eating out at them.
• Slasher Smile: It has a perpetual one going full-blast the moment it creates a body for itself.
• Smug Super: It's grinning the entire time it plays along with Chara and Asriel's games because it knows how powerful it is.
• Super-Empowering: It can amplify its host's magic by a factor of ten, at the cost of eroding their SOUL.
• The Power of Hate: If its name wasn't a clear indicator, it is this trope personified.
• The Stars Are Going Out: Its explosive entrance causes the entire sky to shift to an ominous black and pink glow, hiding the stars from view. This changes to black and red when it begins using determination attacks. The stars return and disappear again as the tides change until HATE's final destruction, when the night sky and the stars shine brightly at long last.
• The Unfought: Sort of. It never fights the heroes without inhabiting a proper host like Chara, Betty, or Sans. This is then subverted in "Animosity" when it transforms Betty's remains into a physical form of its own, giving it access to all her powers and more.
• Unseen Evil: The series' Greater-Scope Villain and it has no true form; however, it turns its victims black as a sign of possession. It finally creates a physical form for itself in "Animosity."
• Villain Override: Possesses a dying Bete Noire to use her as a puppet, picking up her fight against Undyne the Undying. It does this again in "Animosity", finally destroying her body and using her remains to assemble its own body.
• Voluntary Shapeshifting: It uses this to great effect during the final two episodes.
• Walking Spoiler: Naturally, being the driving evil force behind the entire story.
• Wild Magic: Wild Black Magic to be precise. HATE is a very powerful and fully sentient "trait" who can have wants and plans and as shown in cut content, even speak and have opinions. It also doesn't like being controlled, due to being a sociopathic megalomaniac who wants complete control over whoever possesses it.
• World's Strongest Man: By the time they are done fighting it two-on-one, Animosity! Chara and God of Hyperdeath Asriel are completely out of energy and both revert to normal, and it still nearly kills Chara anyways with its last attack, yet a sudden emotion sparks inside of it at the sight of its opponent defiantly shielding his brother with his body... and it gives an almost sad expression before it stops resisting its dissolution.
• World Tree: It started out as The Corruption of one that seems to represent humanity.

Prequel Main Characters

Copper Lightvale

Agate Lightvale's twin brother and the Wizard of Determination.

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• Ascended Extra: In the original game, he was just one of seven nameless human wizards. Here, he plays a greater role in how events prior to the story play out, including Betty's origin.
• Big Brother Instinct: Played with. He's willing to fight Agate, his twin sister, to protect Amber, who may or may not be related to him but is certainly family in spirit. When the latter dies, he loses his will to live.
• Cain and Abel: The Abel to Agate's Cain.
• Determinator: Implied, as it's his SOUL trait, though we never get to see him showcase it.
• Heroes Prefer Swords: A red one made of magic, similar to what Frisk uses.
• Irony: Copper is more than willing to show Agate mercy, which is required to get Undertale's Golden Ending; here, however, it backfires horribly.
• Posthumous Character: He's dead well before the events of the main series.
• Suspiciously Similar Substitute: Kinda; he resembles Frisk and Chara, though he was conceived later but existed first chronologically.

Amber Lightvale

Copper and Agate's younger sister; they raised her after their mother died in childbirth.

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• Back from the Dead: This only applies to her body, not her soul, which was shattered in order to be replaced with the soul that would eventually belong to Bete Noire.
• Came Back Wrong: With her soul gone, Amber's body now belongs to Betty - and apart from appearance (inverted colors not withstanding) and cheerful personality, they are nothing alike - Betty isn't even human.
• The Cutie: Young, adorable, and upset about her siblings fighting.
• Curtains Match the Windows: A notable aversion among the human characters: her hair is blue while her eyes are green. Interestingly, there's also a scene where she's showing her soul to Copper, which is cycling through two traits... Integrity and Kindness.
• Innocent Bystander: She had nothing to do with Copper and Agate's conflict. Agate killed her to break Copper's determination.
• Kill the Cutie: Agate did so in order to break Copper's spirit and use Amber's body to create Betty.
• Palette Swap: She looks a good deal like Betty, except with blue hair and green eyes along with different clothes. That's because she is Betty, in a way — while the real Amber is dead and not coming back, Agate merged her corpse with the Pink Soul of Fear to create Betty.
• Posthumous Character: She died a long time ago, and her corpse was turned into Bete Noire.

Roy Goldburn

One of the Seven Wizards who created the Barrier. Brother of Shane.

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• Trauma Conga Line: Even before the prequel started, he was shown to have it very rough. He's implied to have had a falling out with Asgore and one of his friends and fellow Wizards, Stelle, tries to kill the King, forcing him to kill her.

Shane Goldburn

voiced by: Dr.EojPuerte

One of the Seven Wizards who created the Barrier. Brother of Roy.

Rin Winterway

One of the Seven Wizards who created the Barrier. Was the wizard of Patience.

Mila Rutrow

One of the Seven Wizards who created the Barrier. Was the Wizard of Kindness.

Cody Fallenfire

voiced by: Lumisau

One of the Seven Wizards who created the Barrier. Was the Wizard of Integrity.

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• Child Prodigy: Downplayed. He's shown to be very good at creating Integrity platforms even as a child, but they break easily at first. Nonetheless, this convinces Stelle to help train him.
• Dark and Troubled Past: Was trained by Stelle, the former Wizard of Integrity, and was going to go to the floating islands in the sky together with her. Then he ends up waiting days for her to no avail, and learns from Roy her true nature. This is shown to have affected him greatly in the end.
• Morality Pet: Ultimately to Stelle. While it didn't stop her from trying to murder the King, she leaves a message for Cody on the floating islands for him to find after she's gone, implying that she truly did care for him and knew he would make it up there.
• Was It All a Lie?: Asks himself this about Stelle, questioning if everything she tought him is a lie and if by extension everything he is now is false. He breaks out of it in the end, declaring that no one else should define who he is.

Kanashi

A character from the prequel whose entire town was slaughtered by a being known only as Miasma.

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• Dark and Troubled Past: Most of his village was murdered by Miasma's poison/plague magic when he was little.

Prequel Villains

Agate Lightvale

^{Click here to see Agate corrupted by Fear.}

The twin sister of Copper Lightvale, the Wizard of Determination, who was one of the wizards who closed the barrier along with her brother.

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• Ambiguous Situation:
  • Word of God states that Betty and Agate are technically the same person, considering Betty has Agate's soul as well as her memories, and upon finding Agate's skeleton undergoes a Villainous Breakdown and tries to assure herself that she can't die in "this body", making it seem as though Agate's personality is taking her over. However, for the most part, Betty refers to herself and Agate as different people, calling Agate "Mom". In addition, the prequel comic shows Betty as a cheerful and innocent person before Agate's soul inside of her corrupts her and fills her with Agate's own evil.
  • It’s unclear whether she chose to become evil without positive emotions, or if she didn’t know that reversing her trait would do such a horrific thing to her.
• All for Nothing: Kind of a given now that despite all she did, Betty is now dead and HATE took centre stage.
• Ancient Evil: Was one of the original wizards who sealed monsters away, but is still a dangerous threat even beyond the grave, centuries later.
• Big Bad: In "Glitchtale Origins".
• Cain and Abel: She was the Cain to her brother, Copper, who was the Abel.
• Cool Big Sis: She was one at first, but after her Face–Heel Turn she turned into something worse than a Big Sister Bully.
• The Corrupter: For Bete Noire.
• Curtains Match the Window: Her eyes change color along with her hair.
• Dangerous Forbidden Technique: Changing her trait to Fear after losing her trait of Bravery. It allowed her to create Bete Noire at the cost of her own life.
• The Dark Side Will Make You Forget: Originally wanted to keep the Barrier in place to save both species from a potential war, but after becoming the Wizard of Fear, her motives basically turned into a desire for genocide on the monsters out of sheer hatred.
• Deader than Dead: She has no chance of returning through inhabiting a puppet now that her vessel has been consumed by HATE.
• Demonic Possession: Strongly hinted in "Hate", as when Betty is holding back a fire attack from Asgore, what seems to be Agate's evil spirit is looming behind her.
• Disproportionate Retribution: In response to her brother doing something as simple as beating her in a battle, she becomes a genocidal maniac who murders her own siblings. She may have lost her magic during the battle (as she was demoralized from her trait,) but it hardly makes her more sympathetic since other characters like Jessica Grey have managed to regain their traits after something as simple as getting a pep talk.
• Face–Heel Turn: At first, she loved her family and opposed her brother (who wanted to take down the Barrier) because she was afraid that a war would start up again if the monsters were freed. However, after she lost a duel to Copper and lost her Bravery afterwards, her desire to prevent humans and monsters from meeting grew into an obsession, in the pursuit of which she killed her sister Amber, then Copper when he hit the Despair Event Horizon over Amber's death, before creating the Pink Soul of Fear and using it to transform Amber's corpse into Bete Noire.
• Greater-Scope Villain: Bête Noire would never have existed, let alone be the way she is now if not for Agate and her insane and petty desire to "win" and prove her views on the world to be "correct", even long after her passing.
• Hate Sink: Most of the villains (including Season 1 Chara and even Betty herself) are either tragic or an Anti-Villain (if not both). Agate, on the other hand, is a petty sociopath and child killer. However, if one subscribes to Alternative Character Interpretation, she may not have intentionally removed all positive emotions from herself.
• Lady of Black Magic: As the Wizard of Fear. Bete Noire was the result of her merging the Pink Soul with Amber's corpse.
• Laughing Mad: When she turns her soul pink.
• Motive Decay: Agate thought at first that it was better for monsters and humans to remain separated to keep them from warring again, but after she lost her Bravery, she stopped caring about potential wars and obsessed over keeping the races separate, to the point where she wanted to kill all monsters to halt any potential future interactions if the barrier was broken.
• Not Quite Dead: Only in the sense that the soul that used to belong to her is still around as part of Betty. This allows Agate's spirit to stay in the world of the living and keep control over her puppet. When Betty takes Asgore's magic into her own hands, we get a shot of Agate's spirit rising from behind her.
• Posthumous Character: Since she died long before the events of the series. Although a mysterious orange haired woman has shown up occasionally, she was a hallucination made by Betty. However, Agate's spirit may have appeared for real in "Hate"...
• Put the "Laughter" in "Slaughter": If her laughing after killing Amber says anything.
• Power Dyes Your Hair: It's normally orange, reflecting her soul trait of Bravery. After she loses her duel with her brother and her trait along with it, it turns gray. After she loses her mind and attacks her brother again, it's brown, indicating the original soul of FEAR. After she perform the Bete Noire spell, it turns pink, and remains such as she dies.
• Psycho Pink: Her hair and eyes eventually turn pink. And this was after she killed both of her siblings.
• Sadist: She's clearly enjoying herself when she kills Amber and Copper.
• Sibling Murder: Killed both Amber and Copper (her siblings), before turning the former's body into Bete Noire.
• The Sociopath: After turning evil she has absolutely no redeeming traits and no semblance of a conscience.
• Sore Loser: She's humiliated and even runs away after Copper beats her.
• Token Evil Teammate: Of the wizards, though not originally. Before her loss of Bravery and slide into insanity, she was a fairly nice person who loved her family and wanted to keep the monsters imprisoned for their own safety. But after her loss to her brother, that all slipped away and she became a madwoman willing to kill both Amber and Copper and create Betty from Amber's corpse.
• Tragic Villain: She goes from being a complete Hate Sink to this trope if one believes that she only wanted power to stop her brother from freeing monsterkind and had no idea that the trait reversal spell would take away all the goodness in her heart and soul forever.
• Used to Be a Sweet Kid: Up until her brother defeated her, Agate was nothing short of nice and kind-hearted, aside from her Well-Intentioned Extremist beliefs.
• Walking Spoiler: As most of the series is caused by her actions, she is most definitely one.
• Well-Intentioned Extremist: She certainly started off as one, believing that it would be better for both species to remain separated, but after she lost her duel with Copper, she lost her mind with it.
• Woman Behind the Woman: Indirectly; while she is most likely nothing more than a spirit, Betty is acting on her orders. Best demonstrated in "Hate" where she literally rises up from behind Betty while the latter is holding Asgore's fire magic.
• Would Hurt a Child: She killed Amber (her own sister) before transforming her into Bete Noire.

Miasma

A mysterious being wearing a Plague Doctor outfit who has the power to spread poisonous corruption through their magic. They are responsible for killing off most of Kanashi's village.

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• Ambiguous Gender: Due to nobody seeing under their mask, it's unclear what their gender is.
• Ambiguously Human: Nobody's really sure who or what this thing is under its mask.
• Big Bad: For Kanashi's prequel story at the very least.
• Brainwashed and Crazy: One of their possible specialties.
• The Corrupter: They seem to have the power to cause anyone to attack and kill each other.
• Green and Mean: Is partially colored green and they wiped out much of Kanashi's village.
• Plague Doctor: This is the vibe their appearance gives off, although they cause plagues as opposed to attempting to stop them.
• Poisonous Person: Has the power to wipe out entire villages effortlessly.
• Villain of Another Story: Has only appeared in Kanashi's story thus far.

Stelle

A former Wizard of Integrity and Roy's former friend. She helps train Cody to use his magic, but is killed when she tries to murder the King.

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• Affably Evil: For how bad her actions are, she never seemed to show any malice toward anyone, making her actions all the more jarring for Cody and Roy.
• Curtains Match the Window: Stelle's eyes and hair are both blueish.
• Evil All Along: Attempted to kill the King and was apparently, if the townspeople are to be believed, planning on doing it from the very beginning.
• Friend to All Children: Is introduced training Integrity children to use their powers and quickly bonds with the young Cody.
• Posthumous Character: Has already been killed by the time Cody's story begins.