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Characters / Underverse

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The first iteration of Sans to have ever been created. He acts exactly like his game counterpart, being lazy and full of bad puns.
  • Ambiguous Situation: There are hints throughout the series that he and the timeline he came from are not all they appear to be. X-event Chara blatantly tells him that he knows there is something wrong with him and the main universe in 0.3 part 2.
  • Beware the Silly Ones: Just like his canon self.
  • Decoy Protagonist: Gets heavily overshadowed by Ink.
  • Properly Paranoid: He's suspicious of Ink the first time they meet. And rightfully so.
  • Pungeon Master: He loves making them.
  • Reluctant Hero: Originally, he didn't even want to join Ink on his adventure, but changed his mind once the half of his soul Cross left him started to cause problems.


"What did you do this time, you idiot!"
A version of Sans that is much more violent and prone to anger than the rest of his counterparts. He hates everyone and everything, but reluctantly goes with the heroes because he's on the run from his "boss".
  • Anti-Hero: Does not particularly like the rest of the cast, but joins them anyways because it's whats "right".
  • Berserk Button: Don't tell puns around him. He hates them.
  • Dark Is Not Evil: He may not be the nicest looking, but he's on the good guys' side.
  • Impaled with Extreme Prejudice: Together with Swap at the end of 0.4.
  • Jerkass: Very much so.
  • Jerk with a Heart of Gold: After the events of 0.3 Part 2, he is seen comforting Underswap!Sans (who has just lost his home and his brother) in 0.4, showing that while he may not be the nicest, he has a softer side to him.
  • Sir Swears-a-Lot: Almost every other word uttered by this version of Sans is a swear.


Another version of Sans that is the most cheerful and optimistic. He loves tacos and everything about his brother and the Royal Guard. He joins the main cast after his own pacifist timeline is erased, leaving him without a home to go back to.
  • Adorkable: This is Underswap Sans we're talking about.
  • Break the Cutie: Goes through a terrible one throughout 0.3 and 0.4, watching his brother losing faith completely, having his timeline and everyone in it erased, and having his supposed new friend betray him. To make things even worse, it finally ends with him being killed by XGaster.
  • Catchphrase: "Mweh heh heh!"
  • Go Out with a Smile: When XGaster impales him, he has a vision of all of his friends still being alive, causing him to invoke this trope.
  • He Knows About Timed Hits: Knows to some degree about the problems with Cross.
  • Impaled with Extreme Prejudice: Together with Fell at the end of 0.4.
  • Kill the Cutie: XGaster kills him and Fell in 0.4.
  • Sole Survivor: X-event Chara corrupts and ultimately destroys his entire universe, with only Swap being able to escape with the heroes. Ultimately subverted however, as he dies at the end of the very next episode.
  • The Cutie: He's an adorable little ray of sunshine. Until his universe gets destroyed.


"Anyone is always welcome. After all, I'm not the owner of this world."
A version of Sans who lives in outer space. Personality-wise, he's not all that different from Sans, sharing his love for jokes and his brother. He believes the sky is big enough for everyone and can't imagine having to deal with artificial stars.
  • Killed Offscreen: Although the audience doesn't get to see the body or his fight with Killer, he's never seen again after the camera cuts away, and due to Killer being present later on, it's heavily implied that this was his ultimate fate.
  • Nice Guy: He welcomed Sans with open arms and was more than willing to help him find Ink, even though they had just met.
  • We Hardly Knew Ye: He barely gets any time to talk with Sans before he is killed by Killer.
  • Wide-Eyed Idealist: He simply cannot imagine that someone could be greedy enough to consider themselves the owner of a whole universe.


The main protagonist (somewhat) of Underverse. He serves as the guardian of all the Alternate Universes that have ever been created. He is a very odd and imaginative individual.
  • Arch-Enemy: To Error, who wants to destroy all of the Alternate Universes he has worked to protect.
  • Brutal Honesty: Has a habit of just saying whatever he wants without thinking of how other people might be affected by it. This kind of foreshadows his true nature as The Sociopath, though a first-time viewer might just think that he's being Innocently Insensitive.
  • Chaotic Neutral: Xtra scene 2 reveals he was never really on either the good guys' or Cross' side. He views the whole situation as a fun game he and XGaster are playing.
  • Cloudcuckoolander: He can act very strange, focusing only on Error's new outfit when they were supposed to be having a serious discussion. He also tends to forget what he was talking about in the middle of a sentence. This is later revealed to be an act he puts on, as part of his "game".
  • The Dragon: 0.4 reveals he's in league with X!Gaster.
  • Face–Heel Turn: For most of the first season, he was by all accounts the protagonist, even more so than Classic!Sans. However, 0.4 reveals he was in league with X!Gaster the entire time.
  • Emotion Eater: The colored vials he has on his belt are actually filled with all different emotions. He needs to refill them in order to be able to feel since he doesn't have a soul. It starts to show in 0.3 Part 2 and others start to take notice of it. In 0.4, he's stopped taking them altogether, finishing his slow transformation into an Empty Shell.
  • Empty Eyes: After he starts to become emotionless, his eyes change from multi-colored to a dull white, with no visible emotion in them.
  • Empty Shell: He officially becomes this in 0.4 after he voluntarily stops taking his emotion vials.
  • Evil All Along: He's been working for XGaster the whole time.
  • Eviler Than Thou: Pulls this on Error in 0.4 and technically in Xtra Scene 2, though whether or not Error was just Dreaming of Things to Come or if Ink and XGaster were really speaking to him is somewhat left open.
  • He Who Must Not Be Seen: He has to make sure that he makes as little contact with the Alternate Universes and their characters as possible so as not to disturb the natural order of things.
  • Moral Event Horizon: In 0.4, he full-on turns on his own team, letting XGaster murder them in cold blood.
  • Motive Decay: As the guardian of all AUs, he originally just wanted to protect other people's creations. However, as more and more creators started to abandon their works, the Doodle Sphere slowly collapsed in on itself and he became terrified of eventually being forgotten along with it. After he met X!Gaster and the latter promised to him to help him feel even without having to rely on the creation of new worlds, he seemingly abandoned his duties altogether, due to a desire to finally experience something new.
  • Mr. Imagination: All of his attacks are based around Ink's creative mind.
  • The Sociopath: Arguably even more so than XGaster. While XGasters' eventual Lack of Empathy came about as a result of him going Drunk with Power due to the reality altering capabilities of the Overwrite button, Inks' comes from him having no soul and having to rely on artificial emotions to function.
  • Took a Level in Badass: After he stops taking his emotion vials in 0.4, he's able to effortlessly hammer Error into the ground.
  • Took a Level in Jerkass: And how! After he becomes an Empty Shell in 0.3, his demeanor changes from cheerful and kind to cold, distant, and ruthless. He denies that Sans, Swap, and Fell are his friends, frees XGaster even though he knows how dangerous the latter is, and even flat-out admits that he does not care for the multiverse and that the only thing he truly cares about is being able to feel when a new universe is created.
  • Pet the Dog: In hindsight, him coming back to X-Tale and befriending Cross was this. He had no reason to check up on Cross, since by that point he was already in possession of half of X!Gasters soul. In fact, considering X-Event Charas status as Cross's Enemy Within it was actually a huge risk on his part.
  • Unwitting Instigator of Doom: He was the one who originally showed X!Gaster the Multiverse, in an attempt to re-inspire him and keep him from destroying his world. It worked a little too well. XGaster, upon seeing all of the different pacifist timelines, became obsessed with creating the perfect world, which led to him starting the X-Event experiment. Somewhat zig-zagged, as he's revealed to have been working for XGaster the whole time, despite knowing what he did.
  • Using You All Along: He's been doing exactly this to the entire cast from the very beginning. He never truly cared about what happened to them or their homes. He merely needed them for his and XGaster's "game".
  • Vomit Indiscretion Shot: Whenever he gets especially worked up about something he starts to vomit black ink.
  • What Measure Is a Non-Unique?: He firmly believes that destroying or ruining a small fraction of the Multiverse doesn't matter since there are at least thousands of Alternate Timelines per Alternate Universe. As such, he sees the worlds of his "friends" as nothing more than expendable little blips on a much larger scale.


"I can sense three souls with very strange feelings..."
Protector of Dreams and Positive feelings, Dream is the embodiment of positive emotions, constantly having to keep his brother, Nightmare, in check.
  • The Archer: While he does use a bow as his primary weapon, Dream himself is a complete subversion of the usual archetype: he's a kind All-Loving Hero who tends to get overly emotional and clearly has a lot of respect for Ink.
  • Allergic to Evil: He can't use his powers in a negative environment. (I.E, no one can be happy in a certain situation.)
  • Crippling Overspecialization: His powers only work when at least one person close to him feels positive feelings/has happy memories and even then his skill-set seems to be limited to teleportation and his bow.
  • Energy Bow: The arrows he shoots are made of positive feelings.
  • The Empath: Like his brother, Dream can sense emotions. He works to preserve/engender positive ones.
  • Good Is Not Soft: He is able to take down Nightmare in seconds with just a few shots from his bow when previously the combined powers of Classic Sans, Underfell Sans, Underswap Sans and Underswap Papyrus weren't able to put a scratch on him.
  • Light Is Good: Played straight.
  • Sacred Bow and Arrows: His bow is the only weapon that can actually hurt Nightmare - because the arrows he shoots from it are made out of positive feelings, Nightmares' Kryptonite Factor.



X-Event Sans/"Cross"
"I need some resources to rebuild my world..."
Click here to see him after XGaster revives him. 

The main antagonist of Underverse. An alternate version of Sans that is the only survivor of his world after a Genocide run without reset capabilities... or so he thinks.

  • Appropriated Appellation: X-event Frisk began to call him "Cross" in the tenth X-Tale timeline, because of his uniform's design. Cross later uses it to introduce himself to Ink, even though he actually can't stand the name because it's a constant reminder of X-event Frisk's betrayal.
  • Big Bad Wannabe: He tries really hard to make himself out as a threat, but the poor guy has to either rely on others for his plan or get the Eviler Than Thou treatment from his supposed "allies" who constantly trick and use him.
  • Cain and Abel: He was forced to kill X-Papyrus in the prequel comics, because the latter was so firmly on X-event Frisk's side he tried to kill Cross several times.
  • Cosmic Plaything: It seems in some way everyone in the multiverse has it out for him: X-event Chara and Frisk wanted to make him into their tool and failing that, tried to use his friends to dispose of him, his "father" XGaster used him for entertainment, Nightmare frequently abused him during their brief team-up, the group of Sanses around Ink chased him across half the mutliverse and were fully willing to let him die once Classic!Sans took back his stolen soul from him and even Ink himself, whom Cross had previously thought was his Only Friend, turned out to have been Evil All Along and only have befriended him to further XGaster's "game".
  • Embarrassing Nickname: He actually hates being called Cross and would rather people just call him Sans. "Cross" was the nickname X-event Frisk gave him in the very timeline he tried to kill him in.
  • Genocide from the Inside: In the prequel comic it's revealed that Cross himself was the one who murdered nearly everybody in his world during a misguided attempt to become the new X-event and claim the OVERWRITE-button for himself. It ultimately failed, due to Cross' being a monster and thus unable to actually use the button.
  • Neutral Evil: To Chara's Chaotic Evil.
  • Red Oni, Blue Oni: The Red Oni to Chara's Blue Oni. Though the roles shift around a few times.
  • Heel–Face Turn: The end credits scenes of 0.4 imply he will go through one.
  • Hybrid Power: Has most of his "Sans" attacks while also being able to use knives thanks to the human half of his soul. That is, until Cross is finally separated from him in 0.4.
  • Tears of Blood: Trying to fuse with the X-event's soul corrupted him so badly that he cries blood in his current state.
  • Tragic Villain: He genuinely doesn't want to harm anyone, he just wants to rebuild his home.
    • The prequel comic expands on this. Cross was simply a royal guard in charge of protecting X-Event!Frisk alongside his brother. He had no idea about the secret war for the Universe or that his own code was being manipulated. He then attempts to become the X-Event himself by absorbing X-Event!Frisk's soul after seeing his true nature. In doing so, he not only ensured the destruction of his home, but also lost any chance of being able to OVERWRITE due to his status as a monster locking him out of using the OVERWRITE button. No wonder he wants to rebuild his world so badly.
  • Sanity Slippage: In the prequel comic. Granted, he was slowly dying at the time and everyone, including his own brother, had just tried to kill him. It really shines through during the final fight against all of them.
  • Scars Are Forever: His trademark red scar. Not even a RESET can take it away. Subverted in 0.4 when XGaster revives him. He no longer has the scar as a result.
  • Well-Intentioned Extremist: He will do anything to rebuild his home.
    • He attempted to steal X-Event!Frisk's SOUL because, as XGaster had pointed out, there was nothing stopping them from becoming just like him eventually, and their manipulations up to that point certainly did not make them look good.
  • Woobie, Destroyer of Worlds: He's lost everything thanks to XGaster and X-Event!Frisk's on-going fight for their universe. All he wants is his friends and world back.


Click here to see his older appearance. 
An alternate version of Chara that was absorbed and kept prisoner inside of Cross' body until Error unintentionally freed him. Now, he appears to Cross as a metaphysical spirit, influencing some of his actions. Originally, he was the eldest son of XGaster and the prime subject of his X-Event experiment because in his words, he was the stronger one. As his father's perfectionist attitude got to be too much, he teamed up with his brother in order to try and overthrow him so that they could become the owners of X-Tale. Unfortunately, they failed and their world was destroyed.
  • All for Nothing: X!Gaster's restoration in 0.4 renders everything he'd worked for in the season meaningless. When it sinks in, he's not too happy about it.
  • Antagonistic Offspring: Thanks to a combination of his father's perfectionist attitude and the X-Event experiment, he's very upset with him and actively revolts against him with his brother in the prequel comic.
  • Badass in Distress: 0.4 sees him completely at the mercy of Nightmare and Killer. At one point, he's seen trying desperately to keep them from force-feeding him a monster-soul.
    • He's taken captive by XGaster at the end of the episode.
  • Big Bad Duumvirate: With Cross, playing The Man Behind the Man. He forms another one with Nightmare after Cross is defeated, but it backfires on him when Nightmare is able to play their deal to his favor.
  • Big Bad Ensemble: With Cross, Nightmare, Error, and later X!Gaster. He has a Big Bad Duumvirate with the former two, and is in direct conflict the latter two.
  • Big Bad Wannabe: A very significant threat, no denying, but he's reduced to this in 0.4, being manhandled by Nightmare and forced to go along with his wishes, and later upstaged by X!Gaster when Ink frees him.
  • Calling the Old Man Out: Him and X-event Frisk attempted to do just that with XGaster, but were swiftly ignored and brushed off as "ungrateful brats".
  • Chaotic Evil: Definitely on the psychopathic side of things. Losing your SOUL will do that, especially if you're already a Well-Intentioned Extremist.
  • The Corrupter:
    • To his little brother X-Frisk, after losing his soul and being fused itno the X-event. While Frisk was still hesitant to actually hurt people, Chara steadily preyed on his insecurities and desire to be free from XGaster and it's X-Chara who suggests using Cross in their Thanatos Gambit in a particularly weak moment.
    • He takes the same role after Cross seals him inside his body. While Cross was willing to go to extremes, he still had scruples and regretted having to fight Ink and hurt innocent people to get his world back. X-event Chara steadily egged him on and his attempt to take over Cross' body was arguably what drove Cross off the deep end.
  • Enemy Within: Is this to Cross up until 0.3.
  • Freudian Excuse: He claims that he's only going so far because XGaster treated him and X-Event!Frisk so poorly in the past. Considering their father's attitude and actions, it really isn't a surprise he and his brother are mentally unwell.
  • Hidden Depths: Although they butt heads pretty often, deep down he still cares about Cross. During his fight with Swap in 0.3 part 2, he briefly sees a vision of Cross tearfully telling him that this is not what their friends from X-Tale would have wanted. Right after that he uses his powers to heal Swap completely, admits to him that he actually misses being friends and even offers Swap to join him. When Swap shows no intention of backing down, he remarks that it was silly of him to think Swap would understand him, since at the end he's not really his Sans.
  • Hypocrite: He seeks to punish XGaster and Ink for treating innocent people like they're their personal play-things and destroying lives for no reason other than that they can - by doing the exact same thing to every pacifist timeline he comes across.
  • It's All About Me: He doesn't care that he's hurting innocent people. Every time he's cornered, he immediately starts squalling about how he is in the right, because of what XGaster did to him and his brother. When XGaster is eventually revived, all he does is scream about how he was supposed to win and how unfair this situation is to him.
  • Really 700 Years Old: The flashback in 0.4 reveals that X-Event!Chara has grown up multiple times already, but is now stuck in his child form, due to his father's constant abuse of the OVERWRITE button.
  • Red Oni, Blue Oni: The Blue Oni to Cross's Red Oni.
  • Revenge: His main motivation for wanting to destroy the Alternate Universes. He wants revenge on XGaster for everything he did to him and his brother Frisk and on Ink for indirectly causing it all to happen in the first place. Destroying all of the timelines they admired so much seems like a good start to him.
  • Kick the Dog: When they were still fused together he tended to verbally abuse Cross whenever he could, calling him nothing but a tool, mocking him for destroying the world he'd been trying to save and even attempting to take over his body without permission when he was already tired out and injured from his fight with Fell.
  • Laser-Guided Karma: Throughout the first few episodes he's done everything in his power to put Cross down and even called him nothing more than a tool in 0.2. By 0.4 the tables have effectively turned on him. Now he is the one constantly being abused and put down by a Reality Warper who can read his thoughts.
  • Moral Myopia: Hates XGaster and Ink because they manipulate and use people for their own gain. He and X-Event!Frisk did the very same thing to Cross in the prequel comic and didn't even seem to feel sorry about it afterwards. Chara in particular started mocking him for destroying the world he'd been trying to save, though Frisk at least desperately tried to make amends to some degree before dying.
  • Not So Different: He hates how XGaster and Ink lie to and manipulate people to get what they want, but the prequel comic shows he and X-Event!Frisk weren't exactly saints in that regard either.
  • Psychopathic Manchild: He's Really 700 Years Old yet still feels the need to throw massive temper tantrums whenever something doesn't go his way, shows child-like glee at torturing innocent people and acts like his situation entitles him to the Overwrite-button and the multiverse.
  • Sanity Slippage: Happened gradually in his backstory. Being forced to kill his own brother and becoming a pawn in XGaster's "game" was probably what drove him off the deep end.
  • The Extremist Was Right: In 0.3 Part 2, he makes the assumption that Ink is secretly helping XGaster come back and is merely using the other Sanses to achieve that goal. 0.4 shows he was completely right.
  • Too Dumb to Live: Insulting and attempting to order around an Eldritch Abomination, who is clearly already pissed at you, while you yourself are injured, pretty much powerless and stuck in a child's body may not be what one would call a smart move.
  • Used to Be a Sweet Kid: If the flashback in 0.3 Part 2 and what Nightmare says in 0.4 is anything to go by.
  • Villainous Breakdown: Breaks down into tears when XGaster is restored at the end of 0.4, effectively nullifying his plans.
  • Woobie, Destroyer of Worlds: His own father experimented on him and his brother over and over again, so he could create the perfect world. Trying to stop him is what ended up driving him insane, according to Nightmare.

    X-Frisk (SPOILERS

Click here to see his older appearance. 
An alternate version of Frisk who X-Tale!Papyryus and Cross are assigned to protect. Nice and caring, he just wants everyone to have a happy ending. Originally, he was the younger son of XGaster who actively fought against him using the very power his father had "gifted" him with. Growing tired of his father's "game", he attempts to pull a Batman Gambit which ultimately fails.
  • Antagonistic Offspring: Thanks to a combination of his father's perfectionist attitude and the X-Event experiment, he's very upset with him and actively revolts against him with his brother in the prequel comic.
  • Back from the Dead: VI.VII shows him alive and well by XGaster's side.
  • Big Bad: Of the prequel comic.
  • Brainwashed and Crazy: Briefly becomes this in X-tale IV as a result of XGaster overwriting his code.
  • Bitch in Sheep's Clothing: He is presented as a nice and caring person like most portrayals of Frisk, but after Cross refuses to kill him as a part of his plan, he drops the act and actively tries to eliminate him from then on.
  • Break the Cutie: Originally, he was as nice as any other Frisk, but the X-Event experiment gradually took away any niceness he had until it made him into what he was by the time of the prequel comic.
  • Creepy Child: What he is really like under his facade.
  • Death Seeker: By the time of X-Tale X he's become so fed up with repeatedly losing to and being used by XGaster, he tries pretty much everything to make the pain stop. Unfortunately for him, XGaster has other plans and forcefully keeps him and X-event Chara alive.
  • Evil Former Friend: Him and Cross were best friends before he decided to manipulate his code. It didn't stop him and his brother from trying to kill Cross when he refused to play along with their Thanatos Gambit.
  • He Knows Too Much: When Cross refuses to kill him, he tries to pull this but is stopped at the last second by XGaster.
  • I Just Want to Be Free: More than anything else, he wanted freedom from XGaster and his role as the X-event experiment. He got it in the end, though not in the way he expected.
  • Impaled with Extreme Prejudice: A victim of this twice over. The first time, it's from Cross' entire arm which mortally wounds him. The second is from one of his giant knives which finishes the job.
  • Karmic Death: In the end, he is murdered permanently by the very person he tried to manipulate into killing him before.
  • Killed Off for Real: At the end of the prequel comic thanks to Cross until after the events of 0.4.
  • Manipulative Bastard: In X-Tale X he uses his overwrite powers to repeatedly manipulate humans around him into attacking and trying to kill him. Of course no one else but XGaster and X-Alphys notices, so the humans he brainwashes are essentially made into his scapegoats. This behavior extends even to Cross, his supposed "best friend".
  • Moral Event Horizon: Manipulating Cross' code in order to force him to kill him. When that doesn't work, he simply decides to kill him to prevent him from being an obstacle to his plans.
  • Patricide: Him and X-event Chara nearly killed XGaster in the prequel comic.
  • Tragic Mistake: Insisting on killing Cross himself out of anger even though he was already dying. This comes back to bite him hard, as it gives Cross an opening to impale him and absorb his soul.
  • Tragic Villain: Just like his brother, the X-Event experiment caused him to become bitter and angry, willing to do whatever it takes to win the war for the universe.
  • The Un-Favourite: Was this to XGaster in the X-Tale timelines, due to his determination being a lot weaker than X-Chara's.
  • Not-So-Well-Intentioned Extremist: In the prequel comics He tries to get Cross to kill him in order to gain full control of the Overwrite button and overthrow XGaster. However he later reveals that this is not due to a desire to free everyone, but because he can't stand not being the one in control, like his main universe counterpart. Something Cross immediately realized and called him out on.


"It's enough. I'm tired of this."
A corrupted version of Sans that formed after a glitched reset of a broken timeline. He believes all Alternate Universes and their characters to be "Anomalies" and thus believes they should be destroyed. One of his main goals is to find the "Omega Timeline" and destroy it because of the amount of anomalies there that have evaded him.
  • Arch-Enemy: To Ink, who wants to protect the "anomalies" he hates so much.
  • Big Bad Ensemble: He's another major antagonist in the series, but has no connection to X!Gaster or X!Chara's plans, nor does he have any desire to work with them.
  • The Corrupter: Hates most Alternate Universes, considering them to be "Anomalies", so therefore he corrupts and destroys them.
  • Curb-Stomp Battle: Gives one to Swap, Fell, and Sans in 0.4, capturing all three of them effortlessly.
    • Is on the receiving end of one right after that. An emotionless Ink is able to restrain and send him away in a matter of seconds.
  • Even Evil Has Standards: Even he is disgusted by Ink's true nature.
    Error: You freaking psycho. I shouldn't have negotiated anything with you.
  • Eye Scream: Those blue string he uses to grab things (and occasionally people)? He pulls them out of his eyesockets.
  • Hates Being Touched: Very much so. It either causes him to have a Freak Out or to crash himself.
  • Hybrid Power: He has normal Sans' attacks, but he executes his through blue puppet strings.
  • Hypocrite: He makes a big deal about hating anomalies despite the fact that he is one.
  • Marionette Master: His general theme. If he wraps another person's soul up in his blue strings, he is able to control their body and magic.
  • Not-So-Harmless Villain: For the majority of season 1 he was somewhat of a joke character, with no one really taking him seriously and Ink even outright ignoring his attempt to intimidate him in X-tra scene 1. 0.4 makes it clear that that was a mistake. Not only does he effortlessly capture Fell, Swap and Classic Sans, he almost manages to destroy the vial holding XGaster's soul. Oh, and he also destroys a huge part of the multiverse in the climax just to make a point.
  • Neutral Evil: A Type 3 example. He makes it more than clear that he wants nothing to do with XGaster's "game" and he's not particularly interested in joining Nightmare either. His beef is solely with Ink and the Alternate Universes. And while he does seem to know that, to the people who's universes he destroys, he's the bad guy, he himself sees what he does as a necessary clean-up job that no one else is able or willing to do.
  • Psychopathic Manchild: The majority of his actions are motivated by his petty grudge against Ink and AUs in general. He flies into a rage whenever he doesn't get what he wants right away, throws childish insults around like there's no tomorrow and possesses no emotional maturity whatsoever.
  • Pyrrhic Victory: He destroys the Doodle Sphere, technically coming out ahead of Ink in their truce... but since XGaster was revived anyway, he doesn't get to enjoy it.
  • Villain Has a Point: In "The Truce", he bashes Ink for endlessly helping to create more Alternate Universes, telling him that the Multiverse has a limit and could collapse if Ink keeps making more. He's right.


"Wherever you go, I want you to hurt somebody, but not physically. You know what I'm talking about."
A nightmarish-looking Sans who is attracted to the negative feelings of others, feeding off of them. He makes a deal with Cross in order to spread these negative feelings across the other Alternate Universes.
  • Berserk Button: Trying to break a deal with him.
  • Big Bad Duumvirate: He enters one with X!Chara, though it becomes a painfully one-sided partnership in Nightmare's favor by 0.4.
  • Eldritch Abomination: It's not exactly clear what he's supposed to be. His body seems to constantly melt away and he's shown to produce tentacles from his back multiple times.
  • Eviler Than Thou: Constantly reminds Cross that he is far more powerful than he is. X-Event!Chara gets this treatment as well in 0.4.
  • Good Hurts Evil: Played straight.
  • Kryptonite Factor: Happiness, and of course, his own brother, Dream.
  • Motive Decay: His origin story gives shades of this.
  • The Empath: Like his brother, Nightmare can sense emotions. His interest lies in the negative ones.
  • The Man Behind the Man: To both X-Chara and Cross. His partnership with X-Chara drives most of the plot.
  • Tragic Villain: In his origin story, he originally wanted people to love him, but got so desperate in his attempts to be a good guy that he corrupted himself. Now he wants everyone to feel his pain and thus fully supports genocide runs in any Undertale AU.


"Congratulations, Alternate Universe trash. You have learned something interesting today."
A version of Sans that is summoned by Nightmare when X-Event!Chara proves to be unreliable. Because he comes from an Alternate Timeline rather than an Alternate Universe, he has access to the original Sans' memories and thus knows about the X-Event and the damage they've caused, making him fairly dangerous.
  • Brainwashed and Crazy: Essentially what the Chara of his timeline did to him.
  • Chaotic Evil: All he seems to care about is killing and hurting others.
  • The Dragon: To Nightmare from 0.4 onward.
  • Eviler Than Thou: He shows up X-Event!Chara very quickly, and is a closer accomplice to Nightmare than they are.
  • Eye Scream: His eyes constantly drip with a black liquid that is said to be pure hatred.
  • Knife Nut: His weapon of choice is a knife that bears an uncanny resemblance to the Real Knife.
  • Non-Standard Character Design: His soul is unlike anything else seen so far. It's a red monster soul that is shaped like a target, and unlike other souls, is always seen on the outside of his body.
  • Slasher Smile: His default expression is a menacing grin.
  • Tragic Villain: Per his backstory, he was essentially forced by the Chara of his Universe to kill everyone. After he had done the deed, he was left unable to feel any emotion and was left a warped, broken shell of his former self.


Click here to see him with half his soul 
Click here to see him without his soul. 
Click here to see his original form. 
A very mysterious figure who is watching the cast of Underverse very closely.

Once the benevolent creator of X-Tale, XGaster longed to create the perfect world, but fell into despair when he was unable to do so. After meeting Ink and seeing the Doodle Sphere, he became inspired to try something new, the X-Event.

  • Abusive Parents: At first, he was a genuinely loving father... then, after becoming obsessed with perfection, he experimented on his own kids to achieve his goals.
    • In X-Tale X he is this to both X-Papyrus and Cross, being incredibly aloof, emotionally abusive and blaming them for things that aren't their fault.
  • Arch Nemesis Dad: Towards X-Chara and X-Frisk. His constant OVERWRITING takes a massive toll on their mental states, to the point they both outright loathe him, and work to undermine him however they can.
  • Bait the Dog: Practically a running gag with him. There are several times where it seems he might have a heart only for him to turn around and prove that, no, he definitely hasn't. A key example being after he fused his kids into the X-event: he seems a lot nicer and affable at first... but then orders them to kill their creation because he finds it hideous, and revealing he was only being nice because he THOUGHT he had them under control.
  • Berserk Button: He does not allow "garbage" timelines in his universe, and thus despises the power of RESET when X!Chara uses it against him to undo his damage. Bonus points for RESET also being an actual button.
  • Betrayal by Offspring: Considering what he'd already done to them by that point, it was more than Justified.
  • Big Bad: Of the X!Tale flashbacks, and later the main series. His power with OVERWRITE drives the main conflict, though he remains out of focus for a a good chunk of the first season. Upon being freed in 0.4, he effortlessly outclasses the Big Bad Ensemble, and solidifies his place as the main villain.
  • Big Bad Slippage: He wasn't evil at first, just trying to make a perfect world for his children to live in. However, the power of OVERWRITE, alongside his perfectionist standards turns his attention to creating the best story in the Multiverse, regardless of the atrocities he has to commit along the way.
  • Body Horror: Most of his body became deformed and melted due to the shred of Determination in his "soul" being all that kept him alive after the attempt on his life. He also has no legs courtesy of X-Event!Frisk cutting them off. Not that he needed them anyway.
    • His "restored" appearance in 0.4 meets both his former appearances in the middle, looking much better than before but still a far cry from what he used to look like.
  • Can't Kill You, Still Need You: He admits he would have permanently killed his sons ages ago, but he needs their determination, and unlike the rest of the X-Tale cast he can't simply recreate them.
  • Can't Take Criticism: X!Gaster doesn't take kindly to his own sons calling him out on altering everyone's lives for the sake of his "perfect" standards, and handles it with as much class as a narcissist would.
  • The Chessmaster: XGaster is a master schemer who excels at long term plans, with Underverse basically being him playing everyone through Ink.
  • The Corrupter: To Ink.
  • Crazy-Prepared: Knowing that one day his sons would eventually rebel against him and try to take the other half of his soul, he entrusted it to Ink far before then in order to keep it from them.
  • Creator Backlash: An in-universe example. He OVERWRITES X-Tale at least ten times, and eventually becomes dissatisfied with each timeline, be it through inadequacy or his creations outright rebelling against him. He's very much an extreme depiction of a creator plagued with self-doubt and insecurities over their creations and constantly redoing it in an effort to achieve perfection... only in X!Gaster's case, his creations are living, breathing, feeling individuals, and they don't like being used as playthings.
  • Crippling Overspecialization: XGaster's ability to OVERWRITE makes him the most powerful character in the setting, but he is nowhere near as capable without it. He often performs poorly in fights, until he falls back on manipulating reality or summoning one of his many brainwashed minions to fight for him.
  • Determinator: Say what you will about the guy, but when he wants something he works his damndest to get it. It's shown his pursuit of his "Destiny" and having to plot toward it is extremely tiresome, but he continues towards it.
  • Dirty Coward: In all of the fights he's been in so far, he has either cheated his way out via OVERWRITE, attacked when the opponent wasn't ready for it or simply let one of his brainwashed creations fight for him. In his entries in the prequel comic he expresses fear that his creations will one day get fed up with his constant mistreatment of them and rebel.
  • Driven to Suicide: In his backstory, he planned to do this after he failed to create something wonderful which would have destroyed X-Tale along with him. Ink is able to put a stop to this by showing him the Multiverse, reinvigorating his passion.
  • Drunk with Power: The main cause of his descent into villainy. With the reality-warping capabilities of OVERWRITE, XGaster developed a god complex that drove him to create the "perfect" universe, regardless of the effect it would have on his sons or his creations.
  • Entitled Bastard: He considers himself the true owner of the multiverse, simply because he is a creator. Everyone else with the exception of Ink is either a nuisance or a tool to him
  • Eldritch Abomination: Became this after his own sons tried to kill him.
  • Even Evil Has Standards: He's disappointed when he finds out X-Frisk took a page from his book and used the power of OVERWRITE to brainwash a group of humans into attacking him.
  • Evil Is Petty: On top of being insanely evil, XGaster is shown to be immensely petty. As revenge against his kids for rebelling against him, he rewrites reality to make it so that all of their friends hate them, and tried forcing them to kill their own creation because he thought it looked "hideous".
  • Eviler Than Thou: In 0.3 part 2, he provides some aid against X-Event!Chara, canceling out their use of OVERWRITE with his own half. It remains to be seen whether he genuinely wishes to protect the multiverse, simply didn't want the show to stop, was acting out of self-preservation, or some combination of the above.
  • Four Eyes, Zero Soul: Was this in his original form.
  • A God Am I: Not outright stated but he develops a very clear god complex as he continues to meddle with the timeline and his creations.
  • Greater-Scope Villain: For much of season 1, he's mostly absent from the plot due to not possessing his SOUL. However, his tampering with reality is what causes the conflict, as well as X!Chara's actions. After reclaiming his soul, X!Gaster steps into the Big Bad role at the end of 0.4.
  • Hate Sink: Regardless of who he used to be, he is by far the most vile character in the entire show. He killed his sons' friends several times and described their anguish as "Exciting", brainwashed Frisk into doing a Genocide route, mentally scarring him in the process, and later has him try to kill Chara, mocking the latter while doing so and calling them "Ungrateful Brats" when they fight back. He is a sociopathic narcissist and responsible for nearly everything bad that has happened in the main story.
  • Hypocrite: In X-Tale X he mentally chastises X-event Frisk for manipulating humans into attacking him, endangering the peace between humans and monsters in the process. He himself has gone out of his way to make the second timeline as tragic as possible by intentionally causing a world-spanning war and didn't hesitate to OVERWRITE people to do so.
  • I Did What I Had to Do: His general excuse for the horrible things he did in the X-Tale timelines.
  • Ignored Epiphany: In X-Tale IX, he briefly seems to show a softer side to X-Papyrus, and mentions how not being in control has given him a new perspective on the world... before saying how he "hated it" and has gone too far to turn back. Sure enough, by Underverse he's exactly the same as he was before this.
  • Inferiority Superiority Complex: The ability to OVERWRITE timelines as he sees fit has left him with a an insatiable god complex. He plays with the lives of his "creations" as he sees fit, and yet can't live up to his own perfectionist standards, constantly OVERWRITING the timeline to make a better one, uncaring for the effect this has on his sons' psyches.
  • It's All About Me: His viewpoint shifts from doing what's best to his sons, to what's best for him and what he believes will make the best story. He even starts referring to X-Tale as "his" universe, and that he won't let garbage taint it like the others.
  • Karma Houdini: Zig-zagged. On one hand, during the X-tale timelines he committed numerous crimes like murder, kidnapping and gratuitous child abuse, but any and all retaliation from his creations or his sons were quickly made null and void by his ability to overwrite reality. On the other hand, he kind of gets his comeuppance in the prequel comic, in which X-event Chara and X-event Frisk incite a rebellion against him and he is unable to fight back, due to half of his soul now belonging to X-event Frisk, and has his legs cut off. But then Cross interferes and gets him out of it in a misguided effort to get back at the X-event brothers for messing with his mind. And ultimately, he's left an empty, soulless shell of his former self, forced to hide in a void until someone finds a way to get him at least part of his soul back. Which is exactly what ends up happening in 0.4. Ink releases the half of his soul XGaster gave him to hold onto, which allows XGaster to come back in full force and take back the rest of his soul and powers with ease. Apart from his legs being gone, there have yet to be any lasting consequences for XGaster personally.
  • Lack of Empathy: He seems utterly indifferent to the suffering he's caused, both directly and indirectly.
  • Man Behind the Man: Has been using Ink of all people to manipulate the cast, and get his full soul back.
  • Motive Decay: As the "Creator" of X-Tale, he originally wanted the best for his two sons, X-Event!Chara and X-Event!Frisk. However, he became discouraged when he couldn't create the perfect world. After Ink shows him the Multiverse, he seems to be inspired again, but becomes so caught up in the X-Event experiment that his goal changes to wanting to see what interesting experiences his "game" will bring, no matter the cost.
  • Narcissist: He displays all the traits in the X!Tale flashbacks alone, and that's before the main story even takes place. He callously toys with his "creations" without regard for their lives, is unable to take the slightest amount of criticism, pins the blame of his failures on everyone else for being "ungrateful", and has a particularly nasty God complex that eventually extends to the entire Multiverse.
  • Never My Fault: Even before his sons rebelled against him, he utterly refused to take any responsibility for his less than moral actions, instead convincing himself that his sons were the ones in the wrong for attempting to call him out on it.
  • Non-Action Big Bad: Despite possessing the reality-altering power of OVERWRITE, X!Gaster doesn't fare well in a straight fight. Chara and Undyne were able to overpower him until he used OVERWRITE to gain the upper hand. He often uses minions and directly attacks when his enemies are already weakened, highlighting him as a smug coward who's too dependent on his power.
  • Not So Stoic: He usually keeps an air of professionalism in his entries as he continually alters X!Tale. However, this breaks as soon as people start acting against his wishes. Examples include when X!Frisk and X!Chara call him out on his actions and though he keeps a relatively straight face, his entry angrily denounces the two as brats, and the second is when X!Chara actually hits him, and he starts to take vindictive measures against his own children.
  • Overarching Villain: He's the true main villain of Underverse. As well as one half of a Big Bad Ensemble with his sons in the comic, and The early X tale animated shorts chronicle his descent into villainy, serving as the main Villain of the rest.
  • Paper Tiger: After he gave half his soul to Ink, he lost his ability to Overwrite, but nonetheless was able to convince his sons that he still had it and relied on that belief to intimidate them and stall their future rebellion. When they find out he doesn't they instantly rebel.
  • Parental Favoritism: In the X-Tale timelines, he came to see XChara as the stronger and overall superior son, to the point he was willing to erase XFrisk for being the weaker one and therefor, in his eyes, useless.
  • Purple Is Powerful: His soul is this color, and if 0.4 is any indication, he is no push-over.
    • Subverted. The timeline flashbacks show that without the OVERWRITE button and its reality altering capabilities, he's nothing more than a Dirty Coward who hides behind brainwashed minions and doesn't stand a chance in a one-on-one confrontation.
  • Protagonist Journey to Villain: The first few episodes of X-Tale are dedicated to show how he started off a well intentioned figure before descending into evil and losing his redeeming qualities.
  • The Perfectionist: The main reason why he kept constantly OVERWRITING X-Tale. He wanted to create the perfect timeline, but was never truly satisfied with what came out of it, and so he kept on changing everything until he came up with the X-Event.
  • Psychopathic Manchild: No matter what way he slices it, behind that sophistication, X!Gaster is a petulant child at heart. He treats the Multiverse as his own toy box, tampers with the lives of others, and can't even entertain the idea of being wrong.
  • Reality Warper: With the power of OVERWRITE, he can manipulate reality as he sees fit.
  • Seer: Its shown in the X-tale prequel episodes, that XGaster can see visions of the Future. He dreams about his upcoming "Death". As well as gets glimpses of his his ultimate victory in 0.4, at which point he becomes obsessed with ensuring this event happens, referring to it as his "perfect future" and his "destiny"
  • Spikes of Villainy: Has a couple of spikes protruding from his shoulders.
  • Start of Darkness: Ink showing him the Multiverse was arguably the turning point. Even though he was relatively happy in the first timeline, he eventually started getting plagued with doubts, which grew into dissatisfaction with his own creation, leading to his more drastic measures to create the "perfect" story.
  • Toxic Friend Influence: What his Villainous Friendship with Ink is, as it has Gaster slowly but steadily make Ink just as amoral as he is.
  • Truly Single Parent: To X-Chara and X-Frisk, kind of. In the X-Tale flashbacks he explicitly refers to them as his sons and they seem to consider him a father too. A mother is never shown or mentioned. Then again, X-Frisk states in X-Tale II that he and X-Chara weren't created by XGaster and it's never really elaborated on more than that.
  • Villainous Friendship: Most of the X!Tale origins videos portray him as having an amicable relationship with Ink. He appears to be the only person X!Gaster doesn't regard as a plaything.
  • Walking Spoiler: Very much so for his role in the prequel comic and his status as The Man Behind the Man. His revival in 0.4 only makes him that much more of a spoiler.
  • Yank the Dog's Chain: In X-Tale VIII his attitude towards his sons seems to have improved marginally. He teaches X-event Frisk how to use the OVERWRITE-button and even allows him to make a creation of his own. Then, as soon as he suspects said creation (Mettaton) could be a danger to him personally, he coldly orders X-event Frisk to destroy it, telling him that he finds it "hideous" and that he alone decides which creations are worthy to keep.

Supporting Cast


A version of Sans who is based off of the 80s/90s and Error's brother. His job is to watch over X-Tale per Ink's instructions and make sure nobody else enters.
  • Beware the Silly Ones: He is far wackier than the original Sans, but he can be just as scary if not more so. Just ask Cross.
  • Eldritch Abomination: He looks normal right now, but this is what he looks like with a host. His true form is much more terrifying.note 
  • Empty Shell: His base personality, lacking in emotions and being incapable of love. He hides it well under his "go with the flow" personality.
  • Gag Censor: One of his abilities, which kicks in whenever someone tries to swear. It causes the word to become a Sound-Effect Bleep while also changing the word to one of his "Fresh words". Underfell!Sans learns this the hard way.
  • The Thing That Would Not Leave: Not even Error can erase him.
  • The Virus: To survive, he must continually jump from host to host so that nobody becomes suspicious of him.


"It's their fault."
A version of Frisk, who after resetting the timeline over and over again, was thrown into the CORE by their Sans. However, rather than being scattered across time and space, their determination allowed them to become an omnipresent being who could travel to any timeline in any universe. Their job is to go to timelines that are deserted or collapsing and take the survivors to the "Omega Timeline", a safe haven where all timeline survivors can live together in peace.
  • Neutral Good: They have no interest in taking an active part in the battle, but they will do what they can to make sure the survivors of the erased universes stay safe in the omega timeline.
  • Not So Stoic: They don't show a lot of emotion when they first encounter Sans in Xtra Scene 1, but in 0.4, seeing the death of Underswap!Papyrus and being unable to help him drives them to tears.
  • The Omnipresent: One of their powers thanks to their fall into the CORE. They use this in order to spy on X-Tale!Alphys while being in X-Tale with Dream.

X-Tale Cast

     In General 
  • A Day in the Limelight: They each get an animated short centered around them and their timeline, giving the viewer a glance at who they were before becoming XGaster's pawns.
  • Ambiguous Situation: After being brought Back from the Dead at the end of 0.4, they all seem to be on XGaster's side but it's not clear whether this is due to him brainwashing them through OVERWRITE or due to them agreeing with his goals.
  • Brainwashed: All of them fall victim to this several times before the main plot even starts. And it's heavily implied that their current state is this in 0.4.
  • Expy: A large cast of powerful, vastly different antagonists with their own tragic backstories, led by a Visionary Villain that wants to shape reality to their liking draws comparisons to the Akatsuki.
  • Morality Pet: To Cross and X-Chara, to some extent. Almost all of them had a positive influence on X-Chara in the timeline they gained the heart locket in and at the start of the series they were Cross' motivation for becoming a Well-Intentioned Extremist.
  • Posthumous Character: Zigzagged. All of them, except for X-Alphys, were killed long before Underverse, but their base data was preserved in XGaster's timeline entries. He also brings them all back via OVERWRITE at the end of 0.4.

The adoptive brother of X-Chara and X-Frisk. Was the receiver of the heart locket in X-Tale's first timeline.
  • Big Brother Worship: Downplayed. He was created to be X-Frisk's and X-Chara's family and looked up to them a great deal. Before XGaster erased and overwrote him, he expressed his utter faith that the two of them would be able to free him and the rest of the X-Tale cast one day.
  • Voluntary Shapeshifting: Despite never becoming a flower in his universe, he can still turn into Omega Flowey, thanks to XGaster's OVERWRITE.

The guardian of X-Frisk and X-Chara. Was the receiver of the heart locket in X-Tale's second timeline.
  • Being Good Sucks: He did his best to console X-Chara in the second X-Tale timeline, becoming their favorite as a result. Upon noticing this, XGaster proceeded to murder him, in order to make his story more interesting.
  • The Good King: Was created to be this for the monsters. He seems to have lost this quality after the tenth timeline.
  • Parental Substitute: To X-Chara in the second timeline.

The adoptive mother of X-Frisk and X-Chara. Was the receiver of the heart locket in X-Tale's third timeline.
  • Eyes Always Closed: She refuses to open her eyes after receiving the memories of the past X-Tale timelines, due to not wanting to see what her once happy family has become.
  • Parental Substitute: To X-Chara and X-Frisk in the first and third timeline.
  • Too Good for This Sinful Earth: Her timeline was so incredibly peaceful that it bored XGaster and he decided to overwrite it after merely two days.
  • We Hardly Knew Ye: She is easily the most underdeveloped of the X-Tale cast. Her timeline is barely explored and she doesn't even get a speaking role before XGaster erases her. Sorta justified, as her timeline only lasted for two days.

A spider-monster with a love for baking. Was the receiver of the heart locket in X-Tale's fourth timeline.
  • Badass Bystander: Was this in the fourth timeline, where she restrained a Brainwashed and Crazy X-Frisk, so X-Chara could get to XGaster.
  • Informed Ability: Her character profile states that she has a poisonous bite that can cause victims to hallucinate. She has yet to use that ability in canon, however.
  • Ship Tease: With X-Frisk. A lot of official art has them going on dates and kissing. Her animated short also hinted that she might have a crush on him, giving him food for free and calling him a "cute dork".
  • Whip It Good: Is always portrayed wielding a whip in the official artwork.

The captain of the Royal Guard. Was the receiver of the heart locket in X-Tale's fifth timeline.
  • Berserk Button: Hurting or threatening her loved ones is this to her.
  • Blood Knight: Downplayed. While she does love a good fight, she will not keep beating on an opponent who is clearly in no condition to fight back.
  • Butch Lesbian: Is just as physically capable as ever and had a romantic relationship with X-Alphys in the fifth X-Tale timeline.
  • Eyepatch of Power: Just like the original.
  • Honor Before Reason: It was her refusal to kill XGaster, despite knowing of his power and what he'd done with it, that ultimately cost her and X-Chara the battle and allowed XGaster to overwrite her and the timeline yet again.
  • The Mentor: To X-Chara in the fifth timeline.
  • The Paragon: Was this before XGaster overwrote her. She always stood up for what she believed was right and in the fifth timeline was responsible for Alphys finally gathering enough courage to rebel against XGaster actively. She also gave X-Chara combat training and advised him to fight for justice, not for revenge. Tragically, it was her heroic attitude that ultimately led to her and X-Chara losing the fight against XGaster.

The first creation of X-even Chara and X-event Frisk. Was the receiver of the heart locket in X-Tale's eighth timeline.
  • Adaptational Heroism: While his counterpart from the original Undertale does have his heroic moments, X-Mettaton was ready to defend his creators X-event Chara and X-event Frisk with his life the second he thought they were in danger. Justified, as he was originally created to be their guardian.
  • Bizarre Taste in Food: He keeps chomping down on all sorts of things when X-Frisk and X-Chara first create him, much to their chagrin. His character profile states that his favorite food is souls.
  • Malevolent Masked Men: He is notacibly more aggressive after XGaster overwrites him and dons a mask covering the lower half of his face.

The younger brother of Cross. Was the receiver of the heart locket in X-Tale's ninth timeline.
  • Apologetic Attacker: He tearfully apologizes to Cross after punching him in the face.
  • Beware the Nice Ones: He is just as friendly and peace-loving as his counterpart from Undertale, but more than capable of holding his own in a fight. He's also a lot more willing to hurt innocent people for what he believes is right, to the point he tried to murder Cross and let a child who was standing right next to him perish in the crossfire.
  • Cain and Abel: In the prequel comic he tries to kill Cross several times, in order to stop him from interfering with X-event Frisk's plans. Cross ultimately retaliates by killing him, albeit reluctantly.
  • Cruel to Be Kind: He intentionally breaks Cross's heart by viciously attacking him several times, so he won't keep trying to stop X-event Frisk and get hurt.
  • Hypocrite: In the prequel comic he and the majority of the main cast betrayed and tried to kill Cross multiple times. Yet for some reason he is diappointed and upset when Cross finally fights back.
  • Morality Pet: To Cross in the prequel comics. Subverted, as Cross eventually kills him after realizing he's on X-event Frisk's side.
    • X-Tale IX briefly makes it seem as though he's going to become one to XGaster and X-event Frisk. It's ultimately subverted, as both of them are way too far gone for him to have any positive influence on their corrupted minds. X-event Frisk tries to rush their friendship, because he believes that teaming up the usual way will merely result in a repeat of the last few timelines, which ends up alienating X-Papyrus instead (though he does accept the heart locket) and XGaster, as usual doesn't even entertain the thought that what he did to his sons and his creations was wrong and cruel, instead smugly dismissing both X-Papyrus' attempt at reasoning with him and X-event Frisk's emotional breakdown afterwards.
  • Sinister Scythe: Wields one in his official art.
  • Would Hurt a Child: He fires several gaster blasters at Cross, seemingly not caring that an innocent monster child was standing nearby.


"I truly comprehend your pain."
The loyal assistant to XGaster who follows his orders without question. She managed to survive alongside him when X-Tale was corrupted and has since been carrying out his work for him, watching over the main cast.
  • Badass Bookworm: Not the least bit impressed by Underfell!Asgore's threats.
  • Break the Cutie: She started out as a well-meaning, if timid, person who did her best to stop XGaster from using the OVERWRITE-button without him noticing. When he realized she was secretly working against him, XGaster proceeded to use the OVERWRITE-button on her, in order to shape her into the cold, undyingly loyal assistant we see in the present.
  • The Friend Nobody Likes: Supplementary material reveals that she became this to the rest of the X-tale cast, once XGaster overwrote her. Barely anyone can tolerate her Lack of Empathy and worship of XGaster. And even though X-Undyne still tries to make things work between them, it's clear that she's just as freaked out by the current X-Alphys as the others are.
  • Hidden Depths: In X-tale X she actually admits in a journal entry that she thinks XGaster is in the wrong and that she doesn't like how he treats X-Chara and X-Frisk. She also shows concern for Cross both in the X-tale timelines and in the series' present, internally apologizing for the trouble X-event Chara's meddling has gotten him in.
  • My Master, Right or Wrong: Despite clearly being uncomfortable with XGaster's actions in the X-Tale timelines, she never does anything to interfere with or even dissuade him from his plans. 0.4 implies there's some kind of Mind Manipulation at play and in X-Tale V it's all but confirmed her present self is a result of him overwriting her as punishment for her attempted betrayal. In X-tale X she admits to herself that she disapproves of his cruel treatment of X-Chara and X-Frisk, but decides to redact that statement from the journal entries.
  • Not So Stoic:
    • She seems to be completely emotionless at first, but after Underfell!Asgore attacks her, she looks pretty annoyed. This could very well also be XGaster speaking through her.
    • In X-tale X she's noticeably flustered by X-Undyne.
  • Number Two: She is XGaster's loyal right-hand-woman though not entirely by choice.
  • Punchclock Villain: She functions as XGaster's assistant and has no interest in joining in in fights, as long as they don't interrupt her work.

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