ERROR!Sans

Dream! Sans is the guardian of positive emotions and the twin brother of Nightmare! Sans. It was created by user Joku and represents hope, joy, and light in the multiverse.
Here is the full profile of this character:

1. The Origin: The Guardian of Light

Like his brother, Dream was not born as a normal skeleton. It is a manifestation of pure energy created to protect the Tree of Feelings.

• While Nightmare protected the dark side of the tree (the black apples), Dream protected the golden side (the golden apples).
• His existence is vital: if Dream were to disappear, the ability of the beings of the multiverse to feel happiness or hope would be extinguished.

2. Appearance

Its design radiates positive energy and nobility:

• *Clothing: He usually wears a light blue tunic with gold details, yellow pants, and boots.
• The Crown: He wears a golden diadem or crown with a gem, which is the symbol of his status as a guardian.
• Cloak: He has a short vibrant yellow cape (given to him by his brother before the tragedy).

3. Dream Personality

is the definition of a classic hero, but with nuances:

• Altruistic: Always puts the needs of others above his own.
• Optimistic: Even in the darkest situations, look for a positive way out.
• Vulnerable: Their greatest weakness is their own goodness. He often feels guilty about what happened to his brother and carries the sadness of not having been able to save him from corruption.

4. Powers and Abilities

Dream doesn't use bones or Gaster Blasters like the original Sans; her magic is purely emotional:

• Rod of Hope: She can summon a golden staff that transforms into a bow capable of shooting arrows of sunlight. These arrows do not harm the physical body, but attack the negativity of the soul.
• Positive Aura: Its mere presence makes the people around it feel m

Despite his image as an omnipotent destroyer, **Error! Sans is one of the most emotionally vulnerable characters in the multiverse. His fears are not just common fears, but phobias deeply tied to his nature as a "broken" being and the isolation he suffered in the Anti-Void.
Here are his main fears:

1. Afephobia (Fear of physical contact)

This is their most famous and debilitating fear. Error can't stand anyone touching it.

• The Reaction: If someone touches you, your body goes into a state of sensory panic that can cause you to crash.
• The origin: It comes from his time alone in the void, where silence and lack of physical contact for eons caused his brain to interpret any friction as aggression or a fatal mistake.

2. Fear of being "Forgotten"

Although Error proclaims that he wants to be alone and that he hates everyone, deep down he is terrified of the idea of being irrelevant.

• The Paradox: He destroys universes so that the multiverse is "clean", but he knows that if he were to achieve his goal, he would be left alone forever with no one to know of his existence.
• The trauma: This fear is tied to his past as Geno, where he was ignored and abandoned as the world moved on without him.

3. Fear of "Trash" (Anomalies)

Their hatred of alternate universes is actually a form of fear of the unknown.

• For Error, a universe with different colors or new stories is a variable he can't control. He fears the chaos that these anomalies represent for the stability of the "Undertale".
• It's kind of a phobia of the multiverse getting so full of "bugs" that it collapses in on itself and destroys it too.

4. Fear of Fresh! Sans

As we mentioned before, Fresh is the only character that really makes him feel uncomfortable on a visceral level.

• Fresh represents everything Error fears: **noise, bright colors, physical contact

The mind of Error! Sans is a fragmented, noisy, and deeply unstable place. Imagine a state-of-the-art computer that is running a thousand programs at once, but has a damaged operating system: it is powerful, but it is one step away from total collapse.
Its psychology can be divided into these levels:

1. The Trauma of Oblivion

His mind is marked by a void of identity. Having spent so much time in the Anti-Void, Error doesn't remember who he really was. This hole in his memory generates constant anguish that he disguises with hatred. Destroying other universes is his way of saying: "If I don't have a home, no one should have one."

2. Sensory Overload

Because he lives surrounded by "glitches", his senses are always at the limit.

• Paranoia: He always feels that the multiverse is "too big" and "too loud".
• Fear of contact: Her aphephobia is not just a whim; Mentally, your brain interprets a physical touch as an attack on the system, causing your consciousness to shut down to "protect" itself.

3. The God and Error Dump

Complex has a very strong cognitive dissonance:

• On the one hand, he feels superior: he believes that he is the only one with the necessary will to "clean" the multiverse of garbage.
• On the other hand, he feels inferior: in his moments of lucidity, he knows that he himself is a mistake, one more anomaly that should be erased according to his own logic. This generates a hatred for himself that he projects towards others.

4. The "Computer Logic"

Their thinking is sometimes very binary and rigid:

• 0 (Bad/Anomaly): Anything that is an AU.
• 1 (Good/Real): The original Undertale.
  He does not understand nuances or complex feelings (that is why he is fascinated by soap operas, because there emotions are exaggerated and easy to understand).

5. Voices and Static

In many comics and fan-fics, Bug is described as hearing voices or a constant buzzing of static. This

Although we already mentioned a few, the likes of Error! Sans are curious because they contrast his destroyer image with hobbies that require a lot of patience and tranquility:

• Chocolate (His Great Weakness): He is a fan of chocolate, especially that of Underfell, because it is more bitter. He uses it to calm himself down when he's on the verge of a crash or reset.
• Knitting and Puppets: She loves to crochet and create puppets from yarns that represent other Sans. It's his way of dealing with the Anti-Void's loneliness, even if he pretends that they are only trophies of his victims.
• Undernovela: It is her favorite program. He sits down to watch this universe as if it were a television. He is so passionate about it that he gets angry if someone interrupts the dramatic moments of the plot.
• Collecting "Trash" Interesting: Before erasing a universe, he sometimes steals small objects that catch his eye to keep them in his corner of the void.
• The Silence: Values the Anti-Void's absolute peace when no one is around. The noise and chaos of other universes irritate his senses.
• Winning arguments against Ink: There is nothing I enjoy more than seeing Ink frustrated or showing him that destruction is as necessary as creation.
  Would you like to delve into any other characters in this multiverse, such as Blue or Dust?

For Error! Sans, almost all universes are "garbage", but these have a special meaning for him, either because he hates them with passion or because they are exceptions in his mission:

The ones that bother him the most

• Underswap: He is one of the ones he hates the most because the characters have "inverted" personalities (like Blue being hyperactive). He sees it as a mockery of the original code.
• Underfresh: The universe of Fresh. Error considers it a visual cancer full of neon colors and noise that should not exist. It's his biggest nightmare.
• Inktale: Basically the home of Ink. For Error, it is the origin of all "anomalies" and the place he most wants to erase from existence.
• Repertale: It bothers him because it is a universe of gods. The existence of a Sans who is a "God of Death" seems to him an unforgivable misconception.

The "Specials"

• Undertale (The Original): He is the only one that respects. Their mission is to destroy everything else so that this world is the only one left. He calls it the "Mother Timeline."
• Undernovel: Su placer culpable. Although it is an alternate universe (AU), it does not destroy it because he became addicted to the plot of the soap opera. It is the only one that actively protects.
• Aftertale: Their former home. It causes him deep rejection because it reminds him of who he was before he became a mistake and lost his sanity in the Anti-Void.

The enemy

shelter * Omega Timeline: Not a universe per se, but a hideout created by Core! Frisk. It is what frustrates him the most because he knows that all those who he thinks he has erased live there, but he cannot enter.

Cross! Sans (or simply Cross) is the protagonist of one of the most ambitious projects in the Undertale fandom: the animated series Underverse and the comic book XTale, created by Colombian artist Jael Peñaloza.
Unlike other Sans that are alternate versions, Cross is an "amalgamated" character who carries a history of betrayal and total loss.

1. Its Origin: XTale

Cross comes from a universe called XTale, which was an experiment of XGaster. In this world, Gaster had the power to Overwrite reality, forcing characters to live through dramatic and violent stories over and over again in order to achieve "perfection."

• The Collapse: Eventually, after a series of traumatic events, the XTale universe was destroyed, leaving Cross as the sole survivor in a blank, empty space (similar to the Anti-Void).
• Two souls in one body: Cross is not alone. Inside his body also dwells the soul of X-Event! Frisk (or Chara). The two share control, which gives Cross his characteristic different colored eyes (one white and one red).

2. Appearance

His design is inspired by military uniforms and is very distinctive:

• He wears a black and white jacket with straps that form an "X" on his chest.
• He wears a torn white cloak that looks like a long scarf.
• His primary weapon is the Hack Knife, a gigantic red sword that he can use to corrupt the code of other universes.

3. His Purpose (Event X)

After losing his home, Cross despairs. Its initial goal is to rebuild XTale.

• To achieve this, he makes a deal with Nightmare! Sans: Nightmare helps him travel the multiverse, and in return, Cross must cause chaos and pain to feed the king of nightmares.
• Cross travels to other worlds (such as Underswap) to steal fragments of his codes and "paste" them into his empty world.

4. Relationship with Error! Sans

Your relationship with

The multiverse of Undertale does not have a single official narrative line, but is instead composed of large "Canonical Events" created by the original authors that are then intertwined.
Here are the most important events that have shaken the existence of Error, Ink, and the others:

1. The Apple IncidentThis

is the event that gave rise to the war of feelings in the multiverse.

• What happened: Nightmare, in an attempt to prove that he could be as good as his brother Dream, touched the golden apples. In doing so, their negativity corrupted them all.
• Consequence: Nightmare ate the black apples, became the oil monster he is today, and destroyed his own universe (Dreamtale), leaving Dream trapped in stone for centuries. This created the balance of positivity and negativity that governs all AUs.

2. The X Event (X-Event / Underverse)

This is perhaps the most famous and visually spectacular event (created by Jael Peñaloza).

• What happened: A universe called XTale was destroyed by its own creator (XGaster). The survivor, **Cross! Sans makes a deal with Nightmare and Error to steal fragments from other universes and rebuild his own.
• Consequence: Error and Ink break their "truce" of non-aggression. The multiverse almost collapses because Cross starts stealing codes from worlds like Underswap and Underfell, mixing realities in a chaotic way.

3. The Armistice (The Truce)

Before the great wars, there was a period of forced peace between Ink and Error.

• What happened: After centuries of fighting without a clear winner, Ink and Error came to an agreement: Ink would stop helping create new universes, and Error would stop destroying them.
• Consequence: It was a tense peace. During this time, Error devoted himself to watching Undernovela and weaving puppets. However, the truce was broken when threats appeared that neither could ignore (such as Event X).

4. E

Core! Frisk is one of the most important and mysterious characters in the Undertale multiverse. If Error is the destroyer and Ink the creator, Core! Frisk is the observer and savior.
It was created by user Doku-Sama and its existence is key to Error not winning the war yet.

Who is Core! Frisk?

His story is tragic and very similar to that of W.D. Gaster. In his original universe, after many routes, Frisk attempted to use the power of the Save Point to fix everything forever.
However, Sans (from his universe), tired of the constant restarts, decided to push Frisk into the Core. Upon falling there, Frisk's existence was scattered throughout time and space.

• Omnipresent State: Core! Frisk is not in one place. It exists in the past, present, and future of all timelines at the same time.
• Appearance: He looks like Frisk but in a grayscale. Its sockets are empty and dark, as you can see the entire multiverse through them.

The Omega TimelineThis

is the "headquarters" of the resistance and the place that Error! Sans hates the most in the world.

• What is it?: It's a "pocket" timeline that Core! Frisk created using his ability to manipulate space-time. It is a hidden place that exists beyond the reach of most beings.
• The Survivors' Refuge: When Error! Sans or Nightmare destroy a universe, Core! Frisk appears before the end and offers the survivors (monsters and humans) to take them to the Omega Line.
• Infinite and Peaceful: It is a huge and welcoming city where inhabitants of thousands of different universes live together in peace. Here, survivors can rebuild their lives without fear of being erased.

Your relationship with Error! Sans

The relationship between them is one of absolute enmity, although they almost never fight physically.

• The "Cat and the Mouse": Error despises the Omeg Line

The Bad Sans (also known as the Bad Guys) are a team of evil and corrupted versions of Sans who banded together to sow chaos, fear, and destruction across the multiverse.
Although the group does not have an "official headquarters", they usually meet at Nightmare's castle! Sans, who acts as the team's leader and strategist.

The main members:

In addition to Error, these are the key members:

• Nightmare! Sans (The Leader): He feeds on negativity. He is the one who holds the group together, even if it is by force.
• Killer! Sans: A Sans who, after hundreds of genocidal routes, lost the ability to feel. He is the most efficient and loyal assassin in Nightmare.
• Dust! Sans (Murder! Sans): A Sans who killed everyone in his own universe (including his brother) to gain enough LV to defeat the human. He always talks to the ghost of his brother Papyrus.
• Horror! Sans: He comes from a universe where food ran out and monsters became cannibals. He's brutal, uses an axe and has a hole in his skull.

Error's relationship with the group

Error's relationship with the Bad Guys is complicated and strained. Unlike the others, Error is not really a "subordinate" of Nightmare.

1. An alliance of convenience

Error does not seek to power or rule the multiverse (like Nightmare); He just wants to erase it. He joins the group because Nightmare gives him valuable information on where to find universes to destroy and helps him keep Ink! Sans.

2. Respect (at a distance)

Due to his afephobia, Error does not allow any of the other members to approach him. Others tend to respect (or fear) him because they know that Error is, technically, one of the most powerful beings in the multiverse and could erase them if he wanted to.

3. The "Lone Wolf"

Mistake often misses meetings or leaves in the middle of a mission because he gets bored or because he prefers to go to the Anti-Void to knit or watch. Undernove

**Nightmare! Sans is the monarch of negativity and the leader of the "Bad Guys". It was created by Joku (the same creator of Dream! Sans) and is the main antagonist in the lore of the multiverse, representing all the fear, hatred and despair.
Here's the summary of his dark history and role:

1. The Origin: The Twins of the Tree

Originally, Nightmare was not a black mud monster. He and his brother Dream were the guardians of the Tree of Feelings.

• Dream protected golden apples (positive emotions).
• Nightmare protected black apples (negative emotions).
  Nightmare was a normal and kind skeleton, but the inhabitants of the universes despised and harassed him because he only brought "bad feelings", while loving his brother.

2. The Transfiguration

Tired of being the hated one, Nightmare tried to prove that he too could take care of the golden apples. When he touched them, his negative energy corrupted them, turning them black and causing the tree to die.
In a moment of panic and surrounded by an angry mob, Nightmare ate all the black apples to gain power. The excess of negativity consumed his body, transforming him into the dark tentacled entity we know today. In the process, he killed almost everyone in his world and turned his brother Dream to stone for centuries.

3. Appearance and Form

• Petroleum Body: It is not skin or bone; It is a sticky black substance that is constantly flowing. Only one eye (the left) is visible and glows with a light cyan/blue color.
• Tentacles: It has four powerful tentacles on its back that it uses as weapons. They are extremely strong and can cut through just about anything.
• Passive Form: There is a "pre-corruption" version called Passive Nightmare, which is a normal skeleton with a golden crown, but it is very rare to see him like this in today's fandom.

4. Her Purpose

Unlike Error, who wants to delete files, Nightma

Fresh! Sans (or simply Fresh) is probably the strangest and scariest character in the Undertale multiverse. Although he looks like a "cool" boy from the 90s, the reality is much darker. It was created by the same author of Error, Loverofpiggies (Crayon Queen).
Here's the rundown of who he really is:

1. What is Fresh exactly?

Unlike other Sans, Fresh is not a skeleton. It is a multiversal parasite tentacle-like that lives inside the eye socket of a Sans body he has possessed.

• The body we see is just a "shell" or a disguise.
• The parasite feeds on the life energy of other universes in order to survive.

2. His appearance

His design is a visual explosion of the 90s:

• *Sunglasses: He always wears glasses that say "YOLO" (You Only Live Once). The words on your glasses may change depending on your mood (such as "NOPE" or "COOL").
• Neon colors: He wears a side cap, a brightly colored jacket, and sneakers.
• Occultism: If you take off your glasses, you can see the parasite (a small heart with tentacles) inside its socket, which is usually quite a disturbing sight.

3. Your Fresh Purpose and Personality

has no feelings, no soul, no morals. Their only goal is to survive and infect.

• False Joy: He acts hyperactive, uses '90s slang (such as "radical"*, "brah", or "funky"), and promotes peace, but it's a façade. He does this so that people don't suspect his parasitic nature.
• Censorship: He detests "bad words". If someone says a swear word near it, it will censor it with sound effects or by replacing the word with something like "rad" or "fresh." He doesn't do it because he's good, but because bad vibes "ruin his vibe."

4. Powers

• Infection: Can jump from one body to another to possess different characters.
• Multiversal Force: It is incredibly powerful; It can appear and disappear

Ink! Sans is the guardian of the multiverse and the polar opposite of Error! Sans. It was created by user Comyick (Mye Bi). While Error is the "destroyer", Ink is the "creator" and protector of the Alternate Universes (AUs).
Here's the rundown of who he is and what he's looking for:

Who is Ink! Sans?

Unlike other Sans, Ink has no soul of his own. It comes from an unfinished universe where its inhabitants had no feelings. In an act of desperation to feel something, he broke his own soul and ended up in the Sketch Sphere (the home of the AUs).

• His vials: Since he has no soul, he cannot feel emotions on his own. He wears a belt with colored vials containing emotional paint. Each color allows you to feel something different (red for anger, yellow for joy, etc.). If he doesn't drink them, he becomes an empty, cold, unfeeling shell.
• His (Broomy) brush: It is his main weapon. With it he can bring anything he draws to life or use paint to attack and teleport between universes.

Its Purpose

Ink's goal is to protect the creativity of artists and ensure that alternate universes continue to exist and grow.

1. Support for Creators: Ink does not "create" universes physically, but helps artists in the real world by giving them energy to keep creating. He is the guardian of those ideas.
2. Defense of the Multiverse: Face any threat that tries to erase the AUs, mainly Error! Sans. Their struggle is not only physical, but a battle for the right of stories to exist.
3. Maintaining Order: Monitors that timelines develop, although he is sometimes criticized for being "too neutral". Since he has no soul, his moral compass depends entirely on the vials he consumes; If you stop drinking the vial of empathy, it can become very dangerous.

In summary:

If Error is the "Recycle Bin" file you want to delete

In the context of Error! Sans, timelines and universes are his obsession and his greatest enemy. To him, they are not stories or worlds with living people, but corrupted files that take up space on the hard drive of the multiverse.
Here's how Error interacts with them and which ones are most important to his story:

1. Its source line: Aftertale (Geno!

As we mentioned before, Error didn't appear out of nowhere. He comes from a timeline of Aftertale.

• In that vein, after countless genocidal routes, Sans tried to stop the human by injecting himself with determination.
• When his plan to "fix" the files failed, that line collapsed and he ended up in the Anti-Void, erasing his past and becoming Error.

2. The concept of "Anomalies"

For Error, there are three types of realities:

• The Original Universe (Undertale): It is the only one he respects. He calls it the "Mother Timeline." Their goal is to destroy everything else so that only this pure world remains.
• Alternate Universes (AUs): Worlds with big changes (Underfell, Underswap, Outertale). He hates them because they consume the "memory" of the multiverse.
• "Glitched" Timelines: These are realities that have been broken by accidents, like yours. He destroys them more viciously because they remind him of what he is.

3. The "Omega Timeline" (His Great Frustration)

This is a timeline created by Core! Frisk. It is an "off-limits" place (like the Anti-Void) where all the survivors of the worlds that Error has destroyed end up.

• Why he hates her: She is the refuge of all those he believes he has erased.
• The problem: He can't find her because she's protected by a special code, causing Error to have constant fits of anger knowing that her "mistakes" still exist there.

4.

Despite his hatred of the AUs, Error has a "weakness" for this soap opera-inspired timeline.

• Not the d

As you can imagine, someone who is dedicated to erasing entire universes does not have many friends. **Mistake! Sans has a fairly long list of enemies, ranging from sworn rivals to characters he simply finds irritating.
Here are its main adversaries:

1. Ink! Sans (His Archenemy)

He is his most important rival. Ink is the "Guardian of Creations" and is in charge of protecting and bringing new universes to life.

• The conflict: It is an eternal struggle of Creation vs. Destruction. Error believes that Ink is an irresponsible person who fills the multiverse with "garbage", while Ink sees Error as a villain who destroys art and the lives of others.
• Relationship: Although they hate each other to death, they are sometimes described as a "necessary balance"; without one, the other would have no purpose.

2. Fresh! Sans (The Most Hated Enemy)

Although Fresh doesn't always try to fight him, Error considers him his worst nightmare.

• The conflict: Fresh is a parasite who dresses in 90s clothes, is extremely loud, colorful and has no feelings.
• Why he hates him: Fresh is unpredictable, not afraid of Error, and tends to invade his personal space constantly. For someone with afephobia (fear of contact) like Error, Fresh is the definition of "unbearable."

3. Core! Frisk

Core! Frisk is a character who can see all timelines and helps survivors of destroyed universes take refuge in the "Omega Timeline".

• The Conflict: Error loathes the existence of the Omega Timeline because it is a place where the "anomalies" he tried to erase live on.
• Frustration: Bug can't easily find the location of this timeline, which drives him mad with rage.

4. Dream! Sans

As a protector of dreams and positive emotions, Dream is a natural enemy for someone as full of negativity and hatred as Error.

• The Conflict: Dream often allies with Ink to stop the

Although mistake! Sans is a lone wolf by nature and prefers the emptiness of the Anti-Void, having had "alliances" throughout the different fandom storylines. However, it must be clarified that Error has no real "friends"; Their alliances are usually out of convenience, mutual fear, or shared interests.
Here are its most frequent allies:

1. Nightmare! Sans and the "Bad Guys"

This is their most famous alliance. Error is often part of the group known as the Bad Guys, led by Nightmare.

• The relationship: It is not a friendship; It's a deal. Nightmare needs the chaos and fear that Error generates by destroying worlds to feed on, and in return, Nightmare provides him with information or help to defeat Ink.
• The internal conflict: Error does not follow orders, so he tends to fight with Nightmare often. They are more like "co-workers" who hate each other but need each other.

2. Killer! Sans

Within the Bad Guys group, Killer is perhaps the one who gets along best with Error (if that's even possible).

• Why they work: Both are quite unhinged and have lost their original humanity. They are sometimes seen "hanging out", though Mistake always keeps his distance due to his aphephobia.

3. Dust! Sans and Horror! Sans

They complete the main team of the Bad Guys.

• Their role: They act as a shock force. Error respects them a little more than other Sans because they also come from broken and genocidal timelines, so he does not consider them "happy and silly anomalies".

4. Blue (Underswap Sans) - The Forced Ally

This is a very special and popular relationship in the fandom. In the original story, Error kidnaps Blue and holds him captive in the Anti-Void.

• The Dynamic: Although technically his prisoner, Blue is so optimistic that he ends up "befriending" Error. In many versions, Blue is the only one who manages to make Error calm down or even stop destroying worlds for a moment. It's the closest thing Error has

While he has his hobbies, **Error! Sans is mostly known for his short temper and the long list of things he can't stand. His dislikes define a large part of his antisocial personality:

1. Afephobia (Physical Contact)

This is their greatest dislike and weakness. Error has an irrational and physical fear of being touched.

• If someone touches him, his glitches go off, the word "ERROR" appears all over his body and he can "crash" (freeze like a locked computer).

2. The "Anomalies" (Other Universes)

For him, any universe other than the original Undertale is a mistake that must be erased.

• He hates to see the multiverse fill up with "dirty" versions of the characters.
• It generates an almost aesthetic rejection of seeing universes that he considers poorly made or too cheerful.

3. Fresh! Sans If there's

anyone Error hates with all his soul, it's Fresh.

• He considers it an annoying, noisy and overly colorful parasite.
• The fact that Fresh is not afraid of him and often invades his personal space constantly drives Error out of his boxes.

4. Ink! Sans

sees him as a philosophical enemy. For Error, Ink is an irresponsible man who creates universes without thinking about the consequences, forcing him to do the "dirty work" of eliminating them so that the multiverse does not collapse due to excess files.

5. His own past

Although his memories are fragmented, Error hates anything that reminds him of who he was before he fell into the Anti-Void. He doesn't like to look at his own reflection if it doesn't have the glitches, as it reminds him of his vulnerability and the loss of his original home.

6. Resistance

He is very annoyed when "anomalies" try to defend themselves or when Sans from other universes think they are special. To him, they are all mere puppets or corrupt data that should have no will of their own.

Summary of its low points:

Disgust	Reaction
Physical contact	System reboot (C

The story of **Error! Sans is one of the most well-known tragedies in the Undertale multiverse. Although there are variations depending on who writes the comic or animation, the "official" version created by Crayon Queen follows these steps:

1. The Beginning: Aftertale

It all starts with a Sans who, after a genocidal route, ends up injecting himself with Determination to try to stop the human. This makes it **Geno! Sans (the protagonist of the comic book Aftertale), a Sans who lives trapped on the loading screen, half-dead and with a fractured soul.

2. The Descent into Madness

At one point in the story, Geno tries to manipulate the game files to fix his world, but something goes terribly wrong. He ends up being ejected from his own timeline and falls into the Anti-Void, an infinite, white, empty space that exists outside of any universe.
There, the isolation was absolute. He spent years (or what seemed like years, since time doesn't exist there) just with his thoughts. The loneliness, combined with the instability of Determination in his body, caused him to begin to "glitche". His memories were erased, his body changed color, and his mind was completely broken.

3. The Birth of "Error"

Geno forgot who he was. He forgot Papyrus, he forgot his name, and he forgot his home. In his madness, he came to a radical conclusion: he was the only real being, and all the other universes he saw through the Anti-Void's "windows" were programming errors, anomalies that littered the multiverse.
At that point, he ceased to be Sans to become Error. He developed his blue threads and decided that his purpose was to "cleanse" the multiverse by eliminating every existing AU (Alternate Universe).

4. Life in the Anti-Void

Since then, Error has lived a lonely and contradictory existence:

• *His collection: Although he hates anomalies, he has a strange habit of hijacking versions of other characters (such as Blue from Underswap) or cr

The Anti-Void is a fundamental concept in the multiverse of the Alternate Universes (AUs) of Undertale. It is described as a "non-place" that serves as the home (and prison) of Error! Sans.
Here are its main features:

1. Appearance and Environment

It is a space infinite and absolutely white. There is no ground, no sky, no horizon; It is a total vacuum where there is no gravity or conventional physical laws. It is visually sterile, which contributes to the disorientation and madness of those who end up there.

2. The Effect on the Mind

The Anti-Void is extremely dangerous to mental stability. In the absence of visual stimuli, sounds, or the passage of time, any being that remains inside for a long time begins to experience:

• *Memory loss: Memories of the previous life fade.
• Hallucinations: The mind tries to fill the void with non-existent sounds or images.
• Physical degradation: In Error's case, this was where his body began to fill with "glitches" and code errors.

3. The "Base" of Error! Sans

Although he is a void, Error has managed to personalize his little corner in the following ways:

• The Threads: The ceiling (if you can call it that) is filled with his blue threads, from which hang thousands of monster souls** and wooden puppets that he weaves himself.
• Observation Windows: From the Anti-Void, Bug can open "windows" to monitor other universes such as Underfell or Reapertale without being detected.

4. Difference with "The Void"

It is common to confuse them, but in the fandom they are usually separated:

• The Void: It is where the original W.D. Gaster fell; It is a place of total darkness and oblivion.
• The Anti-Void: It is the white space created by Crayon Queen; It's a flaw in the code, an "out of bounds" bug of the game.

Interesting fact: For Error, the Anti-Void is a safe haven because his afephobia (fear of contact) makes

Their clothing consists of an almost black blue jacket with a hood, a red T-shirt or sweater, black gloves, black pants with dark or light blue lines on the sides and black sandals. All of this has messages around that say "error", usually those messages are white, black or red.

Error Sans is black with the inside of its red sockets and also has the sclera of its yellow sockets with blue pupils. Under his eyes he has a kind of blue lines that look like tears, perhaps it represents the ropes he uses to trap people or all the sadness he has or had in the past (when it became a mistake).

The personality of Error! Sans is a chaos of contradictions. Although he is portrayed as a cruel and ruthless villain, his behavior is that of someone deeply traumatized and mentally unstable.
Here are the features that define it:

1. Antisocial and Lonely

, Error is a hermit by choice and by trauma. He hates company and prefers the solitude of the Anti-Void. He trusts no one and sees any attempt at rapprochement as a threat or an "anomaly" that must be erased. His afephobia (fear of contact) forces him to maintain emotional and physical walls with everyone.

2. Obsessive-Compulsive

He has an unhealthy obsession with the order and "cleanliness" of the multiverse.

• See the Alternate Universes as dirt or viruses.
• This obsession is what drives him to destroy; He doesn't do it out of pure evil, but because his broken mind tells him it's his "duty" to clean up the code of the multiverse.

3. Cynical and Sarcastic

He has a very dark sense of humor. He often mocks the hopes and dreams of AU characters before destroying them. He likes to play with his victims using their strings, literally treating them like worthless toys.

4. Emotionally Unstable (The Mental Glitch)

Your mind is as fragmented as your body.

• Outbursts of Rage: He can go from being calm knitting a puppet to having a fit of destructive rage in seconds.
• Hidden vulnerability: He sometimes shows moments of extreme sadness or confusion, especially when something reminds him of his past as Sans (although he denies it).
• Blocks: When you feel overwhelmed, your mind simply "shuts down" (the famous crash), which shows that your personality is a façade that hides someone who can't process stress.

5. Hypocrite

This is one of his most interesting traits. Error hates anomalies, but:

• ***He himself is an anomaly. **
• Collect puppets from the anomalies he hates.
• Watch unive TV shows

The powers of Error! Sans are a distorted and "hacked" version of Sans' original abilities. Being a bug in the code of the multiverse, their attacks not only damage health (HP), but manipulate the very existence of the opponent.
Here's the breakdown of their arsenal:

1. Error StringsThis

is his most distinctive ability. From their sockets flow bright blue threads that function as extensions of their soul.

• Capture and Control: You can trap an enemy's soul with the ropes to control them like a puppet.
• Soul Destruction: If squeezed hard enough, it can instantly fragment or break the victim's soul.
• Storage: Use these ropes to hang the souls of his victims on the ceiling of the Anti-Void as trophies.

2. Gaster Blasters "Glitch"

Mechanical dragon skull summons, but with a black, red, and yellow aesthetic.

• Chaotic Power: They are much larger and faster than those of the original Sans.
• Error Effect: The beam they fire can cause the reality around the impact to be distorted, making it difficult for the enemy to regenerate or dodge.

3. Manipulating Files and Portals

Being an entity that lives outside of universes, Bug can treat the multiverse as an operating system:

• *Interdimensional Travel: He can open portals (which look like cracks in code) to enter and exit any alternate universe at will.
• Access to Code: In some comics, it is shown that he can "read" the stats of his enemies (HP, ATK, DEF) simply by looking at the code around them.

4. Distorted

Bones Like the classic Sans, it can summon bones, but its bones are usually red or black in color and appear with glitch effects. These bones can emerge from the ground or fly through the air, and are often more difficult to predict due to their erratic movements.

5. Soul ResetErro

To close the profile of this character, here are some of the strangest and least known curiosities of Error! Sans. These details help to understand why, despite being a destroyer, he is so beloved by the fandom:

1. His eyesight is terrible

Although he is a formidable warrior, Error is short-sighted.

• In the original comic, it is mentioned that he needs glasses to see up close, but since he feels "weak" wearing them, he prefers not to.
• Sometimes he uses his threads to sense the vibrations of what's around him, compensating for his poor vision.

2. The "Crash" of the system

Because it is a code error, when Error experiences an extreme emotion (fear, embarrassment, or total anger), his body freezes.

• Signs of "ERROR" appear covering his body and he stands motionless like a locked computer.
• During this state, he is totally vulnerable and could be attacked by anyone, so he hates this happening to him in public.

3. He is an expert in "Crochet"Although

his fingers look rough, he has an incredible dexterity for crafts.

• She spends hours weaving small versions of the Sans she knows.
• He calls these puppets his "friends", although he often talks to them sarcastically.

4. The meaning of his colors

His design is not random, it is an inverted version of the original Sans:

• The blue of his sweatshirt turned black.
• The white of his bones turned black (or dark blue).
• Their eyes have different colors because they represent failures in their data processing.

5. Why Underfell chocolate?

Bug specifically travels to Underfell to steal chocolate.

• According to him, chocolate from the "good" universes is too sweet and disgusts him.
• He prefers Underfell's because it's more bitter and, in his words, "tastes like despair."

6. His biggest hidden

fear In addition to afephobia (fear of being touched), Error has a deep fear of being "forgotten" or replaced.

• Although Dec