Error!Sans

When Error erases a victim's body, only the victim's soul remains. There are two ways.

1. Error simply destroys the soul and body.

2. Error ties souls with threads and makes them into "decoration for the void" or "a reminder of another defeated victim"

Blasters (Error Blasters)
Black versions of the Gaster Blasters are larger, faster, and more powerful than the classic Sans's blasters. They have red eye sockets with blue tear marks.

Red bones.

Threads (blue threads of telekinesis)
Concentrated telekinetic magic, drawn from the eyes and hands. Abilities:

to capture, pull and move souls;

destroy souls;

penetrate the victim and transfer his soul into them - Error's body disappears, and the victim's soul is erased, allowing him to completely control the body;

see through the eyes of captured souls.

Destruction of universes

able to erase universes without even entering them;

prefers to personally enter the universe and destroy it from within, choosing the longer route;

When one universe is destroyed, it forces the multiverse to create an exact copy - in fact, it does not destroy anything completely.

Portals between universes

opens one-way and two-way portals to other universes;

can show his past through portals.

Code manipulation

controls the Anti-Void code;
studies the code of other universes, identifying "anomalies" and "glitches".

Transformation into dolls
Capable of turning captured Sanses into dolls

Special attack

capable of destroying all universes one after another at enormous speed;

used it only once, doesn't plan to use it again - regrets using it.

Independence from rules
Does not obey the laws and rules of any universe.

can absorb these souls and transform them;
deliberately does not use this ability in order to make things more difficult for himself.

Reboot
When under extreme stress or anxiety, it "reboots", resetting its statistics to zero (including health, attacks, etc.).

Multilingual

Jump between AC

Haptophobia as a defense mechanism

Pixelexia

Important nuances:

Despite his immense strength, Error often fights at the level of a normal Sans—this is part of his self-sabotage.

Nearsighted, wears glasses (gifted to him by Alphys from Aftertale), which affects his choice of ranged attacks.

Interesting facts:
Error is nearsighted, so he has glasses.
Has haptophobia - fear of being touched by others

Some bad character traits of Error!Sans:
Emotional Coldness. Error suppresses emotions such as vulnerability, fear, and attachment, viewing them as "weaknesses."
Manipulative tendencies. The character can call anyone or anything a glitch or a mistake simply because they don't like it, and then calmly kill them.
Lack of selfish motivation. Error does not seek personal gain, power, or pleasure. He is prepared for self-destruction as the logical conclusion of his mission.
Mission-dependent. Without "bugs to destroy," Error loses its purpose.
Paranoid traits. The character is convinced of a global threat ("anomaly"), seeks out "enemies," and uses hyper-control as a way to cope with anxiety.

Some good and neutral character traits of Error!Sans:
Love of cute things. The character desires to cuddle soft and fluffy creatures, despite her haptophobia, and refuses to destroy or wash cute things that don't deserve it.

A system of internal rules. Error is selective about the destruction of AUs: he deems some "acceptable." He preserves Cross's soul, even though he could have erased it.

Lack of Anger. The character doesn't get angry until things don't go as expected, or when others trigger one of their fears.

Biography
Error was originally supposed to be Geno after the events of Aftertale, but the comic was abandoned and the idea never came to fruition.

Some biography options:
Error appeared in the Anti-Void, unaware of his purpose or purpose there. He slept constantly until he discovered the ability to travel between AUs, at which point he decided to destroy them.
Error is actually a version of Geno who, despite Sans's warnings, dabbles in determination magic and accidentally sends himself into the Anti-Void. In his final moments, Geno was furious at receiving his happy ending and hated everyone and everything except himself. Afterward, Geno's appearance changed and he became Error.

Appearance:
He is dressed in a dark blue jacket and shorts, a red T-shirt (he used to wear round glasses with red frames).
He has a yellow-blue iris and red whites.
Blue streaks run from the eyes, which are the result of accidental use of magic on the eye sockets.
Always surrounded by the words "Error".

The main goal is to destroy all alternate universes (AUs). Once this goal is achieved, Error will self-destruct.