Error, Geno and Fatal Error

All three - Error, Geno and Fatal Error, are Geno, but in different timelines.
They love chocolate because of the determination that the geno once injected into itself.
Such tsunderes also date Reaper, but due to circumstances, Geno simply became an error in one timeline, and then became a fatal error, and Geno simply exists.

Appearance: Blue and red eyes. Right eye socket is red and streaked. Blood is coming from the mouth. White jacket, black shorts and a T-shirt. White slippers. Red scarf, inherited from my brother.

History: This is Geno from another timeline, Error wanted to kill him, but what happened happened, now he has partially gone crazy, fixated on searching for the codes of his lost brother, Papyrus, destroying and stealing the codes of worlds

character: cold, purposeful
Preferences: silence information about codes.

Abilities: Red Strings, Gaster Blasters, etc.

Appearance: White skeleton, white lugs, blood coming from the mouth, left eye socket leaking and covered by a large lug. Brother's red scarf. White jacket, white shorts, white T-shirt, slippers.
History: He was Sans in the genocidal timeline and watched time and time again as the player killed his world, including his brother Papyrus. Sans injected himself with determination, the left side of his skull began to melt, and pieces of his monster soul began to shatter. Upon dying, he managed to enter a permanent loading screen with a chest wound and lag.
Character: withdrawn, bold, serious.
Preferences: watching the Andernovela series, puns, warmth, but not confessed.
Abilities: teleportation, gaster blasters.

Appearance: Blue scarf, black bones, black face, red bones on the arms and legs, red eye sockets with a yellow pupil in the right eye socket and a yellow-blue pupil in the left. Dark blue cape. Blue tear threads. Black sandals.
History: This is Geno, who, after falling into the Anti-Void, lost his memory and became like this. He destroys alternate universes.
Personality: Not very tactile, as contact causes blindness and swollen eyes. Mistrustful and constantly suspicious. Easily angered.
Preferences: calm, andernovela series, knitting
Abilities: Blue Thread Master Blasters, Teleportation