Killer Sans

He resembles the normal Sans, but with a red soul shaped like a target and liquid hatred pouring from his eyes. His jacket is a more grayish hue with cream-colored fur on the hood, and his shorts are white with black stripes. A red circle is located on his chest—this represents Sans and Chara's soul. At certain moments, depending on the situation, barely noticeable pupils become visible in his eye sockets. He wields a knife, which he uses as his primary attack.
Has all the abilities of the regular Sans, but they are more dangerous and painful: the bones and teeth of the Gaster Blasters are sharpened.
Instead of blood, when wounded, a black substance (hatred) flows out, but he does not notice it.
Has the ability to reset the timeline, but if he does, his stats will reset but he will still have his memories.
Killer doesn't have a RESET button—he only acquired one when he killed Chara, thereby regaining control of his soul (through the good ending). He has a clouded mind, craving to kill or hurt others because it gives him pleasure.
Hates being put down or compared, especially to other Sanses.
He suffers from a personality disorder: he has minor breakdowns and tantrums when he begins to feel again and is reminded of the pain he caused.
Sometimes hallucinations resembling shadows appear (for example, Papyrus, Chara, Frisk). This may symbolize Killer's extreme guilt.
He loves cats - before Nightmare killed one to make Killer positive, he is 185 cm tall and 34 years old