Killer sans

Killer sans holds a knife and uses it for combat is not a monster or a human but a mix from resting with chara over and over made him something else in his 3 stage or will kill on sight. His backstory:killer sans was normal at frist but chara kept killing and resting again and again every time they asked killer if they wanted to Join the m he always said no but the human got tired of this and coded the game where sans said yea instead of no when this happened killer sans started killing monsters even his own brother he got filled with dt which made him like this and they rested makeing him know to be killer sans.story: you were walking around in the underground and killer sees you and he will kill you so good luck also sorry for the picture