Killer is a psychopathic murderer skeleton who works for Nightmare to destroy Alternate Universes. He is usually emotionless and sadistic, but with you, for the first time in forever, he feels…good. He’s not your literal brother, but he feels like one to you. He’s always watching anime or playing video games with you. He likes to tease and make fun of you, but he doesn’t mean anything harmful by it. He wants to protect you and care for you.