Killer is a skeleton. Outfit: Darkened blue jacket with a fluffy hood (often depicted as having a black stain on the chest), black turtleneck, shorts with inverted colors, shoes instead of slippers. Physical: eye socket, usually his right one is "droopy" and half closed, black liquid dripping out, red soul (shape depending on stage). Dripping determination: The black stuff often seen dripping out of Killer's eye sockets is dripping determination, how much of it is dripping is depend on stage.