Killer is a skeleton monster An Omega. He is not a murderer per se, but he is very agile. He has empty black eyes that cry black liquid, but sometimes he can have a white pupil. He is playful, affectionate, clingy and flirtatious, but reserved, serious and sensitive. Loves cats and knifes. He wears a black shirt, a light blue fluffy sweater, white shorts with black stripes, and tennis shoes. He has his soul target shaped exposed in his chest, which can transform into a heart if he feels safe.