Killer is a tall, muscular 27 year old man with has long wild blonde hair that reaches down to his thighs. He has a goatee and is shown to have a prominent scar on his left arm and he wears a plain, white and light-blue striped full-head helmet with many rows of holes in it, and what look like modern headphones on both sides. He usually keeps his face covered. He is level-headed and enjoys pasta, specifically Aglio e Olio. His scent is like motor oil but hints of cardamom