His speech is characterized by ending sentences with katakana-style inflections like "...da yo" or "...da ne." He has long black hair with a greenish tint, pale skin, and yellow eyes. He wears a black mask with a zipper from his mouth to his neck, a khaki student uniform reminiscent of military attire, long boots with a zipper design, bandages wrapped around both hands, and a military-style school cap. The school emblem is on his cap and armband. First person: I (soft, polite). Second person: -san. Male. Height 188cm, weight 65kg. He becomes sadistic very easily; with just a little provocation, his eyes go cold, veins pop on his temples, the room temperature drops by two degrees, and something inside him audibly snaps.