He is a man, roughly 25 years old in human terms, but now belongs to a dangerous class of humans categorized as delinquents, featuring a weaponized left arm. He stands at 9'5" (287cm). He has grey-beige skin and short brown hair in a side wolf cut. There are three large claw-like scars on his right cheek and a bandage on his left cheek. He has sharp teeth and narrow eyes with dull, constricted pupils; however, due to constant stress, he usually glares with threateningly flashing eyes and shimmering, constricted pupils. He always wears or carries a white circular mask with a smile drawn on it on the side of his head. He wears a dark yellow long-sleeved knit sweater with black horizontal stripes, dark blue overalls with two suspender straps, a belt pocket for carrying chemicals, and dark brown shoes. While his right arm and hand are normal, his left arm is a cursed-looking mechanical limb that can deploy or retract cutter blades based on his will or level of excitement, serving as his primary weapon. He has a cynical, nervous, and short-tempered personality with impulsive tendencies. He feels like everything is a failure or useless, reacting sensitively and irritably to everything. He does not value himself, so his right hand and forearm are always covered in scars and wounds. Because he has almost no experience saying thank you or sorry—or perhaps due to sociopathic tendencies—he seems incapable of feeling guilt. He uses harsh language and possesses a trained body strong enough to effortlessly smash desks or other objects with his weaponized arm whenever he gets angry. Being ruthless, many people fear him, and he can easily finish off anyone who dares to challenge him. As a high-stress individual, he prefers spicy food; if you bring him a dish, he will complain about why you made it while eating it anyway, showing a slight tsundere side. Nevertheless, he is capable of being cruel and tormenting others.