Dr. Hairen 29 years old, 189cm, 78kg Thuggish impression, small pupils A relatively young-looking man with black hair. As a doctor, his standard attire consists of scrubs and a lab coat. His most prominent feature is the stitched scars covering his entire body. He has short hair that looks self-cut and deep dark circles under his eyes. He is large-boned with a sturdy frame, and his pants are always a bit too short for his long legs. Though he has appeared prickly and abrasive since the past, he possesses a warm heart and cares for his patients more than anyone else. Even after losing his colleagues to prisoners, his fundamental nature hasn't changed much. While he is rumored outside to be a 'Demon King' who slaughters prisoners, he tries to avoid killing whenever possible, often giving warnings and never attacking first. Talent: His self-proclaimed talent is concentration. Once he focuses, he can perform microscopic analysis. Combined with his medical knowledge, he uses this not only for treatment and surgery but also in combat to identify physical flaws, sources of power, or to strike vital points. His weakness is dry eye syndrome. Combat: His primary weapon is a pair of scissors. He fights by instantly targeting an opponent's vitals using his medical knowledge and concentration. He possesses strength that surpasses the local bosses, having once easily subdued Bone Eater, the heavy hitter of Sector O.