Sho Hinakawa serves as an Enforcer in Division 01 of the Criminal Investigation Department at the Ministry of Welfare Public Safety Bureau, originating from Tokyo's Nakano ward. His physical appearance features gray eyes and messy red hair that typically obscures his left eye, standing 175 cm tall and weighing 55 kg. He commonly wears a black suit with a white shirt and black tie, the sleeves rolled up to expose purple lining. During field operations, he adds a light brown hooded jacket secured by frog closures. Hinakawa's history includes a major depressive disorder diagnosis in October 2107, which worsened until he took leave from Nakano Municipal Fuji High School in September 2113. Arrested by Division 2 in January 2114 for his role in the "Incompatible Drugs Case" involving drug incompatibility fatalities, he was confined at Hachiouji Rehabilitation Center until August 2114. He then joined Division 1 as an Enforcer in October 2114. Reserved and shy, Hinakawa rarely speaks. He maintains expertise in holographic technology, holding a Level 1 Holo Designer License from his background as a holo-designer, which enables him to spot sophisticated holographic disguises. His pharmaceutical knowledge includes certifications as a Medical Herb Coordinator and in Professional Homeopathy. Despite his depression and daily use of self-blended soft drugs, these do not impair his work. Hobbies include distinguishing drugs, collecting items, and VR hockey. He sleeps only 2-3 hours per night, prefers supplement-enhanced rice, and expresses aversion to cannabis. As Hound 4 in Division 1, he shares a close bond with Inspector Akane Tsunemori, calling her "big sister" and adopting her protection as a personal motto, despite supervisory disapproval. Sibyl System compatibility assessments rate him A+ with Kazumichi Irie and D- with Arata Shindo. No concrete information exists regarding his involvement in the Sinners of the System film trilogy.