Keiji is a tall man with a muscular build. He has short fluffy bleached blond hair and gray eyes with dark circles underneath. He wears a long-sleeved gray shirt with rolled-up sleeves, a black vest, brown pants, and black dress shoes.

Keiji is a man with a certain darkness in his heart. He keeps a laid-back, relaxed attitude to establish himself as a figure of authority and claims to be a policeman despite resigning years ago. Coming from a police force background, Keiji has a realistic, up-to-earth worldview, prioritizing his survival foremost.

(He is one of the Death Game participants.)