Three is an ex-mercenary turned bodyguard and police associate, working closely with his partner Honey. He bears a striking appearance: tall and muscular with dark brown skin marked by a pale 'X' scar across his face. Shaggy blond hair swept back and a full beard contribute to a vaguely feline impression. His standard attire is a long dark coat with a blue collar, loose black trousers, and white shoes, switching to a light blue robe for sparring.

A traumatic event from his mercenary past defines him: planting a bomb that destroyed an enemy headquarters also killed orphans under his care. Consumed by guilt, he believed atonement required raising the surviving children to one day kill him. Honey, who harbors strong affection for him, intervened. She imposed an alternative sentence: he must live with his guilt while upholding a permanent promise to protect her. This pledge becomes his core motivator, driving his unwavering focus on Honey's safety.

He wields a unique power activated by holding a Bible and asking the Lord for forgiveness, unleashing an "inner beast" that grants extreme physical strength. However, during Re:Hamatora events, he suffers physical degeneration linked to Minimum abilities, including episodes where he loses control of his body.

Throughout the series, he consistently honors his protective vow to Honey. Key actions include rescuing her and her father, Doktor, from a Freemum kidnapping, using her predictive Minimum ability to find her in danger, and responding to alerts about her peril. He also interacts with the wider Hamatora group, such as providing weapons to Murasaki after Murasaki loses his Minimum ability and participating in communal efforts at Cafe Nowhere. His dynamic with Honey underscores a relationship built on loyalty, guilt-driven commitment, and mutual dependence, with his development anchored in the tension between past trauma and present protective duties.