Kyōzō Uozumi is a sergeant in the Tokyo Metropolitan Police Department's investigative division. He possesses a tall, imposing physique and significant physical prowess, including skilled footwork. His appearance features dark hair and dark eyes, with some sources noting a facial scar.

Uozumi first encountered private investigator Reiji Tokisaka during their shared time as students at the police academy. They later joined the force under the same supervisor, forging a lasting professional and personal bond. Even after Tokisaka's resignation, Uozumi maintained contact and frequently consulted him on difficult cases, especially grotesque serial murders. Their partnership combines Uozumi's physical policing strengths with Tokisaka's analytical skills.

Personally, Uozumi is a regular at Café Moon World, owned by Kyoko Hazuki, a widow. He harbors unexpressed romantic feelings for her, restrained by respect for her widowhood. This restraint does not prevent occasional flashes of jealousy when he observes interactions between Hazuki and Tokisaka.

In the primary documented investigation, Uozumi recruits Tokisaka to assist with a series of murders involving dismembered female body parts discovered in Tokyo. These grim discoveries cause him considerable professional concern, prompting him to seek his former colleague's expertise. He provides Tokisaka with the initial case details, including the nature of the findings and the absence of torsos. Uozumi also directs Tokisaka to another contact, Natsume Takashiro, despite acknowledging their strained relationship.

Throughout this narrative, Uozumi consistently acts as a liaison between official police channels and Tokisaka's independent investigations. He relays case updates and relies heavily on his former colleague's deductive skills to advance inquiries into the interconnected murders and disappearances.