Lead medical examiner for the Misumi team. A forensic pathologist with approximately 1,500 autopsies performed. After honing her skills as an associate professor in a university forensic medicine department, she joined the UDI Lab four months ago. Due to her rational nature, she prefers to navigate trouble with intellect and a smile rather than useless conflict, hoping everyone can live happily... though reality is harsh. Having lost her family in a forced murder-suicide, she fiercely opposes any threat to a person's "right to live." She believes there is no such thing as a beautiful death and that once you die, it's the end. Bright, warm, funny, and friendly. Female.

Lead medical examiner for the Nakado team. A forensic pathologist with approximately 3,000 autopsies performed. He has been at the UDI Lab for a year, but due to his terrible attitude and foul mouth, the clinical laboratory technicians paired with him quit immediately, leaving him without even a recorder. His sense of ethics is broken and he will use any means to achieve his goals, leading to frequent clashes with Mikoto. Eight years ago, while at the Nichisho University forensic medicine department, he performed the autopsy on his girlfriend, Yukiko, who was murdered by an unknown assailant. The killer has never been caught, and he works at UDI—where information on unnatural deaths nationwide gathers—to find a body with a "red goldfish" mark in its mouth, just like Yukiko's. Furthermore, he pays the undertaker Kibayashi to search for bodies with that mark. Male.

A medical student and part-time recorder for the Misumi team. A newcomer hired for the job. The third son of a family of doctors, he entered a third-rate medical school after failing entrance exams three times, but remains unable to find passion for the field. Male.

Clinical laboratory technician for the Misumi team. A graduate of the faculty of pharmaceutical sciences. She has been with the UDI Lab since its founding, having previously worked at the Medical Examiner's Office. She prioritizes her private life over work. Female.

The director of the UDI Lab, though because it is a small organization, he handles various menial tasks himself. Male.

Member of the 4th Mobile Investigative Unit (4MIU). A "wild idiot" with top-tier mobility and athletic reflexes. He has a sharp nose for trouble, though it's unclear if he's smelling actual odors or just the atmosphere. Despite being new to mobile investigation and not knowing left from right, he's starting to feel it's his calling, but he tends to act before thinking, making him dangerous without Shima. Shima's partner. Male.

Member of the 4th Mobile Investigative Unit (4MIU). Formerly of the First Investigation Division, but transferred due to certain circumstances. After a stint at a driver's license testing center and a local precinct, he was called back by Kikyo when 4MIU was established. He has experience in mobile investigation and is deeply trusted by Kikyo and Jinba, but he trusts neither himself nor others. He possesses excellent observation and social skills, always thinking ahead to find the logic in a situation, yet he is constantly jerked around by Ibuki. Ibuki's partner. Male.

Captain of the 4th Mobile Investigative Unit. Appointed captain after serving as a police station chief. She is an old acquaintance of Jinba and was in the same unit as Shima during their time in the First Investigation Division. She proposed the four-unit system for the Mobile Investigative Unit and established 4MIU as a backup unit, taking responsibility for it. She has a sharp tongue but a big heart. Female.

Member of the 4th Mobile Investigative Unit. The son of the Commissioner General of the National Police Agency and a career-track rookie himself, he is confident and looks down on others. Male.

Member of the 4th Mobile Investigative Unit. A veteran. His physical strength is unmatched, though he has recently begun to feel his age. Male.