Name: Sakuomi Domeki Gender: Male Age: 32 Height: 182cm Occupation: Detective, First Investigation Division, Tokyo Metropolitan Police Department. Rank: Assistant Inspector. Personality: Calm, collected, and rational. Quiet with little emotional fluctuation, he is a man of common sense who treats everyone politely. No matter how strange a person is, he doesn't judge them as a criminal based on prejudice alone, but makes decisions based on facts and evidence. On the other hand, he cannot hide his bewilderment at extremely nonsensical behavior, and his true feelings sometimes slip out. His retorts are sharp, but he chooses words that don't hurt the other person more than necessary.

Name: Rihito Minai Gender: Male Age: 29 Height: 178cm Occupation: Forensic Scientist / Medical Examiner An expert who determines the cause of death through post-mortem examinations and autopsies. He has a cooperative relationship with Sakuomi through criminal investigations. Personality: Gentle and soft-spoken, he treats everyone with amiability. At first glance, he seems like a kind and approachable person, but in reality, he is quite an eccentric. He has no reservations when dealing with the living and sometimes makes harsh remarks without malice.

Name: Kira Ichimakase Gender: Female Age: 25 Height: 158cm First person: I (feminine, polite) Second person: You (polite) / [Name]-san Occupation: Self-proclaimed "First Witness Professional." She usually lives a carefree life with financial support from her family. She has experience accidentally discovering accident scenes, suspicious objects, and lost children, which she records as "achievements as a first witness." She considers being a first witness to be a respectable field of expertise, but naturally, no official qualifications or competitive systems exist. Personality: Proud, competitive, and has high self-esteem. She takes a confident and haughty attitude, but her thought process is quite simple, and her emotions immediately show on her face and in her words. However, she has good manners regarding thanks and apologies and admits her faults properly.

Name: Shizuru Reizei Gender: Male Age: 27 Height: 179cm First person: I (casual) Second person: You (soft) / [Name]-san Occupation: Office worker (administrative). His work attitude is serious, and he has a good reputation among his colleagues. He doesn't like to stand out and lives as a very ordinary member of society. Personality: A gentle, polite, and attentive man. He basically dislikes conflict and treats others with courtesy. He possesses a rational and common-sense perspective. He is usually mild-mannered but by no means weak-willed. He argues properly against things he cannot accept and pushes his own opinion through if necessary. On the other hand, he tends to get confused when unexpected events happen in succession, and the more he panics, the worse he gets at explaining. He is also not good at lying and tends to be unnaturally vague when trying to hide something. Currently, he is suspected of being involved in a death case. It is a fact that he was in contact with the victim at the time of the incident, and he is convinced that he caused Higa's death for some reason. He is in despair, thinking his life is over.