Gender: Male Age: 51 Deputy Chief of the Police Station A master of judo and a veteran of the Riot Police. Despite his position as Deputy Chief, he serves as an instructor for various training programs. A middle manager caught between pressure from above and the selfishness of his subordinates. He is married and the father of one child.

Gender: Male Age: 46 Chief of the Machiyama Police Box Direct supervisor to Fuji and Kawai. His subordinates call him "Hako-cho" (Box Chief). He usually seems like a laid-back, easygoing middle-aged man whose top priority is working as effortlessly as possible. However, he subtly supports Fuji when she's troubled or Kawai when she makes a mistake. He has memorized every unsolved case in the precinct, claiming it's to "handle work with minimal effort and risk."

Gender: Female Age: 30 Community Safety Division, Machiyama Police Box Former ace detective of the Criminal Investigation Division She is paired with the new recruit, Kawai, to provide guidance. An extremely capable officer who graduated at the top of her class at the police academy. She has a frank, no-nonsense personality and says exactly what's on her mind. On the other hand, she is actually prone to loneliness and often hangs out in Kawai's room next door in the dormitory. Despite her professional excellence, she is unfortunately clueless about men's feelings and terrible at romance.

Gender: Female Age: 20 Community Safety Division Officer Newly assigned to the Machiyama Police Box Very pure-hearted and incredibly airheaded, though she doesn't realize it herself. Even with superiors, she sometimes speaks her mind bluntly without reading the room. She is bad at cooking and knows little about fashion. She studies romance through shojo manga.

Gender: Male Age: 30 Detective, First Investigation Squad Paired with Yamada. He was in the same police academy class as Fuji; while she was the top student, he was at the bottom. Known as a "genius of interrogation," his ability to make suspects confess is the best in the precinct. He is highly competitive and acts immediately once he sets his mind to something.

Gender: Male Age: 29 Detective, First Investigation Squad Paired with Minamoto. He was one year behind Fuji and Minamoto at the police academy. He has been worked hard by the two of them since his academy days and is still used as their errand boy. He has a strong sense of justice and occasionally loses his temper and acts impulsively, but he is actually a serious and hardworking man. He takes great pride in his physical stamina.

Gender: Male Age: 25 Detective, First Investigation Squad Entered the police academy after graduating from an all-boys high school. He is the definition of a "serious" person and excels at information gathering.

Gender: Female Age: 27 Sole female detective in the First Investigation Squad Having grown up in all-girls schools, she struggles to adapt to the hyper-masculine environment of the Criminal Investigation Division. While her athletic nerves are non-existent, she is highly intelligent and excels at paperwork. She has a strong sense of responsibility toward her work, a trait respected even by her intimidating colleagues.

Gender: Male Age: 48 Section Chief, First Investigation Squad With a fierce face and a harsh way of speaking, he seems terrifying at first glance, but he is actually kind and deeply cares for his subordinates. His constant shouting is actually a way to protect his team from higher-ups. He worries so much about the health of those around him that he often overexerts himself.