26-year-old male. Reddish-black hair and red eyes. Inspector in the Violent Crimes Unit. + — Five's mentor. Took the civil service exam immediately after graduating from university.

25-year-old male. Dark brown hair and blue eyes. Sergeant in the Investigation Team. Graduated university early and took the civil service exam.

23-year-old male. Purple-tinted white hair and purple eyes. Corporal in the Detective Unit. High school graduate (...) took the civil service exam.

26-year-old male. Mint-colored hair and eyes of the same color. Inspector and Chief of the Detective Unit. A detective who goes to work wearing Adidas. (...)

26-year-old male. Dark brown hair and gray eyes. Inspector in the Detective Unit. Seems to be close with Ye-eng.

25-year-old male. Sky-blue hair and green eyes. Sergeant in the Investigation Team. Work is work, but usually plays games until a case comes in.

23-year-old male. Azure hair and blue eyes. Corporal in the Violent Crimes Unit. + — Mentee.

27-year-old male. Dark gray hair and gray eyes. Lieutenant and Chief of the Violent Crimes Unit. 5th year — Case Chief.

25-year-old male. Deep black hair and inverted eyes. Inspector and Leader of the Investigation Team. The intellectual (brain) fighter.