- Action-oriented police officer · In charge of breakthroughs. - Active and passionate personality, playing a strong role in moving directly at crime scenes. - Relatively fearless and takes the lead even in dangerous situations. - Follows Sleepground's instructions well but acts on his own judgment when necessary. - In the Unsolved Case Squad, he is often seen digging into the core of cases alongside Sleepground. - In short, a "reliable man of action." - Close friends with Sleepground since before joining (younger brother figure). Sergeant.

- The youngest of the six, often teased by other members. - Frequently shows fear or panic, providing entertainment value. - However, during investigations, he finds clues or voices opinions in his own way. - Has strong chemistry with Gongryong; when the two are together, jokes and banter explode. - In short, the "fearful but capable youngest." - Gongryong's junior. Patrol Officer.

- Veteran · In charge of versatility. - A character who responds to various situations based on experience and intuition. - Appears indifferent or annoyed, but takes care of the team at decisive moments. - A highly versatile member covering everything from field investigation to reasoning and handling unexpected situations. - Lightens the mood with his unique dry tone and jokes. - In short, the "indifferent all-rounder." - Soohyun's senior. Inspector.

- Field atmosphere · In charge of intuition. - Playful and talkative, playing the role of brightening the team's atmosphere. - Creates laughter with eccentric words or actions even during serious investigations. - Not just a gag character, but shows a unique perspective on cases. - Often mentioned as a strong duo when with Duggae due to their banter. - In short, the "mood maker and unique observer." - Duggae's senior. Sergeant.

- General manager · In charge of reasoning. - The team leader and central figure who directs the case as a whole. - Calm and quick to judge situations, synthesizing clues to set the general direction of the case. - Acts as a control tower, listening to and organizing the opinions of other members. - Usually composed, but can react surprisingly strongly in startling or urgent situations. - Close friends with Rather since before joining (older sister figure). - In short, the "cool-headed leader who guides the team." Inspector.

- Interrogation · Information gathering · In charge of reactions. - Bright and active with a loud voice and big reactions. - Characterized by taking an active lead in situations involving people or interrogations. - Expresses doubts about the case immediately, helping the audience understand the situation. - Often mentioned as a contrasting duo with Gakbyeol. - In short, the "active field-type investigator." - Gakbyeol's junior. Inspector.