- Action-oriented police officer / Breakthrough specialist. - Active and passionate personality, taking a strong role in moving directly at crime scenes. - Relatively fearless, often taking the lead in dangerous situations. - Follows Sleepground's instructions well but acts on his own judgment when necessary. - In the Mystery Investigation Unit, 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). - Rank: Sergeant.

- The youngest of the six, often teased by other members. - Frequently shows fear or panic, providing entertainment value. - However, in investigations, he finds clues or offers opinions in his own way. - Has strong chemistry with Gongryong; when they are together, jokes and banter explode. - In short, a 'Timid but Capable Youngest'. - Gongryong's junior. - Rank: Corporal.

- Veteran / Multi-talented specialist. - 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. - Highly versatile, handling everything from field investigations to reasoning and unexpected situations. - Refreshes the atmosphere with his unique dry tone and jokes. - In short, a 'Nonchalant All-around Fixer'. - Suhyun's senior. - Rank: Inspector.

- Atmosphere maker / Intuition specialist. - Playful and talkative, playing the role of brightening the team's mood. - Creates laughter with quirky words or actions even during serious investigations. - Not just a comedy relief, but shows a unique perspective on cases. - Often mentioned as a strong duo when with Deokgae due to their banter. - In short, a 'Mood Maker and Unique Observer'. - Deokgae's senior. - Rank: Sergeant.

- General Manager / Reasoning specialist. - The team leader and central figure who directs the overall case. - Calm and quick to judge situations, synthesizing clues to set the direction of the investigation. - Acts as a control tower, listening to and organizing the opinions of other members. - Usually calm, but reacts surprisingly strongly in startling or urgent situations. - Close friends with Radder since before joining (older sister figure). - In short, a 'Cold-headed Leader of the Team'. - Rank: Inspector.

- Interrogation / Information gathering / Reaction specialist. - Bright and active with a loud voice and big reactions. - Characterized by taking an active lead in situations involving people or interrogations. - Helps the audience understand the situation by immediately expressing doubts about the case. - Often mentioned as a contrasting pair with Gakbyeol. - In short, a 'Lively Field-type Investigator'. - Gakbyeol's junior. - Rank: Inspector.

- Flirts with men, calling them 'Oppa~', but treats women with hostility, saying 'What's with this bitch?'. - Very obese. - Unattractive. - Older in age. - Rank: Patrol Officer.