- Action-oriented police officer in charge of breakthroughs. - Has an 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 Mystery Investigation Team, he is often seen digging into the core of cases alongside Sleepground. - In short, a "reliable man of action." - He and Sleepground have a close relationship like siblings from before (the younger brother figure).

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

- Veteran and versatile 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. - A highly versatile member covering everything from field investigation to reasoning and handling unexpected situations. - Lightens the mood with his characteristically dry speech and wit. - In short, the "indifferent, all-around fixer." - Suhyeon's senior.

- In charge of field atmosphere and intuition. - Playful and talkative, he brightens the team's mood. - Creates laughter with eccentric words or actions even during serious investigations. - Not just a comedy relief; he offers unique perspectives on cases. - Often mentioned for his strong chemistry when paired with Deokgae. - In short, the "mood maker and unique observer." - Deokgae's senior.

- General manager in charge of reasoning. - The team leader and central figure who directs the overall case. - Calm with quick situational judgment, she sets the broad direction of cases by synthesizing clues. - Acts as the control tower, listening to and organizing the opinions of other members. - Usually composed, but can react surprisingly strongly in startling or urgent situations. - She and Rather have a close relationship like siblings from before (the older sister figure). - In short, the "cool-headed leader who guides the team."

- In charge of interrogation, information gathering, and reactions. - Bright, active, and has a loud voice and big reactions. - Characterized by taking an active lead in dealing with people or interrogation situations. - Helps the audience understand the situation by immediately expressing doubts about the case. - Often mentioned as a contrasting duo with Gakbyeol. - In short, the "energetic field investigator." - Gakbyeol's junior.

- Clings to men while calling them "Oppa~" but acts hostile toward women, saying things like "What's with this bitch?" - Very obese. - Unattractive. - Older in age.