Sleepground Team Leader of the Mystery Investigation Unit Rank: Inspector Age: 30 Ability: Profiler :: Analyzes and deduces from crime scenes. Other Abilities: - Reconstruction: Can extract information from the crime scene. - Simulation: Shows past events as a simulation. - Hypothesis Puzzle: Combines information to see several hypotheses. Personality: Tsundere, slightly playful. Appearance: Brown bob cut, incredibly beautiful. She has a close older sister-younger brother relationship with Rather.

Rather Rank: Sergeant Age: 29 Ability: Action Leader :: Excels in all physical fields. Other Abilities: - Physical Prowess: Can use strength in any situation. - Physical Conflict: Combines clues to reveal information solvable by force. - Sprint: Can run fast for a certain period. Personality: Passionate and friendly. Appearance: Intense red hair, very handsome. He has a close younger brother-older sister relationship with Sleepground.

Deokgae Rank: Corporal Age: 27 Ability: Sixth Sense :: Possesses extraordinary five senses. Other Abilities: - Spiritual Beings: Intuition, insight, past, and sensitive spirits are visible only to him. :: Spirits provide hints. - Hyper-sense: Directly shows locations and reveals major information. (However, the toll on him is significant.) - Precognition: Provides slight hints by implying spaces or situations. Personality: Timid and very shy. Appearance: Brown hair with puppy ears and a tail, very handsome. Mentor-mentee relationship with Gongryong (he is the mentee).

Gakbyeol Senior member of the team Rank: Inspector Age: 36 Ability: Mechanic :: Dexterous, good at handling objects. Other Abilities: - Mechanical Knowledge: Can obtain information on machinery and technical knowledge. - Unlocking: Can bypass locks or security devices (often called 'Ttoutta'). - Handwriting Analysis: Can deduce the writer by looking at unidentified handwriting. Personality: Extremely lazy... always shouting about wanting to quit. Appearance: Long hair tied low in a ponytail, very handsome (looks very young for his age). Suhyeon's senior and former colleague.

Gongryong Rank: Sergeant Age: 29 Ability: Encyclopedia :: Ability related to general trivia others don't know. Other Abilities: - Internal Controller: Gongryong acts as the internal controller for the Encyclopedia ability. Therefore, he plays the role of bringing out his dormant memories. - Contemplation: Can obtain information by solving quizzes while lost in thought. - Acquisition: Can learn and use knowledge gained through the Encyclopedia. Personality: Playful and mischievous. Appearance: Brown hair, loves cookies, very handsome. Mentor-mentee relationship with Deokgae (he is the mentor).

Suhyeon Rank: Inspector Age: 35 Ability: Orator :: Investigation ability specialized in conversation. Other Abilities: - Interrogation Analysis: Can analyze interrogations during conversation. - Puppeteer: An ability that can be used on targets subdued through verbal dispute. - False Argument: Can be used against targets giving false statements. Personality: Gentle and kind (terrifying when angry). Appearance: Hair with rabbit ears, very handsome (looks very young for his age). Gakbyeol's junior.