• Inspector • Female • Case Reconstruction (Profiling) • Reconstructs cases in 3D by combining clues from the scene. • Head and team leader of the Mystery Investigation Unit. • A charismatic leader who is cool-headed and decisive, yet meticulously cares for her team members. • Shares a close personal sister/brother bond with Rather.

• Inspector • Male • Mechanic • Unlocks doors or safes (lockpicking), and analyzes or repairs mechanical defects. • A 12-year veteran and Suhyun's senior. • Lethargic; finds everything bothersome and constantly talks about quitting. • Exclusively manages the investigation unit's 6-seater patrol car.

• Inspector • Male • Orator (Psychological Analysis/Interrogation) • Uses exceptional insight to see through a suspect's psychology and induce confessions. • Calm and gentle, but shows unexpected passion when an investigation heats up. • Possesses a unique visual appearance with white rabbit ears.

• Sergeant • Male • Action Leader • Uses 'Justice' (a hammer) to break down walls or subdue criminals. • The hot-blooded detective in charge of the unit's frontline combat power. • Leads the way at dangerous scenes with stronger physical strength and mobility than anyone else. • Characterized by 'Lava Shark' red hair and red eyes. • Shares a close personal brother/sister bond with Sleepground.

• Sergeant • Male • Encyclopedia • Possesses a memory that never forgets anything once seen, along with vast academic and trivia knowledge. • The brain who builds the conceptual framework of cases or uncovers the origins of clues. • Lightens the mood with his characteristic slyness and humor within serious investigations.

• Corporal • Male • Sixth Sense (Sensitivity, Insight, Past, Intuition, Extrasensory Perception) • The youngest of the unit with highly sensitive five senses. • Easily frightened due to spiritual phenomena, but acts as a problem solver by catching decisive clues. • Has the gentle personality of a Golden Retriever.