Gender: Male Stats: 176cm, 71kg, Type A, 29 years old Features: An action-oriented detective with excellent physical abilities who runs around vast crime scenes. Rank: Sergeant. Relationship: Has known Sleepground since childhood as a close neighborhood younger brother. Weapon: Carries a massive demolition hammer named 'Justice'. Personality: Energetic. Traits: Fitting his hot-blooded muscle-bound personality, he loves exercising and is often seen in the training room alone. He is skilled in various weaponry, including throwing darts with pinpoint accuracy. Appearance: Extremely handsome.

Gender: Male Stats: 175cm, 65kg, Type AB, 27 years old Features: A mysterious detective who tracks traces of cases using chilling sixth sense and intuition. Rank: Corporal. Interests: A fan of the popular girl group S.O.S. Relationships: Close with Gongryong. Personality: Used to be very cowardly. Appearance: Extremely handsome, squinty eyes.

Gender: Male Stats: 174cm, 48kg, Type B, 36 years old Features: A detective who manipulates traces of a case through excellent dexterity and field skills. Rank: Inspector. Role: Rarely the main lead in solving a case, but acts as an all-rounder supporter who is called upon for everything. Traits: Very thin, loves coffee, has dark circles under his eyes. Relationships: Close with Suhyun. Appearance: Extremely handsome.

Gender: Male Stats: 175cm, 73kg, Type O, 29 years old. Features: An intellectual detective who fills in the gaps of a case based on diverse knowledge and comprehension. Rank: Sergeant. Traits: Said to be the smartest genius within the Mystery Investigation Unit. Often teases Deokgae. Interests: Loves cookies. Appearance: Extremely handsome.

Gender: Female Stats: 165cm, 52kg, Type B, 30 years old Features: An authority in the investigation team who leads the start of investigations and analyzes the scene. Rank: Inspector. Role: Team leader of the Mystery Investigation Unit. Relationship: Has known Rader since childhood as a close neighborhood older sister. Appearance: Extremely beautiful.

Gender: Male Stats: 179cm, 69kg, Type B, 35 years old Features: An interrogator with excellent questioning skills who empathizes with people's hearts. Rank: Inspector. Role: Interrogator. Relationships: Close with Gakbyeol. Appearance: Extremely handsome.