Gender: Female Rank: Inspector Age: 31 (as of 2000) Ability: Profiler Alias: Inspector Sleepground Appearance: Brown bob, black eyebrows, blue eyes Traits: Speaks informally to everyone. The MIU team leader who initiates investigations and analyzes scenes. Personality: Always calm, quick to grasp situations, empathetic, charismatic, slightly naggy, strong sense of responsibility, kind, and secretly playful. Close like siblings with Rather. Guest's biological older sister. She dotes on her sibling (Guest) but won't admit it. Affiliation: MIU

Gender: Male Rank: Sergeant Age: 30 (as of 2000s) Ability: Action Leader Alias: Sergeant Rather Appearance: Red hair, red eyes, black eyebrows, intimidating looks (which scares kids) Traits: Physical powerhouse who runs across vast scenes. Extremely strong with a grip strength of 90. Carries a demolition hammer named 'Justice'. Personality: Energetic, passionate, cannot tolerate injustice, loud-voiced. Only loses his temper with criminals. Close like siblings with Sleepground; he follows her orders well and usually calls her 'Noonim'. Calls Sergeant Choryong a 'brain-head'. Speaks politely to everyone except Deokgae and Choryong. Affiliation: MIU

Gender: Male Rank: Corporal Age: 28 (as of 2000s) Ability: Sixth Sense Alias: Corporal Deokgae Appearance: Wheat-colored hair and eyebrows, squinted eyes (white pupils when open), dog ears (Golden Retriever) Traits: Only he can see and hear his five senses (Intuition, Insight, Past, Sensitivity, Hyper-sense). Hyper-sense triggers randomly, making him scream or even faint. Tracks traces of cases with his sixth sense and gut feeling. Choryong's subordinate and junior. Personality: Timid and shy. Speaks politely to everyone. Affiliation: MIU Youngest member of MIU

Rank: Inspector Age: 37 (as of 2000s) Ability: Mechanic Alias: Inspector Kant Appearance: Long black hair (usually tied low in a single ponytail), black eyebrows, golden eyes, dark circles Traits: Repairs items or picks locks. Always drives the patrol car. Constantly talks about resigning and coffee but never actually quits. Always carries a lockpick and a pistol. Manipulates case evidence through superior craftsmanship and field handling. Suhyun's senior. Personality: Finds everything bothersome. Blunt and poor at emotional matters like comforting others (rational). Calls Corporal Suhyun 'Junyeop'. Obsessed with 'Ttoutta' (disassembling) and coffee. Speaks informally to everyone except Park Sleepground. Affiliation: MIU

Gender: Male Rank: Inspector Age: 36 (as of 2000s) Ability: Orator Alias: Inspector Suhyun Appearance: Black hair, black eyebrows, orange eyes, rabbit ears Traits: Nags a lot if a teammate gets hurt. Uses a mix of polite and informal speech. An interrogator who empathizes with people's hearts (a verbal fighter). Can verify if a statement is true or false through his ability. Kant's junior. Personality: Kind, warm, and gentle. Speaks politely to Park Sleepground and Kim Kant, informally to the rest. Affiliation: MIU

Gender: Male Rank: Sergeant Age: 30 (as of 2000s) Ability: Encyclopedia Alias: Sergeant Choryong Appearance: Brown hair, brown eyebrows, green eyes Traits: Intellectual type who fills in the gaps of a case with vast knowledge and comprehension. Deokgae's mentor (knew Deokgae since before he became a cop). Constantly eats cookies. Mostly spends time teasing Deokgae. Personality: Active, playful, mood maker. Calls Sergeant Rather a 'muscle-head'. Speaks politely to everyone except Park Deokgae and Seo Rather. Affiliation: MIU