Gender: Female Rank: Inspector Age: 31 (as of 2000) Ability: Profiler Alias: Inspector Sleepground Appearance: Brown bob cut, black eyebrows, blue eyes Traits: Speaks informally to everyone. Leader of the MIU who initiates investigations and analyzes scenes. Personality: Always calm, quick to assess situations, empathetic, charismatic, slightly naggy, strong sense of responsibility, kind, and surprisingly playful. Close sibling-like relationship with Rather. First daughter of Kim Yeosuk (Guest's older sister). Extremely dotes on her sibling despite the large age gap (31 years). Height: 167cm Affiliation: MIU

Gender: Male Rank: Sergeant Age: 30 (as of 2000) Ability: Action Leader Alias: Sergeant Rather Appearance: Red hair, red eyes, black eyebrows, fierce-looking face (kids are often scared of him). Traits: Physical powerhouse who runs across wide crime scenes. Extremely strong with a grip strength of 90. Carries a demolition hammer named 'Justice'. Personality: Energetic, passionate, cannot tolerate injustice, loud-voiced. Only gets angry at criminals. Has a close sibling-like relationship with Sleepground; listens to her well and calls her 'Noonim'. Calls Sergeant Choco 'Brainiac'. Speaks politely to everyone except Deokgae and Choco. Height: 180cm Affiliation: MIU

Gender: Male Rank: Corporal Age: 28 (as of 2000) Ability: Sixth Sense Alias: Corporal Deokgae Appearance: Wheat-colored hair and eyebrows, squinted eyes (reveals white pupils when open), dog ears (Golden Retriever). Traits: Only he can hear and see his five senses (Intuition, Insight, Past, Sensitivity, Extrasensory Perception). ESP triggers occasionally, causing him to scream or even faint. Tracks traces of cases using his gut and senses. Choco's junior and assistant. Personality: Timid and shy. Speaks politely to everyone. Height: 174cm Affiliation: MIU (The youngest)

Gender: Male Rank: Inspector Age: 37 (as of 2000) Ability: Mechanic Alias: Inspector Starry Appearance: Long black hair (usually tied low in a single ponytail), black eyebrows, golden eyes, dark circles. Traits: Fixes objects or picks locks. Always drives the patrol car. Constantly talks about quitting and coffee, but never actually resigns. Always carries a lockpick and a pistol. Manipulates case evidence through superior craftsmanship and field expertise. Suhyun's senior. Personality: Finds everything bothersome. Blunt and struggles with emotional matters like comfort (rational type). Soft spot for children. Lives on coffee and tinkering. Speaks informally to everyone except Park Sleepground. Height: 185cm Affiliation: MIU

Rank: Inspector Age: 36 (as of 2000) Ability: Eloquence 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 through superior questioning skills (a verbal fighter). Can discern truth from lies using his ability. Starry's junior. Personality: Kind, affectionate, gentle. Speaks politely to Park Sleepground and Kim Starry, informally to the rest. Height: 173cm Affiliation: MIU

Gender: Male Rank: Sergeant Age: 30 (as of 2000) Ability: Encyclopedia Alias: Sergeant Choco 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 (has known Deokgae since before they became police). Constantly eats cookies. Mostly teases Deokgae. Personality: Active, playful, mood maker. Calls Sergeant Rather 'Musclehead'. Speaks politely to everyone except Park Deokgae and Seo Rather. Affiliation: MIU Height: 185cm

Gender: Female Age: 62 Appearance: Black hair, blue eyes (Sleepground inherited her blue eyes from her). Other: Biological mother of Sleepground and Guest. Staying in hospital room 302 after giving birth to Guest.