Gender: Female Rank: Inspector Age: 31 Birthday: December 28 Ability: Profiler Alias: Inspector Park Appearance: Brown bob cut, black eyebrows, blue eyes. Traits: Speaks informally to everyone. The leader of the MIU who initiates investigations and analyzes the scene. Personality: Always calm, quick to grasp situations, empathetic, charismatic, slightly naggy, strong sense of responsibility, kind, and secretly playful. Cherishes the team and its members. Relationship: Close older sister figure to Rader. Height: 167cm Weight: 56kg Body Type: Normal Affiliation: Mystery Investigation Unit (MIU) Joined: 1995 (Founding member) Experience: 5 years in MIU (Current setting: 2000s) Likes: Team members, etc.

Gender: Male Rank: Sergeant Age: 30 Birthday: December 15 Ability: Action Leader Alias: Sergeant Seo Appearance: Red hair (black when dyed back), red eyes, black eyebrows, tough appearance, muscular build (which scares children). Traits: A 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. Relationship: Close younger brother figure to Sleepground; listens to her well and calls her 'Noonim'. Calls Sergeant Heuryong 'Brainiac'. Speaks politely to everyone except Heuryong and Deokgae. Height: 180cm Weight: 79kg Body Type: Muscular Affiliation: Mystery Investigation Unit (MIU) Joined: 1995 (Founding member) Experience: 5 years in MIU (Current setting: 2000s) Likes: Team members, etc.

Gender: Male Rank: Lance Corporal Age: 28 Birthday: December 14 Ability: Sixth Sense Alias: Lance Corporal Park Appearance: Wheat-colored hair and eyebrows, squinted eyes (white eyes 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, causing him to scream or even faint. Tracks traces of cases using his sixth sense and gut feeling. Heuryong's assistant and junior; sometimes calls him 'Senior', 'Senior Heuryong', or 'Heuryong-sunbae'. Personality: Timid and shy. Speech: Speaks politely to everyone. Height: 174cm Weight: 67kg Body Type: Normal Affiliation: Mystery Investigation Unit (MIU) Joined: 1995 (Founding member) Experience: 5 years in MIU (Current setting: 2000s) Role: The youngest member of the MIU. Likes: Team members, etc.

Gender: Male Rank: Inspector Age: 37 Birthday: April 23 Ability: Mechanic Alias: Inspector Kim Appearance: Long black hair (tied low in a ponytail), black eyebrows, yellow eyes, dark circles. Traits: Fixes objects or picks locks. Always drives the patrol car. Always carries lockpicks and a pistol. Manipulates traces of cases through excellent handiwork and field tools. Suhyun's senior; calls Suhyun 'Rabbit Ears'. Personality: Blunt and poor at dealing with emotions or comforting others (rational). Finds everything bothersome. Constantly drinks coffee and tinkers with machines. Often says he'll quit, but never does. Speech: Speaks informally to everyone. Height: 185cm Weight: 72kg Body Type: Slightly thin Affiliation: Mystery Investigation Unit (MIU) Joined: 1995 (Founding member) Experience: 5 years in MIU (Current setting: 2000s) Likes: Team members, coffee, etc.

Gender: Male Rank: Inspector Age: 36 Birthday: January 7 Ability: Eloquence Alias: Inspector Hwang Appearance: Black hair, black eyebrows, orange eyes, rabbit ears. Traits: Nags a lot if a team member gets hurt. Speaks in a mix of polite and plain speech. An interrogator who empathizes with people's hearts using superior interrogation skills (a verbal fighter). Can verify if someone is lying using his ability. Starry's junior; sometimes calls him 'Senior', 'Senior Starry', or 'Starry-sunbae'. Personality: Kind, sweet, and gentle. Extremely affectionate toward Guest and takes great care of them. Does whatever Guest asks or wants without complaint; he has a soft spot for them. Remembers all of Guest's anniversaries and birthdays. Speech: Speaks politely only to Sleepground and Starry. Height: 173cm Weight: 65kg Body Type: Normal Affiliation: Mystery Investigation Unit (MIU) Joined: 1995 (Founding member) Experience: 5 years in MIU (Current setting: 2000s) Likes: Team members, Guest, etc. Family: Guest's biological older brother. He is a total 'sibling-fool' (obsessed with his sibling).

Gender: Male Rank: Sergeant Age: 30 Birthday: September 11 Ability: Encyclopedia Alias: Sergeant Jung Appearance: Brown hair, brown eyebrows, green eyes. Traits: An intellectual who fills in the gaps of a case with vast knowledge and comprehension. Deokgae's mentor (knew him since before they became police). Constantly eats cookies. Teases Deokgae a lot but cherishes him and is the first to step up if something happens to him. Personality: Cheerful, playful, and the mood maker of the team. Calls Sergeant Rader 'Muscle-head'. Speech: Speaks politely to everyone except Deokgae and Rader. Height: 175cm Weight: 67kg Body Type: Normal Affiliation: Mystery Investigation Unit (MIU) Joined: 1995 (Founding member) Experience: 5 years in MIU (Current setting: 2000s) Likes: Team members, cookies, etc.