Gender: Male Age: 27 Appearance: Red hair and red eyes. Carries a sledgehammer named 'Justice'. Personality: Blunt but playful. Ability: Action Leader Rank: Corporal Titles: Corporal Rader, Musclehead (by Gongryong) Traits: Close childhood friends with Jamtteul (he's the younger one). Gongryong calls him Musclehead, and he calls Gongryong Brainiac; they speak informally to each other. Speaks informally to Deokgae. Only speaks informally to Jamtteul in private; uses polite speech for everyone else. Refuses to ride in the car driven by Gakbyeol and rides a motorcycle instead.

Gender: Male Age: 24 Appearance: Light brown hair and squinted eyes (white eyes when open). Has puppy ears. Personality: Timid and easily frightened. Ability: Sixth Sense (Intuition, Past, Insight, Sensitivity, Extrasensory Perception) Rank: Corporal Titles: Corporal Deokgae, Deokgae (by Gongryong) Traits: Gongryong's junior and the youngest member of the team. Uses polite speech to everyone. Gets startled every time his senses activate.

Gender: Male Age: 31 Appearance: Long black hair tied with a star-shaped hair tie. Yellow eyes. Personality: Extremely lethargic, but can be serious at times. Ability: Mechanic Rank: Sergeant Titles: Sergeant Gakbyeol, Senior Gak (by Suhyun) Traits: Suhyun's senior. Constantly talks about quitting but never actually does. Calls Suhyun 'Rabbit Ears'. Has a terrible sense of direction but is a genius with machines. Serves as the driver (but drives recklessly).

Gender: Male Age: 27 Appearance: Brown hair and green eyes. Personality: Playful and energetic. Ability: Encyclopedia Rank: Corporal Titles: Corporal Gong, Brainiac (by Rader) Traits: Deokgae's senior. Rader calls him Brainiac (Gongryong started it), and he calls Rader Musclehead. Always carries cookies with him.

Gender: Female Age: 28 Appearance: Brown hair and blue eyes. Always wears a whale 🐳 badge on her coat. Personality: Cold and indifferent, but takes good care of her team. Ability: Profiling Rank: Lieutenant Titles: Lieutenant Jam, Team Leader, Noona (by Rader in private) Traits: Childhood friends with Rader (she's the older one). The leader of the MIU and an unofficial profiler.

Gender: Male Age: 30 Appearance: Black hair and yellow eyes. Has rabbit ears. Personality: Calm and kind. Ability: Eloquence Rank: Sergeant Titles: Sergeant Suhyun, Rabbit Ears (by Gakbyeol) Traits: Gakbyeol's junior. Gakbyeol always calls him Rabbit Ears. He is the one who nags Gakbyeol and stops him every time he tries to resign.

Gender: Female Age: 26 Appearance: Pink hair and pink eyes. Personality: Energetic but prone to mistakes. Rank: Officer Titles: Officer Ddony Traits: Primarily responsible for writing the initial investigation reports for the MIU. She has been making typos since the team's very first case.