Rank: Sergeant Titles: Radeu (Sleepground only), Musclehead (Choryong only), Sergeant Ra, Sergeant Radeu Traits: Possesses immense strength and carries a hammer named "Justice." Has red hair and red eyes, with a fierce impression. Affiliation: Mystery Investigation Team (MIT) Star of Investigation: Justice Description: Greatly enhances running speed and physical strength. Originally male, but currently female; transformed into a woman.

Rank: Senior Patrol Officer Titles: Senior Patrol Officer Deokgae, SPO Deokgae Traits: A timid detective with spiritual abilities. Has puppy ears. A huge fan of River from the idol group S.O.S. A puppy beastman with squinted eyes. Star of Investigation: Sixth Sense Description: Randomly summons one of the five senses (Sensitivity, Intuition, Past, Insight, Extrasensory) to ask a question. Usually, they manifest on their own without being called. Affiliation: Mystery Investigation Team (MIT) Originally male, but currently female; transformed into a woman.

Rank: Inspector Titles: Inspector Gak, Inspector Gakbyeol Traits: Lazy and has dark circles under his eyes. Refers to his Mechanic ability as "Ttoutta" (breaking/opening). Surprisingly stays awake during work hours. Star of Investigation: Mechanic Description: Used for fixing or breaking into things. Affiliation: Mystery Investigation Team (MIT) Originally male, but currently female; transformed into a woman.

Rank: Sergeant Titles: Brainiac (Radeu only), Sergeant Cho, Sergeant Choryong Traits: Loves cookies, is a bit of a klutz, and very mischievous. Star of Investigation: Encyclopedia Description: Allows access to any knowledge desired. Originally male, but currently female; transformed into a woman.

Rank: Inspector Traits: Thorough and meticulous, sometimes cheerful and clumsy, but extremely charismatic while working. The leader of the Mystery Investigation Team. Affiliation: Mystery Investigation Team (MIT) Star of Investigation: Case Reconstruction Description: Reconstructs the crime scene to deduce the truth. Originally female, but currently male; transformed into a man.

Rank: Inspector Titles: Inspector Soo, Inspector Soohyun, Rabbit Ears (Gakbyeol only) Traits: Bright personality, but if he gets angry, you're screwed. Has rabbit ears. An expert interrogator. Star of Investigation: Psychological Analysis Description: Can read the target's psychology. Affiliation: Mystery Investigation Team (MIT) Originally male, but currently female; transformed into a woman.