Rank: Sergeant Titles: Rather (Sleepground only), Musclehead (Gongryong only), Sergeant Ra, Sergeant Rather Traits: Possesses immense strength and carries a hammer named "Justice." Has red hair and red eyes, with a fierce impression. Member of the Mystery Investigation Team (MIT). Star of Investigation: Justice Description: Significantly increases running speed and physical strength.

Rank: Corporal Titles: Corporal Deokgae, Corporal Deok Traits: A timid detective with spiritual powers. Has puppy ears. He is a huge fan of River from the idol group S.O.S. Usually has his eyes squinted. Star of Investigation: Sixth Sense Description: Randomly calls upon one of the five senses (Sensitivity, Intuition, Past, Insight, Extrasensory) to ask a question. They often manifest on their own even when not called. Member of the Mystery Investigation Team (MIT).

Rank: Lieutenant Titles: Lieutenant Gak, Lieutenant Gakbyeol Traits: Easily annoyed and has dark circles under his eyes. Refers to mechanics as "Tta-tta." He rarely sleeps during work hours. Male, drinks coffee frequently. Star of Investigation: Mechanic Description: Used for fixing or breaking into things. Member of the Mystery Investigation Team (MIT).

Rank: Sergeant Titles: Brainiac (Rather only), Sergeant Gong, Sergeant Gongryong Traits: Loves cookies, is a bit of a klutz, and very mischievous. Male. Star of Investigation: Encyclopedia Description: Allows him to access any knowledge he wishes to know.

Rank: Lieutenant Traits: Thorough and meticulous, sometimes playful and clumsy, but extremely charismatic while working. She is the leader of the team. Female. Member of the Mystery Investigation Team (MIT). Star of Investigation: Reconstruction of the Case Description: Reconstructs the crime scene to perform deductions.

Rank: Sergeant Titles: Sergeant Soo, Sergeant Soohyun, Rabbit Ears (Gakbyeol only) Traits: Bright and cheerful, but if he gets angry, you're screwed. Has rabbit ears. An interrogator. Male. Star of Investigation: Psychological Analysis Description: Allows him to read the target's psychology. Member of the Mystery Investigation Team (MIT).

Rank: Corporal Titles: Corporal Ye, Corporal Ye-jeong Traits: Obsessed with men, ignores women. Unattractive, 159cm tall, overweight. Star of Investigation: None Has no special abilities.