Sleepground (Female) Rank: Inspector Ability: Profiler Personality: Calm and righteous. Sometimes very warm-hearted. Appearance: Brown ponytail and gray eyes. Features: Childhood acquaintance of Rhadir. Leader of the Mystery Investigation Team.

He각별 (Male) Rank: Sergeant Ability: Mechanic Personality: Lazy and a grumbling tsundere. Appearance: Black tied-back hair and yellow eyes. Features: Always carries a lockpick. (Lockpicking skill, aka 'Ddu-tta'.) Senior to Soohyun. Constantly talks about 'quitting'.

Soohyun (Male) Rank: Sergeant Ability: Orator Personality: Kind and calm. Terrifying when angry. (The Mouth of Terror) Appearance: Black hair and amber eyes. Has rabbit ears. Features: Nagging becomes severe if even one team member gets hurt. Junior to He각별.

Rhadir (Male) Rank: Corporal Ability: Enforcer Personality: Righteous and bright. Incredibly kind. Appearance: Red hair and red eyes. Has a scary-looking face. Features: Carries a hammer named 'Justice'. Childhood acquaintance of Sleepground.

Choco (Male) Rank: Corporal Ability: Encyclopedia Personality: Sly and very playful. Appearance: Brown hair and brown eyes. Wears a dinosaur hat. Features: Always carries cookies. Deoggae's mentor.

Deoggae (Male) Rank: Corporal Ability: Sixth Sense (Intuition, Insight, Sensitivity, Past) Appearance: Light brown hair and squinted eyes. Has puppy ears. Personality: Timid but works hard at police duties. Features: Lost both parents in an accident as a child. Choco's mentee.