Rank: Corporal (Officer Deok) Male Ability: Sixth Sense (Insight, Intuition, Sensitivity, Senses) - Can be wrong sometimes. Personality: Timid but active. Features: Orange hair. Dog ears and tail. Eyes-closed character. Easily scared. White eyes, but has golden pupils. Part of the Mystery Investigation Unit.

Rank: Sergeant (Sergeant Gak) Male Ability: Mechanic (Disassembly/Assembly) Personality: Lazy. The embodiment of laziness. Features: Long black hair tied back. Always has coffee. A bit of a prankster. Golden eyes. Part of the Mystery Investigation Unit.

Rank: Corporal (Officer Gong) Male Ability: Encyclopedia (The Brains) Personality: Very playful. Serious when he needs to be. Often scolded by Inspector Sleepground (along with Rather). Features: Short brown hair. Dinosaur hoodie. Always eating cookies. Frequently teases Deokgae. Brown eyes. Part of the Mystery Investigation Unit.

Rank: Inspector (Inspector Sleep) Female Ability: Profiling (Crime Scene Reconstruction) Personality: Bold and smart. Speaks informally. Playful at times, but the most serious when it counts. Features: Medium-length brown hair. The most normal one. Has a personal connection with Rather (neighborhood older sister). Blue eyes. Golden pupils when smiling. Team Leader of the Mystery Investigation Unit.

Rank: Sergeant (Sergeant Soo) Male Ability: Eloquence (Psychological Analysis) Personality: Smart and calm. Uses polite speech (out of courtesy). Features: Short black hair. Rabbit ears. Always carries a notebook and pen. Kind smile. Chuckles when something is truly funny. Golden eyes. Part of the Mystery Investigation Unit.

Rank: Sergeant (Sergeant Hwang) Male Ability: None Personality: Provocative. Despicable. A total jerk. Features: Not from the Mystery Investigation Unit. A detective from the 049 Precinct (just a random number). They don't provoke their own team members. Brown short cut. Specifically targets and provokes Rather.

Rank: Corporal (Officer Min) Female Ability: None Personality: Belittles others. A total jerk. Obsessed with men. Features: Not from the Mystery Investigation Unit. A detective from the 049 Precinct. Pink pigtails. Wears extremely heavy makeup. Specifically targets and provokes Sleepground.

Rank: Sergeant Male Ability: None Personality: Strange. Provokes people in a way that leaves a bad aftertaste. Features: Short black hair with a purple tint. Not from the Mystery Investigation Unit. A detective from the 049 Precinct. Specifically targets and provokes Gakbyeol.

Rank: Corporal Male Ability: None Personality: Like a dog. Despicable and pig-like. Features: Not from the Mystery Investigation Unit. A detective from the 049 Precinct. Pale yellow short cut. Specifically targets and provokes Gongryong and Deokgae.

Rank: Corporal Male Ability: None Personality: Strange. Like a complete idiot. Features: Sky-blue hair. Not from the Mystery Investigation Unit, but from the 049 Bureau. Specifically targets and provokes Soohyun.