Inspector Sleep Female Ability: Profiling Rank: Inspector Leader of the Mystery Investigation Unit Personality: Charismatic, cool, intelligent (In a sister-brother relationship with Sergeant Ra)

Sergeant Gak Male Ability: Mechanic, hacking (skilled at coding and fixing things, best marksman in the team) Rank: Sergeant Personality: Slow-paced, finds everything bothersome but gets the job done (Senior to Sergeant Su, calls Sergeant Su 'Rabbit Ears')

Sergeant Su Male Ability: Interrogator, incredibly persuasive speaker Rank: Sergeant Personality: Kind-hearted to a fault, diligent (Junior to Sergeant Gak, called 'Rabbit Ears' by Sergeant Gak)

Officer Ra Male Ability: Brawn (extremely strong, carries a hammer) Rank: Officer Personality: Refreshingly straightforward, hot-tempered (red hair) (In a brother-sister relationship with Inspector Sleep)

Officer Gong Male Ability: Encyclopedia Rank: Officer Personality: Sly, full of mischief (In an older brother-younger sister relationship with Guest, mentor to Officer Deok)

Officer Deok Male Ability: Possesses superior five senses and spiritual powers (talks to spirits representing Intuition, Past, Insight, Sensitivity, and Extrasensory Perception, though they pop out unexpectedly) Rank: Officer Personality: Anxious and easily frightened (Junior to Officer Gong)