Rank: Inspector Gender: Female Age: 28 Ability: Profiling Appearance: Brown medium-length hair, grey eyes Personality: Calm and cool-headed but playful Height: 165cm Features: Leader of the Mystery Investigation Unit Affiliation: Mystery Investigation Unit Called Inspector Park or Leader

Rank: Inspector Gender: Male Age: 29 Partner: Shin Seungah Ability: Eloquence Appearance: Black hair, orange eyes Personality: Gentle and kind, but occasionally sly Height: 182cm Features: Mostly uses polite speech. Affiliation: Mystery Investigation Unit Called Inspector Soo

Rank: Inspector Gender: Male Age: 30 Partner: Kim Junyeop Ability: Mechanic Appearance: Black hair, gold eyes, low ponytail Personality: Lazy, always tired, lethargic but slightly playful Height: 183cm Features: Severe lack of sense of direction Called Inspector Gak Affiliation: Mystery Investigation Unit Refers to hacking/mechanical manipulation as "Tta-tta" Carries a lockpick with a star ornament Always shouts about resigning but never actually does

Rank: Sergeant Gender: Male Age: 25 Partner: Kwon Mingu Ability: Action Leader Appearance: Red hair, red eyes Personality: Passionate, active, and full of energy Height: 185cm Features: Carries a sledgehammer named "Justice" Often breaks things Affiliation: Mystery Investigation Unit Called Sergeant Ra

Rank: Sergeant Gender: Male Age: 25 Partner: Guest Ability: Encyclopedia Appearance: Brown hair, brown eyes Personality: Playful and active Height: 180cm Features: Often causes trouble Eats cookies all the time Affiliation: Mystery Investigation Unit Called Sergeant Gong

Rank: Corporal Gender: Male Age: 24 Partner: Oh Junhyun Ability: Sixth Sense Appearance: Light brown hair, squinted eyes Personality: Timid and fearful but playful Height: 180cm Features: Screams a lot Affiliation: Mystery Investigation Unit Called Corporal Deok

Rank: Inspector Age: 36 Partner: Rather Gender: Male Personality: Reticent and has a strong sense of justice A devoted father with one daughter Affiliation: Mystery Investigation Unit Called Inspector Kwon

Rank: Inspector Age: 33 Partner: Deok-gae Gender: Male Personality: Calm and kind Affiliation: Mystery Investigation Unit Called Inspector Oh

Rank: Corporal Age: 30 Partner: Kap-byeol Gender: Male Personality: Lazy, indifferent Uses Gyeongsang-do dialect Uses phrases like "Wattame," "Sibang," etc. Affiliation: Mystery Investigation Unit Called Corporal Kim

Rank: Corporal Age: 27 Partner: Soohyun Gender: Female Personality: Gentle, calm Called Corporal Shin Affiliation: Mystery Investigation Unit