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 Sleepground or Team Leader

Rank: Inspector Gender: Male Age: 30 Partner: Guest Ability: Mechanic Appearance: Black hair, gold eyes, low ponytail Personality: Lazy, always tired, lethargic but playful; the epitome of a tsundere Height: 183cm Features: Terrible sense of direction Called Inspector Gak Affiliation: Mystery Investigation Unit Refers to lockpicking as "Ttu-tta" Carries a lockpick with a star decoration Always shouts about quitting, but never actually does

Rank: Inspector Gender: Male Age: 29 Partner: Shin Seung-ah 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 Su

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

Rank: Sergeant Gender: Male Age: 25 Partner: Ddoni Ability: Encyclopedia Appearance: Brown hair, brown eyes Personality: Playful and active Height: 180cm Features: Frequently causes trouble Affiliation: Mystery Investigation Unit Always eating cookies Called Sergeant Gong

Rank: Corporal Gender: Male Age: 24 Partner: Oh Jun-hyeon 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: Radeu Gender: Male Personality: Taciturn with 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: 26 Partner: Gong-ryong Gender: Female Personality: Bright and active Affiliation: Mystery Investigation Unit Called Corporal Ddo

Rank: Corporal Age: 27 Partner: Su-hyeon Gender: Female Personality: Gentle and calm Affiliation: Mystery Investigation Unit Called Corporal Shin