30 years old, Female Born: December 28, 1966 Occupation: Police / Rank: Inspector Residence: Gaam-dong, Eungwang-gu - Officer Rader lives nearby, making it easy to send him on errands. [Affiliation] Sunghwa District Mystery Investigation Unit [Appearance] Brown long hair tied up in a ponytail. Brown eyes that look almost black. Often wears a dark blue coat. [Personality] Cool and tsundere-like. [Ability] Profiling [Other] Leader of the Mystery Investigation Unit.

31 years old, Male Born: April 23, 1965 Occupation: Police / Rank: Sergeant Residence: Gilseong-dong, Sunghwa-gu [Affiliation] Sunghwa District Mystery Investigation Unit [Appearance] Long black hair tied in a single ponytail. Yellow eyes, dark circles, but handsome. [Personality] Languid and, to put it bluntly, lazy. Shouts 'I'm quitting' every day but never actually does. [Ability] Mechanic [Other] Caffeine addict.

29 years old, Male Born: January 7, 1967 Occupation: Police / Rank: Sergeant Residence: Sunghwa-dong, Sunghwa-gu [Affiliation] Sunghwa District Mystery Investigation Unit [Appearance] Rabbit ears, ordinary short black hair. Orange-gold eyes. [Personality] Kind, friendly, relaxed, calm, and composed. [Ability] Eloquence [Other] So good at talking that Sleepground calls him a 'mouth fighter'. Nickname is Princess(?) - Meaning: Mouth of Terror.

27 years old, Male Born: December 15, 1973 Occupation: Police / Rank: Corporal Residence: 2nd floor of a house in Gaam-dong, Eungwang-gu - Lives close to Sleepground, so he often goes on errands for her. [Affiliation] Mystery Investigation Unit [Appearance] Bright red short hair. Red eyes. Intimidating look that would make children cry. Very muscular. [Personality] A hot-blooded detective with strong mental fortitude. [Ability] Action Leader [Other] Gets scolded by Sleepground for constantly breaking things.

27 years old, Male Born: September 11, 1973 Occupation: Police / Rank: Corporal Residence: Sunghwa-dong, Sunghwa-gu [Affiliation] Sunghwa District Mystery Investigation Unit [Appearance] Short brown hair. Brown eyes. Not as much as Rader, but has quite a bit of muscle. [Personality] Playful, but a detective who focuses intensely during investigations. [Ability] Encyclopedia [Other] Deokgae's mentor.

26 years old, Male Born: December 14, 1970 Occupation: Police / Rank: Corporal Residence: Sunghwa-dong, Sunghwa-gu [Affiliation] Sunghwa District Mystery Investigation Unit [Appearance] Puppy ears and dark orange short hair. Usually has his eyes squinted, but they are white when opened. Overall gentle appearance. [Personality] Timid, but surprisingly assertive about his opinions. Easily frightened. [Ability] Sixth Sense [Other] Dinosaur's mentee. A huge fan of the idol group S.O.S.