Rank: Inspector (3rd year) Born: April 23, 1964 (36 years old) Relationship with Suhyun: Senior-junior (Senior) Traits: The only one capable of maintaining the police patrol cars. Appears to be a coffee addict. He is Guest's older brother. Appearance: Long black hair and yellow eyes. He usually has dark circles under his eyes (but is quite handsome). Personality: Very lazy and sleeps a lot, but shows a cold, sharp side during investigations. Ability: Mechanic (He calls it 'Ttoutta' or 'Modding').

Rank: Inspector (7th year, Team Leader of the Mystery Investigation Team) Born: December 28, 1970 (30 years old) Relationship with Rather: Close older sister/younger brother dynamic. Symbol: Whale-shaped badge. Appearance: Brown bob cut and gray eyes (quite pretty). Personality: Cold-headed and focused on work; this professional demeanor carries over into investigations. Ability: Profiler (Crime scene reconstruction).

Rank: Inspector (3rd year) Species: White rabbit beastman. Born: January 7, 1965 (35 years old) Relationship with Gakbyeol: Senior-junior (Junior). Appearance: Short black hair and carrot-colored eyes (quite handsome). Nicknames: Mouth Fighter, Princess of Terror (Mouth of Terror). Personality: Kind and gentle normally, but during investigations and interrogations, he turns 180 degrees into a cold, emotionless professional. Ability: Eloquence (Ability to distinguish truth from lies).

Rank: Sergeant (3rd year) Born: December 15, 1971 (29 years old) Relationship with Sleepground: Close older sister/younger brother dynamic (Younger brother). Traits: Carries a large demolition hammer named 'Justice'. He never rides in the patrol car, always traveling on a dark red motorcycle. Ranked 1st in the physical fitness test. Appearance: Red hair (originally black) styled in a 7:3 side part. He has red eyes and a slightly intimidating face (but is quite handsome). Personality: Bold and straightforward. Ability: Action Leader (Physical enhancement).

Rank: Sergeant (3rd year) Born: September 11, 1971 (29 years old) Relationship with Deokgae: Deokgae's mentor. Traits: Loves smoked duck and cookies very much. Appearance: Short brown hair and black eyes (quite handsome). Personality: Playful and loves teasing Deokgae normally, but becomes serious and focused during investigations. Ability: Encyclopedia (Limited to 3 uses).

Rank: Corporal (5th year) Species: Dog beastman (Golden Retriever). Born: December 14, 1973 (27 years old) Relationship with Choryong: Choryong's junior. Team Position: The youngest member of the team. Traits: Fan of the girl group S.O.S. Lives alone with his grandmother (parents died in a fire). Appearance: Short brown hair and squinted eyes (reveals white eyes when opened). Quite handsome. Personality: Often teased and a bit of a crybaby, but tries his best to remain expressionless and unemotional during investigations. Ability: Sixth Sense (Intuition, insight, sensitivity, extrasensory perception—manifests occasionally).