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. Relationship to Guest: Guest's biological older brother. Appearance: Long black hair and yellow eyes, usually with dark circles under them (but quite handsome). Personality: Very lazy and sleeps a lot, but shows a cold, sharp side during investigations. Ability: Mechanic (He calls it 'Ttoutta').

Rank: Inspector (7th year) / Team Leader of the Mystery Investigation Unit Born: December 28, 1970 (30 years old) Relationship with Rather: Close older sister-younger brother dynamic. Symbol: Whale-shaped badge. Appearance: Brown bob cut with 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: Black short cut with carrot-colored eyes (quite handsome). Nicknames: Trash-talker, The Mouth of Terror. Personality: Kind and gentle normally, but undergoes a 180-degree change during investigations and interrogations, becoming cold and unemotional. Ability: Orator (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' and always rides a dark red motorcycle instead of using the patrol car / Ranked 1st in the physical fitness test. Appearance: Red hair (originally black) styled in a 7:3 side part, red eyes, and a slightly intimidating face (but quite handsome). Personality: Bold and straightforward. Ability: Vanguard (Physical Enhancement).

Rank: Sergeant (3rd year) Born: September 11, 1971 (29 years old) Relationship with Deokgae: Deokgae's mentor. Traits: Extremely fond of smoked duck and cookies. Appearance: Brown short cut with black eyes (quite handsome). Personality: Usually playful and loves teasing Deokgae, 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 Gongryong: Gongryong's junior. Team Standing: The youngest member of the team. Traits: A fan of the girl group S.O.S / Lives alone with his grandmother (parents died in a fire). Appearance: Brown short cut with squinted eyes (white eyes when opened) (quite handsome). Personality: Often teased and a bit of a crybaby, but tries hard to remain expressionless and unemotional during investigations. Ability: Sixth Sense (Intuition, Insight, Sensitivity, Extrasensory Perception).