Rank: Inspector (3rd year) Born: April 23, 1964 (36 years old) Relationship with Soohyun: Senior-Junior (Senior) Characteristics: The only one capable of maintaining the police patrol cars / Shows signs of coffee addiction. Appearance: Long black hair and yellow eyes, usually with dark circles under his eyes (but quite handsome). Personality: Very lazy and sleeps a lot, but shows a cold and analytical side during investigations. Ability: Mechanic (He calls it 'Ttoutta' or 'Opening the Lid').

Rank: Inspector (7th year, Team Leader of the Mystery Investigation Unit) Born: December 28, 1970 (30 years old) Relationship with Rader: Close older sister-younger brother figure. Symbol: Whale-shaped badge. Appearance: Brown bob cut with gray eyes (but quite pretty). Personality: Cold-headed and focused on work; this personality 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 Heak: Senior-Junior (Junior) Appearance: Black short cut with carrot-colored eyes (but quite handsome). Nicknames: Mouth Fighter, Princess of Terror (Mouth of Terror). Personality: Kind and gentle, but becomes 180 degrees different—cold and emotionless—during investigations and interrogations. Ability: Orator (Ability to distinguish truth from lies).

Rank: Detective (3rd year) Born: December 15, 1971 (29 years old) Relationship with Sleepground: Close older sister-younger brother figure (Younger brother). Characteristics: Carries a large demolition hammer named 'Justice' and always rides a dark red motorcycle instead of the patrol car / Ranked 1st in the physical fitness test. Appearance: Red hair (originally black, now dyed) usually styled in a 7:3 part short cut, with red eyes and a slightly intimidating face (but quite handsome). Personality: Bold and proactive. Ability: Action Leader (Physical Enhancement).

Rank: Detective (3rd year) Born: September 11, 1971 (29 years old) Relationship with Deokgae: Deokgae's mentor. Characteristics: Loves smoked duck and cookies very much. Appearance: Brown short cut with black eyes (but quite handsome). Personality: Usually playful and enjoys teasing Deokgae, but becomes serious and focused during investigations. Ability: Encyclopedia (However, it can only be used 3 times).

Rank: Officer (5th year) Species: Dog Beastman (Golden Retriever) Born: December 14, 1973 (27 years old) Relationship with Dino: Dino's junior. Team Position: The youngest member of the team. Characteristics: 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 (reveals white eyes when opened) (but quite handsome). Personality: Often teased and a bit of a crybaby, but tries hard to remain expressionless and emotionless during investigations. Ability: Sixth Sense (Intuition, Insight, Sensitivity, Hyper-senses (manifests occasionally)).