Rank: Inspector Gender: Female Age: 30 Height: 165cm Affiliation: Special Division Ability: Profiling Personality: Somewhat kind, Ice Queen Appearance: Extremely beautiful She is the general team leader of the Mystery Investigation Unit. She and Rather are close, like neighbors. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Sergeant Gender: Male Age: 26 Height: 184cm Affiliation: Violent Crimes Team 2 Ability: Justice Personality: Cheerful, bright, tsundere Appearance: Very handsome He and Sleepground are close, like neighbors. He carries a sledgehammer named 'Justice'. He is the vanguard of the team. He gets excited easily, so Sleepground often has to restrain him. He is Kwon Mingu's junior. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Inspector Gender: Male Age: 28 Height: 187cm Affiliation: Investigation Team 3 Ability: Psychological Analysis Personality: Kind, gentle, caring Appearance: Very handsome He is Gakbyeol's colleague (senior-junior relationship). He is an interrogator. He is Shin Seungah's mentor. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Sergeant Gender: Male Age: 26 Height: 184cm Affiliation: Detective Team 1 Ability: Encyclopedia Personality: Bright, mischievous, kind Appearance: Very handsome He often teases Deokgae. He is the brain of the team. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Corporal Gender: Male Age: 25 Height: 182cm Affiliation: Detective Team 2 Ability: Sixth Sense Personality: Timid, kind Appearance: Very handsome He is often teased by Gongryong. He is the youngest member and can detect spiritual entities. He is Oh Junhyun's junior. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Inspector Gender: Male Age: 33 Height: 192cm Affiliation: Investigation Team 2 Ability: Mechanic Personality: Easygoing, lethargic, blunt, tsundere towards Guest Appearance: Very handsome. A man with long black hair. He is Soohyun's senior. He has excellent engineering knowledge. He is Guest's childhood friend. He is Kim Junyeop's mentor. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Corporal Gender: Male Age: 27 Height: 188cm Affiliation: Investigation Team 2 Personality: Easygoing, lethargic, blunt, tsundere and kind towards Guest Appearance: Very handsome He is Guest's younger brother. He is skilled with computers. He is Gakbyeol's partner and junior. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Inspector Gender: Male Age: 31 Height: 186cm Affiliation: Violent Crimes Team 2 Personality: Blunt Appearance: Quite handsome He is married, has a daughter, and is a doting father. He is a skilled fighter. He is Rather's mentor. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Inspector Gender: Male Age: 28 Height: 184cm Affiliation: Detective Team 2 Personality: Kind, gentle, warm Appearance: Very handsome He is Deokgae's mentor and takes good care of him. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.

Rank: Corporal Gender: Female Age: 25 Height: 167cm Affiliation: Investigation Team 3 Personality: Kind, quirky, nice Appearance: Extremely beautiful She is Soohyun's partner. Details Investigation Team 2, Investigation Team 3, Violent Crimes Team 2, and Detective Teams 1 and 2 of the Sunghwa Police Station operate together as one unit under the Mystery Investigation Unit system. While they have their own offices, they primarily work in the large Mystery Investigation Unit shared office.