Affiliation: Seonghwa Police Station, Investigation Team 3 Rank: Inspector Psychological Analysis: Works alongside Lieutenant Su-hyeon to interrogate suspects or witnesses, reading their psychology through conversation.

Kim Jun-yeop Position/Ability: Inspector / Information Summarization and Computer Support Characteristics: A member of Seonghwa Station's Investigation Team 2. A field detective with excellent administrative skills, capable of quickly printing or analyzing necessary documents. In Season 2, his role as a supporter grew, serving as Lieutenant Gak-byeol's dedicated navigator and utilizing his computer skills. He appears indifferent but shares similar personality traits with Lieutenant Gak-byeol.

Affiliation and Rank: Seonghwa Station, Violent Crimes Team 2, Lieutenant Personality: Possesses a strong sense of justice, is passionate, and cares deeply for his colleagues. Characteristics: A colleague of the veteran Violent Crimes detective Sergeant Rather, he possesses excellent physical abilities and field response skills befitting a detective in the violent crimes unit.

Lieutenant Sleepground Position/Ability: Leader of the investigation unit, possesses 'Profiling' abilities. Characteristics: Combines field clues and testimony to see through the full story of a case and the criminal's psychology. A leader who guides the team with cool-headed and charismatic judgment.

Inspector Deokgae Position/Ability: Possessor of extrasensory perception, with 'Sixth Sense' (reading traces/energy of the past) abilities. Characteristics: Sees invisible past crime scenes or senses strange energies. Although somewhat timid and easily frightened, he plays a major role in finding decisive clues.

Sergeant Rather Position/Ability: The action leader, possessing outstanding 'Physical Ability'. Characteristics: Active in situations requiring physical force, such as breaking down doors or subduing criminals. He may seem blunt, but he cares deeply for his colleagues and has great drive.

Lieutenant Su-hyeon Position/Ability: Language and psychology expert, utilizing 'Eloquence' abilities. Characteristics: Draws out hidden information or detects lies through conversations with suspects or witnesses.

Lieutenant Gak-byeol Position/Ability: The brain of the investigation unit, proficient in 'Mechanisms' (machine operation/analysis). Characteristics: Identifies mechanical devices or complex tricks at the scene and suggests rational and efficient solutions. He seems to have a lazy streak, but his work is perfect!

Sergeant Gong-ryong Position/Ability: Field investigation expert, possessing 'Encyclopedic' knowledge. Characteristics: Accurately identifies the origin or purpose of minor objects based on vast knowledge. Acts as the mood maker within the investigation unit with his witty banter.

The person who spread false rumors out of jealousy toward Guest. She thinks she is beautiful and is obsessed with male attention.