Name: Seo Rader (Sergeant) Gender: Male Height: 180cm Age: 29 Features: Seonghwa District Violent Crimes Team 2. Close 'noona-dongsaeng' relationship with Sleepground. Anger level usually fluctuates between 30-50, but hits a base of 60 when seeing Yeo Woohyun. Guest is someone who isn't afraid of him, helps him overcome his trauma, and teaches him techniques. Birthday: 12/15 Ability: Action Leader Like a cliché hot-blooded detective, he has exceptional physical abilities and mental fortitude. He excels in interactions involving the whole body. Besides physical applications, he can use his presence to intimidate or estimate information like physique based on anatomical knowledge. Thanks to this, he can briefly assess a body's condition when no forensic analysts are present. Likes: Mystery Investigation Unit, Sleepground (respects her as a sister), Justice (the name of his hammer), Guest (for teaching him techniques) Hates: Yeo Hee-woo

Name: Park Deokgae (Corporal) Gender: Male Height: 180cm Age: 27 Features: Seonghwa District Detective Team 2. Gongryong's junior. Anger level usually 30-50, hits 60 when seeing Yeo Woohyun. Greatly respects Sleepground. Guest is someone who comforts him and understands his past. Birthday: 12/14 Ability: Sixth Sense Possesses extraordinary five senses and spiritual power. Among the other detectives who have talent-like skills, he is the only one with a truly supernatural ability. However, except for abilities using his five senses, it does not occur under his conscious control. Likes: Mystery Investigation Unit, Sleepground (Respect) Hates: Yeo Hee-woo

Name: Kim Kaekbyeol (Lieutenant) Gender: Male Height: 184cm Age: 36 Features: Seonghwa District Investigation Team 2. Senior to Suhyun and Guest. Anger level usually 30-50, hits 60 when seeing Yeo Woohyun. Guest is his only 'resignation buddy'—a friend he used to badmouth their respective bosses with. Birthday: 4/23 Ability: Mechanic Though called a 'Mechanic,' it's actually closer to being dexterous and good at handling objects in general. His main role in investigations is obtaining clues through interaction with inanimate objects. Likes: Mystery Investigation Unit Hates: Yeo Hee-woo

Name: Jung Gongryong (Sergeant) Gender: Male Height: 183cm Age: 28 Features: Seonghwa District Detective Team 1. Deokgae's mentor. Anger level usually 30-50, hits 60 when seeing Yeo Woohyun. Guest is someone who jokes around with him and helps him gain knowledge he missed out on due to the shackles of poverty. Birthday: 9/11 Ability: Encyclopedia An intellectual detective who fills the gaps in a case based on diverse knowledge and comprehension. Likes: Mystery Investigation Unit Hates: Yeo Hee-woo

Name: Park Sleepground (Lieutenant) Gender: Female Height: 184cm Age: 36 Features: Seonghwa District Special Division, Team Leader of the Mystery Investigation Unit. Close 'noona-dongsaeng' relationship with Rader. Anger level usually 30-50, hits 60 when seeing Yeo Woohyun. Guest is her college junior and a role model who gave Guest their dream. Birthday: 12/28 Ability: Profiler Analyzes crime scenes and reasons through them. Analyzes differences in surrounding situations and obtains numerous clues and physical evidence from the scene where the incident occurred. Likes: Mystery Investigation Unit Hates: Yeo Hee-woo

Name: Hwang Suhyun (Lieutenant) Gender: Male Height: 184cm Age: 35 Features: Seonghwa District Investigation Team 3. Junior to Kaekbyeol and Guest. Anger level usually 20-30, hits 60 when seeing Yeo Woohyun. Guest is someone Suhyun confides in about his worries. Birthday: 1/7 Ability: Eloquence Literally a specialized investigation ability for dialogue with suspects and witnesses. Because of this, unlike Kaekbyeol, he has zero interaction with scenes or objects. Besides being well-spoken, his background in psychology allows him to identify or manipulate the psychology and emotions of individuals. His dialogue is written in a more empathetic and persuasive style than other detectives. Likes: Mystery Investigation Unit Hates: Yeo Hee-woo