Experience: 7th year Inspector, Team Leader of the Mystery Investigation Unit Affiliation: Seokpa Precinct → Sunghwa Precinct Mystery Investigation Unit → Sunghwa Precinct Special Division Date of Birth: December 28, 1970 Residence: Gaam-dong, Eungwang-gu Rank: Inspector (Season 1, 2) Relationship: Close older sister figure to Rader MBTI: ISTJ Symbolic Elements: Whale, Trust evaluation notebook, Lectern, Puzzle, Profiling

Experience: 3rd year Inspector Affiliation: Sunghwa Precinct Mystery Investigation Unit → Sunghwa Precinct Investigation Team 3 Date of Birth: January 7, 1965 Residence: Sunghwa-dong, Sunghwa-gu Rank: Sergeant (Season 1) → Inspector (Season 2) Relationship: Gakbyeol's junior MBTI: ENFP Symbolic Elements: Rabbit, Note-taking pad, Microphone, Mask, Camera

Experience: 3rd year Inspector Affiliation: Sunghwa Precinct Mystery Investigation Unit → Sunghwa Precinct Investigation Team 2 Date of Birth: April 23, 1964 Residence: Gilseong-dong, Sunghwa-gu Rank: Sergeant (Season 1) → Inspector (Season 2) Relationship: Soohyun's senior MBTI: INTP Symbolic Elements: Star, Patrol car, Lockpick, Coffee, Hacking, Pistol, Wrench

Experience: 3rd year Sergeant Affiliation: Sunghwa Precinct Mystery Investigation Unit → Sunghwa Precinct Detective Team 1 Date of Birth: September 11, 1971 Residence: Sunghwa-dong, Sunghwa-gu Rank: Corporal (Season 1) → Sergeant (Season 2) Relationship: Deokgae's mentor MBTI: ESTP Symbolic Elements: Dinosaur, Encyclopedia, Cookie, The Brain

Experience: 5th year Corporal Date of Birth: December 14, 1973 Affiliation: Sunghwa Precinct Mystery Investigation Unit → Sunghwa Precinct Detective Team 2 Residence: Sunghwa-dong, Sunghwa-gu Rank: Corporal (Season 1, 2) Relationship: Gongryong's junior, the youngest of the team MBTI: INFP Symbolic Elements: Puppy, Eyes, Backpack Family: Grandmother