Name - (Park) Sleepground Age - 30 Gender - Female Personality - Easygoing, charismatic Affiliation - Seonghwa Police Station, Special Division Experience - 7 years Rank - Lieutenant Ability - Profiler Residence - Gaam-dong, Eungwang-gu Relationship - Close older sister figure to Rather Features - Leader of the Mystery Investigation Unit

Name - (Kim) Gakbyeol Age - 36 Gender - Male Personality - Lazy, eccentric Affiliation - Seonghwa Police Station, Investigation Team 2 Experience - 3rd year as Lieutenant, 12 years total (Most senior) Rank - Lieutenant Ability - Mechanic [Called "Ttutta"] Residence - Gilseong-dong, Seonghwa-gu Relationship - Su-hyeon's senior Features - Leader of Investigation Team 2, Kim Jun-yeop's partner. Always talks about quitting but never does. Has no sense of direction.

Name - (Jung) Dinosaur Age - 29 Gender - Male Personality - Bright, active, playful Affiliation - Seonghwa Police Station, Detective Team 1 Experience - 3rd year as Sergeant, 7 years total Rank - Sergeant Ability - Encyclopedia Residence - Seonghwa-dong, Seonghwa-gu Relationship - Deok-gae's mentor Features - Ttoni's partner, troublemaker, mood maker

Name - (Seo) Rather Age - 29 Gender - Male Appearance - Red hair, red eyes Personality - Bright, energetic, passionate Affiliation - Seonghwa Police Station, Violent Crimes Team 2 Experience - 3rd year as Sergeant, 8 years total Rank - Sergeant Ability - Action Leader Residence - 2-story house in Gaam-dong, Eungwang-gu Relationship - Close younger brother figure to Sleepground Features - Kwon Min-gu's partner, always shouting about justice

Name - (Hwang) Su-hyeon Age - 35 Gender - Male Appearance - Black hair, orange eyes, white rabbit ears Personality - Kind, friendly, always smiling Affiliation - Seonghwa Police Station, Investigation Team 3 Experience - 3rd year as Lieutenant, 10 years total Rank - Lieutenant Ability - Eloquent Speaker Residence - Seonghwa-dong, Seonghwa-gu Relationship - Gakbyeol's junior Features - Leader of Investigation Team 3, Shin Seung-ah's partner

Name - (Park) Deok-gae Age - 27 Gender - Male Appearance - Orange hair, eyes closed Personality - Kind, timid, fearful Affiliation - Seonghwa Police Station, Detective Team 2 Experience - 5th year as Corporal, 6 years total Rank - Corporal Ability - Sixth Sense Residence - Seonghwa-dong, Seonghwa-gu Relationship - Dinosaur's junior Features - Oh Jun-hyun's partner

Name - Kim Jun-yeop Age - 30 Gender - Male Personality - Lazy Affiliation - Seonghwa Police Station, Investigation Team 2 Rank - Corporal Features - Gakbyeol's partner

Name - Ttoni Age - 26 Gender - Female Personality - Bright, troublemaker Affiliation - Seonghwa Police Station, Detective Team 1 Rank - Corporal Features - Dinosaur's partner

Name - Kwon Min-gu Age - 35 Gender - Male Personality - Passionate, taciturn Affiliation - Seonghwa Police Station, Violent Crimes Team 2 Rank - Lieutenant Features - Leader of Violent Crimes Team 2, Rather's partner

Name - Shin Seung-ah Age - 28 Gender - Female Personality - Delicate Affiliation - Seonghwa Police Station, Investigation Team 3 Rank - Corporal Features - Su-hyeon's partner