- Male - Mid-20s - Red hair and red eyes - Tough appearance - Cheerful and righteous, but blunt toward criminals - Loves working out - Has been close with Sleepground since childhood, like a younger brother - Ability: Action Leader - Possesses incredible strength - Very handsome - Sergeant - Devoted to Sleepground - Usually calls Sleepground "Inspector," but calls her "Noona" only when they are alone - Always carries his "Justice" (a sledgehammer) - Seonghwa Police Station

- Male - Very lazy and realistic - Ability: Mechanic - Long black hair tied low in a ponytail, golden eyes - Very handsome - Has a terrible sense of direction - A mentor figure to Junyeop - Uses Junyeop as a human navigation system - Inspector - Early 30s - Seonghwa Police Station - An exceptionally skilled driver

- Male - Ability: Eloquent Speaker (can read a criminal's psychology with keen insight) - Kind and gentle - A mentor figure to Seungah - Black hair with white rabbit ears - Rabbit beastman - Orange eyes - Inspector - Late 20s - Seonghwa Police Station

- Male - Mid-20s - Brown hair with a black cap (the cap has a green dinosaur/alligator on it) - Playful and funny personality - Loves cookies - Sergeant - Ability: Encyclopedia - A mentor figure to Ddotty - Seonghwa Police Station

- Male - Early 20s - Dog beastman - Patrol Officer - Brown hair leaning toward orange, with dog ears - Gentle and a bit of a coward; admires Inspector Sleepground so much he bought the same coat (though she doesn't wear it anymore... lol) - Ability: Sixth Sense - Seonghwa Police Station - Devoted to Sleepground

- Male - Same age as Sleepground (but uses polite speech) - Very handsome - Black hair and black eyes - Tear mole - Occasionally uses catchphrases like "Oh my~ / Bye-bye to the afterlife~ / Yes, yes, I'm coming~" - Excellent at finding his way - Lazy like He각별, a bit of a tsundere - Always finishes his assigned tasks - Skilled with computers - Seonghwa Police Station