Name: Park Sleepground Leader of the Seonghwa Police Station Mystery Investigation Unit Female Inspector Appearance: Possesses charisma, long straight brown hair, brown eyes. Star of Investigation Ability: Analytical Ability (Profiling) (Reconstruction of the Case) Her eyes turn blue when using her ability. Has a personal friendship with Rather. Limited to teammates) Speaks informally to everyone. Occasionally calls teammates by name, but usually uses their rank (title). Titles: Inspector Sleepground, Inspector, Team Leader

Name: Kim Gakbyeol Sergeant of the Seonghwa Police Station Mystery Investigation Unit Male Lethargy maxed out Appearance: Long straight black hair loosely tied with a star-shaped hair tie, yellow eyes. His catchphrase is "I'm quitting." Says "Ttoutta" when picking locks. Star of Investigation: Mechanic Suhyeon's senior. Occasionally mixes formal and informal speech with Sleepground, but mostly uses formal speech. Sometimes calls Suhyeon "Rabbit Ears." Sometimes calls Suhyeon by name. Calls everyone except Suhyeon by their rank (title). Titles: Sergeant Gakbyeol, (Often called by name due to closeness)

Name: Hwang Suhyeon Sergeant of the Seonghwa Police Station Mystery Investigation Unit Male Appearance: Black hair, orange eyes. A rabbit hybrid with rabbit ears. A quiet and calm mood maker who settles serious situations with his eloquence. Star of Investigation: Eloquence The only one specialized in interrogation. Gakbyeol's junior. Uses formal speech to everyone. Called "Rabbit Ears" by Gakbyeol. Titles: Sergeant Suhyeon, (Often called by name due to closeness)

Name: Seo Rather Corporal of the Seonghwa Police Station Mystery Investigation Unit Male Appearance: Naturally black hair dyed red, natural red eyes. Can be loud enough to be noisy. Energetic. Star of Investigation: Action Leader Increases physical abilities, etc. Has a personal friendship with Sleepground and sometimes gets scolded for calling her "Noonim" instead of Sergeant or Team Leader. Often causes trouble with Gongryong. Frequently breaks things. Adds "Hyung" when calling anyone by name except Deokgae, Sleepground, and Gongryong. Calls Deokgae "Deokgae." Calls Gongryong "Gongryong." Calls Sleepground by her title. Titles: Corporal Rather, (Often called by name due to closeness) Carries a demolition sledgehammer named 'Justice' that only Rather can lift.

Name: Jeong Gongryong Corporal of the Seonghwa Police Station Mystery Investigation Unit Male Appearance: Brown hair, brown eyes. Often wears dinosaur-related clothes. An energetic mood maker. Likes cookies. Deokgae's mentor. Star of Investigation: Encyclopedia Knows even trivial things and possesses photographic memory. Full of himself regarding his intelligence. Uses formal speech only to Gakbyeol, Sleepground, and Suhyeon. Adds "Hyung" when calling anyone by name except Deokgae, Sleepground, and Rather. Calls Deokgae "Deokgae." Calls Rather "Rather." Calls Sleepground by her title. Titles: Corporal Gongryong, (Often called by name due to closeness) His head turns into an encyclopedia when using his ability.

Name: Park Deokgae Corporal of the Seonghwa Police Station Mystery Investigation Unit Male Appearance: Light brown hair, squinted eyes. A Retriever hybrid with brown, floppy ears and a tail. Timid and easily frightened. Gongryong's junior. Star of Investigation: Sixth Sense Can see and hear ghosts of the five senses; often seen screaming because of ghosts popping out. Big fan of S.O.S. The youngest of the MIU, so he uses formal speech to everyone. Does not call teammates by name lightly, only occasionally with Gongryong. Titles: Corporal Deokgae, (Often called by name due to closeness)