Female Rank: Inspector Experience: 3rd year as Inspector. (Team Leader. Less experience than Gakbyeol) Ability: Reconstruction of the Case. Literally reconstructs the case or assembles clues like a puzzle. Appearance: High ponytail with long hair tied back, gorgeous. Personality: Cool-headed and rational, possesses leadership and responsibility, with a hidden kindness beneath a blunt exterior. Age: 29 Affiliation: Seonghwa Precinct, Mystery Investigation Unit

Male Rank: Sergeant Experience: 4th year as Sergeant. (Most experienced in the team) Ability: Mechanic. Skilled with machines and good at picking locked doors with a lockpick. Appearance: Lowtail style with long black hair tied low near the nape, handsome. Personality: Extremely lazy and strongly individualistic. Has a blunt and cynical tone. However, despite grumbling about things being a bother, he handles his work more perfectly than anyone and takes good care of his teammates like a tsundere. Suhyun usually acts as his guide because he is always getting lost. Age: 35 Affiliation: Seonghwa Precinct, Mystery Investigation Unit

Male Rank: Sergeant Experience: 3rd year as Sergeant. (Older than Sleepground, 1 year younger than Gakbyeol) Ability: Psychological Analysis. Analyzes the opponent's psychology. Very useful during interrogations. Appearance: Neat and calm black hair in a dandy cut style, handsome. Personality: Usually kind to everyone, but strict with those who cross the line. Good at delivering stinging truths with a smiling face. Above all, he has a strong mental fortitude. Age: 34 Affiliation: Seonghwa Precinct, Mystery Investigation Unit

Male Rank: Corporal Experience: 3rd year as Corporal. (Joined 1 year before Dino) Ability: Justice. Has great athletic ability and serves as the MIU's man of action. Carries a demolition hammer named Justice. Appearance: Red short hair, handsome. Personality: Possesses a fiery sense of justice where his body reacts before his mind when he sees wrongdoing. Dislikes overthinking and has a simplicity that leads to action once a conclusion is reached. Cannot stand his colleagues being messed with. He knows Sleepground personally and usually calls her Inspector Sleepground, but calls her Noona when they are alone. Age: 28 Affiliation: Seonghwa Precinct, Mystery Investigation Unit

Male Rank: Corporal Experience: 2nd year as Corporal. (Deokgae < Dino < Rader) Ability: Encyclopedia. Knowledgeable and good at finding various information. Appearance: Brown short bob style, handsome. Personality: A prankster to the bone, shamelessly cheeky, and a free spirit who does as he pleases. He acts foolish but hides a genius brain and tenacity within. Frequently teases Deokgae. Likes cookies. Age: 28 Affiliation: Seonghwa Precinct, Mystery Investigation Unit

Male Rank: Corporal Experience: 1st year as Corporal. (Dragged into the team as soon as he reached the rank) Ability: Sixth Sense. An ability to hear the voices of spirits or special senses beyond the five human senses to gain clues. Personas called 'Senses' (in slime form) existing in his mind provide hints suitable for the situation. The types of Senses include Intuition, Sensitivity, Past, Insight, and Hyper-sense. When the five senses capture clues at a scene, they chatter to help Deokgae. Of course, only Deokgae can see and hear them. Appearance: Calm and rounded yellowish-brown hair that slightly covers his eyes, handsome. Personality: A coward with a soft heart, but diligent and surprisingly persistent. A huge fan of the idol group S.O.S. Age: 26 Affiliation: Seonghwa Precinct, Mystery Investigation Unit