- Male - 176cm, 62kg - 29 years old - Red eyes and red hair - Sergeant - Just, dignified, and full of confidence - Star of Investigation ㄴ> Physical Enhancement Increased physical ability. Can be used in various situations with superior strength. Capable of breaking soft bricks or wooden doors, and dismantling flimsy iron gates. ㄴ> Stealth <Clash> Can acquire major clues but risks losing trust or causing a confrontation. <Sprint> Quickly moves from the current location to the next. Once moved, you cannot go back. <Hide> Scans the surroundings while holding breath. Can acquire various pieces of information. <Distraction> Can draw attention or pick something up. Can also check the current danger level. - Close with Sleepground since childhood, like siblings. In private meetings, he refers to her as 'Noonim'. - His natural hair color is red, but following the advice of the Inspector from his previous team before joining the Mystery Investigation Unit, he dyes it black using hair dye and hard wax.

- Male - 173cm, 63kg - 27 years old - Light brown hair and white eyes (pupilless). Has puppy ears. - Timid personality, prone to tears and easily frightened - Corporal - Star of Investigation ㄴ> Sixth Sense Possesses superior five senses and spiritual power. Among the other detectives whose abilities are closer to talent, he is the only one with a truly supernatural power. However, abilities outside of his five senses do not occur under his control. - He was brought into the team when he only had one year of experience as a corporal. When Sleepground first arrived at the police station, he was being briefed after his promotion ceremony before being dragged out to a crime scene. - Originally from the countryside, his parents died in a fire accident when he was young. Since then, he saw a dead body for the first time and began to communicate with the souls of the deceased.

- Male - 182cm, 60kg - 36 years old - Eccentric and finds everything bothersome; just a total eccentric - Inspector - Star of Investigation ㄴ> Mechanic Lockpicking skills, mainly used for opening locks. - Often conducts joint investigations with Inspector Soohyun, who can control Heugak's eccentric behavior. Heugak even mentioned, 'Why are we always together?' - Has the most seniority and experience among the members of the Mystery Investigation Unit. Perhaps because of this, he has mastered many skills outside of his professional field.

- Male - 180cm, 64kg - 29 years old - Brown hair and green eyes - Playful and has a sly side - Sergeant - Star of Investigation ㄴ> Encyclopedia Exploring the knowledge within his mind. However, it involves retrieving information he has seen once; if it's information he hasn't seen, the accuracy drops. - Coming from a small village and growing up poor, he says he has lived with the dream of becoming a police officer since he was a child.

- Female - 167cm, 52kg - 30 years old - Brown hair and grey eyes - Cool-headed and professional, but surprisingly playful and tsundere - Inspector - Star of Investigation ㄴ> Reconstruction of the Case Can be used at crime scenes where a body is found or in suspicious spaces. Allows for checking detailed scene analysis, autopsy results, footprints, and other evidence invisible to the naked eye. - The only member of the Mystery Investigation Unit from the Police Academy, appointed as an Inspector immediately after graduation. - After seeing people meet vague endings due to uncertain investigations at her first assigned station, Seokpa Station, she wanted to become a police officer who reveals the truth. However, the officers at Seokpa Station ignored her because she was young and lacked experience.

- Male - 186cm, 68kg - 35 years old - Black hair and orange eyes - Kind and empathetic, but has a bit of a 'crazy' streak - Inspector - Star of Investigation ㄴ> Eloquence An ability specialized for conversations with people. However, if the target refuses to talk at all, the ability cannot be used. - Weak at field investigations, so he often ends up investigating separately from other detectives or receives information that everyone else already knows late. - He has a very youthful face.