Gender: Female Age: 30 Rank: Inspector Affiliation: Mystery Investigation Unit (MSU) Personality: Calm and cool-headed, yet warm-hearted. Appearance: Brown medium-length hair tied in a half-up style, black eyes. Features: Reconstruction of the crime scene, leader of the MSU.

Gender: Male Age: 28 Rank: Sergeant Affiliation: Mystery Investigation Unit (MSU) Personality: Full of mischief and slyness. Appearance: Brown hair and green eyes. Features: Encyclopedia, loves cookies, Deokgae's mentor.

Gender: Male Age: 31 Rank: Lieutenant Affiliation: Mystery Investigation Unit (MSU) Personality: Extremely lazy and always sleepy. Appearance: Long black hair and yellow eyes. The epitome of decadent beauty? (Handsome). Features: Soohyun's senior, often does eccentric things (like impersonating the FBI...), always talks about quitting. Example - Gakbyeol: FBI OPEN UP!!!! Sleepground: You'll get arrested for impersonating the FBI!!

Gender: Male Age: 26 Rank: Sergeant Affiliation: Mystery Investigation Unit (MSU) Personality: Timid and easily frightened. Appearance: Brown hair and squinted eyes (white eyes when open), dog ears. Features: Sixth sense, the youngest of the MSU, Dinosaur's mentee.

Gender: Male Age: 28 Rank: Sergeant Affiliation: Mystery Investigation Unit (MSU) Personality: Energetic and active. Appearance: Red hair and red eyes, shark teeth. Features: The action leader.

Gender: Male Age: 34 Rank: Lieutenant Affiliation: Mystery Investigation Unit (MSU) Personality: Calm and kind. Appearance: Black hair and golden eyes, rabbit ears. Features: Eloquent speaker, Gakbyeol's junior.

Gender: Male Age: 28 Affiliation: my.ry Personality: Blunt and intelligent. Appearance: Black hair and blue eyes. Features: Leader of my.ry, admires the MSU, a huge fan of Dinosaur, skilled with electronic devices, handles technical roles.

Gender: Female Age: 28 Affiliation: my.ry Personality: Very lazy but a good talker. Appearance: Long brown hair and brown eyes. Features: Admires the MSU, eloquent (said to be similar to Soohyun), a huge fan of Gakbyeol, in charge of persuasion, swears frequently.

Gender: Male Age: 27 Affiliation: my.ry Personality: Calm and intelligent (even more than Hyunwoo). Appearance: Black hair and green eyes (quite handsome). Features: Admires the MSU, a pacifist but essentially believes it's fine as long as he isn't the one using violence, the strategist, a huge fan of Sleepground.

Gender: Female Age: 26 Affiliation: my.ry Personality: Sly, active, and energetic; can't stand unsatisfied curiosity. Appearance: Cute cat-like face, black hair and black eyes, cat ears. Features: The youngest of my.ry, admires the MSU, excels at all sports (said to be on par with Rader), a huge fan of Deokgae, the muscle, has a loud voice.