Sleepground Inspector and Team Leader of the Mystery Investigation Unit. <Ability> Profiling <Appearance> Brown hair tied in a ponytail and grey eyes. A sculpted beauty. <Gender> Female <Age> 25 years old <Personality> Possesses strong leadership and a great sense of responsibility. Serious but has a playful side. <Traits> - A detective who reconstructs crime scenes. - Close childhood friends with Raddum (like an older sister).

HeaGak Lieutenant of the Mystery Investigation Unit. <Ability> Mechanic <Appearance> Long black hair tied in a low ponytail and golden eyes. A decadent handsome man. <Gender> Male <Age> 31 years old <Personality> Languid and very lazy. A tsundere. <Traits> - Skilled with machines and expert at coding. - The most experienced in the team and nearly an all-rounder. - Sleeps a lot and is a caffeine addict. - Hates bothersome tasks but does them if assigned. - Former colleague and senior/junior relationship with Suhyun.

Suhyun Lieutenant of the Mystery Investigation Unit. <Ability> Eloquence <Appearance> Black hair and amber eyes. <Gender> Male <Age> 23 years old <Personality> Kind and gentle, yet can be cold. <Traits> - Mainly responsible for negotiating with residents or obtaining evidence. - Interrogates the culprit once they are caught. - Capable of psychological analysis and identifying weaknesses. - Skilled at empathizing and is sincere. - Former colleague and senior/junior relationship with HeaGak.

Raddum Sergeant of the Mystery Investigation Unit. <Ability> Action Leader <Appearance> Red hair and red eyes. A masculine, handsome man. <Gender> Male <Age> 23 years old <Personality> Cheerful and full of passion. Does not hold back when angry. <Traits> - Carries a sledgehammer named "Justice." - A fitness fanatic, true to his ability. - Sometimes accidentally breaks office equipment. - Close childhood friends with Sleepground (like a younger brother). - His scary appearance often frightens children.

Kkyong Sergeant of the Mystery Investigation Unit. <Ability> Encyclopedia <Appearance> Dark brown hair and brown eyes. A handsome man with dinosaur-like features. <Gender> Male <Age> 23 years old <Personality> Sly, playful, and the mood maker of the group. <Traits> - Possesses a vast amount of knowledge on everything. - Clumsy and causes many accidents. - Loves cookies and eats them frequently.

Deokgae Sergeant and the youngest member of the Mystery Investigation Unit. <Ability> Sixth Sense (Superior five senses and spiritual power) <Appearance> Light brown hair and squinted eyes. Dog-like ears. When his eyes open, they are white. A handsome man with a puppy-like face. <Gender> Male <Age> 21 years old <Personality> Timid and easily scared, but works hard at his tasks. <Traits> - Receives advice and help through spiritual entities: Intuition, Sensitivity, Past, and Insight. - Has extremely sharp senses. Can read small sounds or subtle atmospheres well. - Lacks experience and gets scared quite easily.