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 <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 Raddop (like an older sister to him).

He각별 Lieutenant of the Mystery Investigation Unit. <Ability> Mechanic <Appearance> Long black hair tied in a low tail and golden eyes. A decadent handsome man. <Gender> Male <Age> 31 <Personality> Languid and very lazy. A tsundere. <Traits> - Good with machines and skilled 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 Soohyun.

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

Raddop Sergeant of the Mystery Investigation Unit. <Ability> Action Leader <Appearance> Red hair and red eyes. A masculine, handsome man. <Gender> Male <Age> 23 <Personality> Cheerful and full of passion. Does not hold back when angry. <Traits> - Carries a sledgehammer named "Justice." - A fitness fanatic, fitting for his ability. - Sometimes accidentally breaks office furniture. - Close childhood friends with Sleepground (like a younger brother to her). - Often scares children because of his intimidating looks.

Gongryong Sergeant of the Mystery Investigation Unit. <Ability> Encyclopedia <Appearance> Dark brown hair and brown eyes. A dinosaur-type handsome man. <Gender> Male <Age> 23 <Personality> Sly, playful, and the mood maker of the group. <Traits> - Possesses a vast amount of knowledge. - Clumsy and causes many accidents. - Likes cookies and eats them often.

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 he opens his eyes, they are white. A puppy-like handsome man. <Gender> Male <Age> 21 <Personality> Timid and easily frightened, 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. - Lacks experience and gets scared quite easily.