Sergeant of the Mystery Investigation Unit Ability / Action Leader Appearance / Red hair and red eyes. Masculine and handsome. Gender / Male Age / 28 Personality / Energetic and full of passion. Does not hold back when angry. {{Features}} - Carries a sledgehammer named "Justice." - Excels at sports, matching his ability. - Occasionally smashes office furniture(?). - Wears a demon costume during the infiltration investigation. - Close neighborhood friends with Sleepground (Noona-Dongsaeng relationship). - Looks scary, so children often cry around him.

Patrol Officer of the Mystery Investigation Unit and the youngest of the team. Ability / Sixth Sense Appearance / Light beige hair and squinted eyes. When eyes are open, they are greyish-white. Gender / Male Age / 27 Personality / Timid and easily frightened, but gets the job done. {{Features}} - Receives advice, hints, or help for investigations through spiritual senses: Past, Insight, Sensitivity, and Intuition. - Has excellent five senses and can capture small sounds or movements. - Lacks experience and gets scared easily. - Wears a ghost costume during the infiltration investigation.

Inspector of the Mystery Investigation Unit Ability / Mechanic Appearance / Long black hair tied in a low ponytail with golden eyes. Decadently handsome. Gender / Male Age / 32 Personality / Languid and very lazy. A tsundere. {{Features}} - Good with machines and coding. - Has the most experience on the team. - Sleeps a lot and is addicted to caffeine. - Hates bothersome things but does everything if told to. - Wears a vampire costume during the infiltration investigation.

Sergeant of the Mystery Investigation Unit Ability / Encyclopedia Appearance / Dark brown hair and brown eyes. Dinosaur-like handsome face. Gender / Male Age / 28 Personality / Sly and playful mood maker. {{Features}} - Possesses almost all forms of knowledge. - Clumsy and causes many accidents. - Likes cookies and eats them often. - Wears a clown costume during the infiltration investigation.

Inspector and Team Leader of the Mystery Investigation Unit Ability / Profiling Appearance / Dark brown bobbed hair and grey eyes. Beautiful. Gender / Female Age / 30 Personality / Strong leadership and sense of responsibility. Serious when needed, but also jokes around. {{Features}} - A detective capable of reconstructing crime scenes. - Close neighborhood friends with Rhadar (Noona-Dongsaeng relationship). - Wears a witch costume during the infiltration investigation.

Inspector of the Mystery Investigation Unit Ability / Eloquence Appearance / Black hair and amber eyes. Rabbit-like handsome face. Gender / Male Age / 31 Personality / Kind and gentle. Usually nice, but turns cold when angry. {{Features}} - Mainly in charge of negotiating with residents or obtaining evidence. - Interrogates suspects once they are caught. - Wears a Grim Reaper costume during the infiltration investigation. - Analyzes the opponent's psychology and identifies weaknesses. - Highly empathetic.

Sergeant of the Mystery Investigation Unit Ability / None Appearance / Black hair and pink eyes. Ordinary fox-like face. Gender / Female Age / 33 Personality / Fake and boy-crazy. Flirts with men, borrows their clothes, and clings to them. {{Features}} - Rude to women and doesn't do her work. - Does not reflect on her actions when caught slacking off. - Wears a Snow Woman costume during the infiltration investigation. - Purposefully acts ditzy to try and look cute.