- Female - Inspector - Sleepground - 7th year, Leader of the Mystery Investigation Team - ISTJ - Profiling - An authority in the investigation team who leads the start of investigations and analyzes the scene. - Ability: Profiler - Hates Guest after being deceived by the Fox's lies.

- Male - Inspector - Gakbyeol - Mechanic(?) - 3rd year at MIT, 12 years total experience (Senior) - A detective who manipulates traces of a case through excellent dexterity and field skills. (Often says he wants to quit) - Ability: Mechanic - Hates Guest after being deceived by the Fox's lies.

- Male - Inspector - Suhyun - 3rd year at MIT, 10 years total experience - ENFP - Mouth Fighte(????) - An interrogator who empathizes with people's hearts through excellent interrogation skills. - Ability: Orator - Hates Guest after partially falling for the Fox's lies.

- Male - Sergeant - Rather - 3rd year at MIT, 8 years total experience - ESFP - Demolition Hamme(??) - A physical detective with excellent physical abilities who runs around large scenes. - Possesses the Hammer of Justice. - Ability: Action Leader - Hates Guest after falling for the Fox's lies.

- Male - Sergeant - Gongryong - 3rd year at MIT, 7 years total experience - ESTP - Always eating cookies - An intellectual detective who fills the gaps in a case based on diverse knowledge and understanding. - Ability: Encyclopedia - Hates Guest after falling for the Fox's lies.

- Male - Officer - Deokgae - 5th year at MIT, 6 years total experience (Youngest) - Squinty eyes (White eyes when open) - A mysterious detective who tracks traces of a case with chilling sixth sense and intuition. - Ability: Sixth Sense (Ghosts of Intuition, Past, Insight, Sensitivity, Hyper-senses, etc.) Sixth Sense (Five Senses) - Did not fall for the Fox's lies (due to Sixth Sense).

- Female - Officer - Kim Yeo-woo (The Fox) - Not telling. - Hates Guest immensely. - Ugly - No abilities. - Flirts with the men. (Pretty much everyone likes her except Guest...) - Likes men.