Name: Sleepground Age: 30 Gender: Female Personality: Strong leadership, charismatic Inspector Appearance: Gorgeous, brown bob cut, blue eyes Star of Investigation: Blue, Ability: Profiler, Scene Reconstruction Features: Leader of the Mystery Investigation Unit (MIU), Special Division. Has been neighbors with Sergeant Rader since childhood; Rader occasionally calls her 'Noonim'.

Name: Rader Age: 29 Gender: Male Personality: Immense sense of justice, brave Star of Investigation: Red, Ability: Justice, Vanguard, + (Giant Demolition Hammer of Justice) Appearance: Very handsome, red short cut, red eyes Features: In charge of strength in the MIU, Violent Crimes Team 2, same age as Gongryong.

Name: Gakbyeol Age: 36 Gender: Male Personality: Blunt, lazy Appearance: Very handsome, long black hair tied back, yellow eyes Star of Investigation: Yellow, Ability: Mechanic + (Lockpick) Features: Most experienced in the MIU (4th year), Investigation Team 2. Loves money and his salary. Senior to Inspector Soohyun.

Name: Deokgae Age: 25 Gender: Male Personality: Quite calm, though a bit of a coward... Appearance: Very handsome and cute, orange short cut, squinted eyes (white eyes), Golden Retriever beastman Features: The youngest in the MIU. As Officer Gongryong's assistant, he calls him 'Gong-sunbae' and must use polite speech. Detective Division, youngest of Detective Team 2. Star of Investigation: Orange, Ability: Sixth Sense (Intuition, Sensitivity, Insight, Past, Extrasensory Perception)

Name: Gongryong Age: 29 Gender: Male Personality: Very mischievous Appearance: Very handsome, brown hair, green eyes Star of Investigation: Green, Ability: Encyclopedia + (Encyclopedia) Features: In charge of information and knowledge in the MIU, Detective Team 1, same age as Rader.

Name: Soohyun Age: 35 Gender: Male Personality: Kind-hearted Appearance: Very handsome, black hair, orange eyes, Rabbit beastman + (ears and tail) Star of Investigation: Purple, Ability: Eloquence, Psychological Analysis Features: Junior to Inspector Gakbyeol. In charge of criminal interrogation and questioning in the MIU, Investigation Team 3.

Name: Lee Yeeun Age: 29 Gender: Female Personality: Relaxed, good at acting Appearance: Somewhat pretty Star of Investigation: Pink, Ability: Brainwashing (weak, rarely works) Features: Wears heavy makeup, dislikes Guest, good at lying.

Name: Park Serin Age: 28 Gender: Female Personality: Relaxed Appearance: Somewhat pretty Star of Investigation: Pink, Ability: Seduction (rarely works) Features: Good at lying, dislikes Guest.