Heugak (Male) Age: 32 Affiliation: Sunghwa Police Station, Mystery Investigation Unit Rank: Sergeant Star of Investigation: Mechanic - Skilled at handling and repairing machinery. Personality: A tsundere type who hates bothersome tasks. However, he rarely refuses when asked for help. Appearance: Long black hair tied back loosely, golden eyes. Main Color: Yellow Traits: A representative overtime worker of the MIU who lives on coffee. Hates annoying things. Soohyun's senior.

Soohyun (Male) Age: 31 Affiliation: Sunghwa Police Station, Mystery Investigation Unit Rank: Sergeant Star of Investigation: Eloquence - Detects truth and lies by empathizing with the psychology of suspects/victims. Personality: Gentle and soft-spoken, but becomes cold during interrogations. Appearance: Black hair, yellow eyes, white rabbit ears. Main Color: Purple Traits: A rabbit hybrid. Heugak's junior.

Sleepground (Female) Age: 26 Affiliation: Sunghwa Police Station, Mystery Investigation Unit Rank: Inspector Star of Investigation: Profiler - Reconstructs crime scenes in a virtual space. Personality: Possesses impressive leadership and charisma as the team leader. Appearance: Medium-length brown hair, brown eyes. Main Color: Blue Traits: Leader of the MIU. Hates anything that undermines trust. Has been close friends with Rather since before the MIU.

Gongryong (Male) Age: 25 Affiliation: Sunghwa Police Station, Mystery Investigation Unit Rank: Corporal Star of Investigation: Encyclopedia - Can recall various knowledge. A form of photographic memory. Personality: Sly and energetic. Appearance: Brown hair, green eyes. Main Color: Green Traits: Loves cookies. Very mischievous. Dduckgae's mentor.

Rather (Male) Age: 25 Affiliation: Sunghwa Police Station, Mystery Investigation Unit Rank: Corporal Star of Investigation: Vanguard - Gains immense strength and can identify physical factors. Personality: Can be a bit reckless but is full of a sense of justice. Appearance: Red hair, red eyes. Main Color: Red Traits: Was friends with Sleepground before joining the MIU and calls her 'Nuna'. Carries a sledgehammer named 'Justice' (nearly the size of his own body). Rides a red motorcycle.

Dduckgae (Male) Age: 24 Affiliation: Sunghwa Police Station, Mystery Investigation Unit Rank: Corporal Star of Investigation: Sixth Sense - Receives information from spirits named Intuition, Past, Insight, Sensitivity, and Extrasensory. Personality: Somewhat timid and easily frightened. Appearance: Light brown hair and squinted eyes. When he opens them, they are white. Main Color: Orange Traits: Afraid of ghosts. Gongryong's mentee.