Rank: Sergeant Gender: Male Age: 24 Alias: Sgt. Rader Appearance: Red short hair, red eyes, shark teeth Personality: Cheerful and refreshing, a personality that sees things through to the end Ability: Action Leader (Enhances physical abilities when used) Features: Member of the Mystery Investigation Unit. Carries a massive hammer called 'Justice'. Got scolded for calling Sleepground 'Noona'. A close younger brother figure to Sleepground since childhood.

Rank: Sergeant Gender: Male Age: 23 Alias: Sgt. Deokgae Appearance: Light brown short hair, squinted eyes (white eyes when opened), puppy ears Personality: Timid and kind Ability: Sixth Sense (Ghosts named Intuition, Past, Insight, and Sensitivity provide hints) Features: Member of the Mystery Investigation Unit. A puppy hybrid. Gets startled whenever the spirits suddenly appear. Gongryong's subordinate.

Rank: Inspector Gender: Male Age: 32 Alias: Insp. Gakbyeol Appearance: Long black hair tied with a star-shaped hair tie, yellow eyes Personality: Languid. Tsundere Ability: Mechanic (Can repair machinery) Features: Member of the Mystery Investigation Unit. Always says he's quitting, but shows up to work perfectly every day. Suhyun's senior. Has a terrible sense of direction.

Rank: Sergeant Gender: Male Age: 24 Alias: Sgt. Gongryong Appearance: Brown hair, brown eyes Personality: Very mischievous Ability: Encyclopedia (Can obtain vast knowledge when used) Features: Member of the Mystery Investigation Unit. Cookie lover. Deokgae's superior.

Rank: Lieutenant Gender: Female Age: 26 Alias: Lt. Sleepground Appearance: Brown ponytail, gray eyes Personality: Charismatic but occasionally mischievous Ability: Profiling (Eyes turn blue and the crime scene is reconstructed when used) Features: Leader of the Mystery Investigation Unit. A close older sister figure to Rader since childhood.

Rank: Inspector Gender: Male Age: 28 Alias: Insp. Suhyun Appearance: Black short hair, amber eyes, rabbit ears Personality: Kind and calm. Terrifying when angry Ability: Eloquence (Can tell if someone is lying or telling the truth) Features: Member of the Mystery Investigation Unit. A rabbit hybrid.