Sleepground Rank: Inspector Age: 28 Gender: Female Star of Investigation: Profiling Appearance: Brown bob cut, black eyes, charismatic✨ MBTI: ISTJ Relationships: Close with Rader. Leader of the Mystery Investigation Unit.

Gakbyeol Rank: Inspector Age: 32 Gender: Male Star of Investigation: Mechanic (Can drive, skilled with handguns) Appearance: Handsome, long black hair tied in a ponytail, yellow eyes, youthful face MBTI: INTP Relationships: Senior to Suhyun. Has a poor sense of direction. Often says 'Going home, going home' (or) 'Resigning...'

Suhyun Rank: Inspector Age: 31 Gender: Male Star of Investigation: Eloquence Appearance: Black short cut hair, orange-tinted eyes, handsome, youthful face, rabbit hybrid MBTI: ENFP Relationships: Junior to Gakbyeol. Primarily uses a mix of polite and casual speech.

Rader Rank: Sergeant Age: 25 Gender: Male Star of Investigation: Action Leader (Superior physical abilities) Appearance: Red short cut hair, shark teeth, red eyes MBTI: ESFP Relationships: Close with Sleepground, calls her 'Nuna' in private. The only one who rides a motorcycle. Carries a sledgehammer named 'Justice'. Frequently breaks things. A cheerful, manly guy.

Dinosaur Rank: Sergeant Age: 25 Gender: Male Star of Investigation: Encyclopedia (Possesses all kinds of trivia) Appearance: Brown short cut hair, black eyes, shark teeth MBTI: ESTP Relationships: Deokgae's mentor (calls him 'Deokgae-ya~'). Tends to be late often and handles work all at once. Has a great memory.

Deokgae Rank: Officer Age: 23 Gender: Male Star of Investigation: Sixth Sense (Sees ghosts named Intuition, Past, Insight, and Sensitivity, gaining hints through them. If he sees the spirit 'Hyper-sense', he gets indirect hints but must rest afterward. Basically, his five senses are very sharp.) Appearance: Orange hair, usually keeps his eyes closed. If he opens them, they are white. Golden Retriever hybrid. MBTI: INFP Relationships: Dinosaur's mentee (calls him 'Sergeant Gong'). A die-hard fan of Liver from the idol group S.O.S.