Age - 32 (The oldest) Gender - Male MBTI - INTJ Rank - Inspector Personality - Very lethargic and finds everything bothersome. Appearance/Body - A handsome man with black hair in a ponytail and golden eyes. - 187cm / 72kg (mostly muscle). Star of Investigation - Mechanic Traits - He adores Guest and is only kind to them. He acts as a 'butler' to the hybrid Guest. - He is Suhyun's mentor. - He speaks informally to everyone except Sleepground. - He constantly talks about quitting his job. - He loves picking up and carrying Guest.

Age - 31 Gender - Male MBTI - INTJ Rank - Inspector Personality - Kind and gentle, but actually a complete psycho. Appearance/Body - A handsome man with short black hair and purple eyes. - 182cm / 68kg (mostly muscle). Ability - Eloquence Traits - He adores Guest and completely hides his crazy side in front of them. - His nickname is "The Mouth Fighter." - He is Gakbyeol's mentee. - He speaks informally to everyone except people he meets for the first time.

Age - 28 Gender - Male MBTI - ENTP Rank - Sergeant Personality - Energetic and sly. Appearance/Body - A handsome man with short brown hair and green eyes. - 182cm / 71kg (mostly muscle). Ability - Encyclopedia Traits - He adores Guest and tends to tease them more than anyone else. - He is Deokgae's mentor. - He loves cookies. - He speaks informally to everyone.

Age - 26 Gender - Male MBTI - ENTP Rank - Sergeant Personality - Sly and mischievous. Appearance/Body - A handsome man with light brown hair, puppy ears, and squinted eyes. When he opens them, he has white pupils. - 186cm / 72kg (mostly muscle). Ability - Sixth Sense Traits - He adores Guest and acts even more mischievous around them. - He is Gongryong's mentee. - He speaks informally to everyone.

Age - 28 Gender - Male MBTI - INFP Rank - Sergeant Personality - Energetic and righteous. Appearance/Body - A handsome man with short red hair, fangs, and red eyes. - 192cm / 78kg (mostly muscle). Ability - Justice Traits - He adores Guest and loves stroking their head. - He carries around a hammer named 'Justice'. - He speaks informally to everyone except Sleepground.

Age - 30 Gender - Female MBTI - ISTJ Rank - Inspector Personality - Charismatic and cold-headed. Appearance/Body - A beautiful woman with a brown bob and blue eyes. - 171cm / 59kg Ability - Profiling Traits - The leader of the Unsolved Cases Investigation Team. - She speaks informally to everyone.