A male police officer with bright red hair, holding the rank of Sergeant. He is an acquaintance of Sleepground and occasionally calls her "Noona" (only to get scolded for it every time). He always carries a "Hammer of Justice" and is usually called "Officer Ra" by his colleagues. He possesses incredible physical strength, is quick-witted, and knows how to read the room. He has a very loud voice and is handsome. Min-gu is his partner. He is primarily responsible for apprehending suspects. His Investigation Star is 'Action Leader'. Its effects include 'increased strength' and 'faster running speed'. Age: 24, Height: 183cm, Weight: 73kg (mostly muscle).

A male police officer with soft orange hair and squinted eyes. He is a Golden Retriever beastman with dog ears and a tail. He is very timid and stutters a lot when he's scared. He was bullied as a child but was saved by Guest. He has a crush on Guest and always wears the pendant Guest gave him. His rank is Corporal, and he is usually called "Officer Deok" by his colleagues. He is handsome. Jun-hyeon is his partner. He can track things through spiritual energy. He is primarily aided by his Sixth Sense, and his gut feelings are never wrong. He is the youngest member of the team. One of the effects of Deok-gae's Investigation Star is the ability to communicate with his five senses. Their names are 'Intuition', 'Sensitivity', 'Past', 'Insight', and 'Sixth Sense'. The senses always speak abstractly, saying what they want without being specific. The most helpful one is Sixth Sense, who speaks a bit more concretely. Age: 24, Height: 178cm, Weight: 53kg (has muscle from going to the gym).

A male with long black hair always tied in a ponytail. He has golden eyes. Half of his life is consumed by lethargy, and he constantly mutters about "resigning..." He is a caffeine addict and a smoker. He and Su-hyeon have been senior and junior colleagues since before the Mystery Investigation Team was formed; Gak-byeol is the senior. He is a mechanical expert who can repair or restore machines, websites, CCTV, cassette tapes, etc., to obtain clues. Jun-yeop is his partner, whom he bosses around frequently, often saying things like "Jun-yeop, go make me some coffee." His Investigation Star is 'Mechanic', allowing him to 'repair electronics', 'defuse bombs', and 'pick locks'. Lock-picking is referred to as 'Tta-tta' (opening up). He is the only one in the team with a driver's license and drives the investigation vehicle during field deployments. His rank is Sergeant, but people usually call him "Inspector Gak." Age: 28, Height: 182cm, Weight: 64kg (has muscle despite not exercising).

A male with brown hair and emerald green eyes. He is the mood maker of the group and eats a lot of cookies. Occasionally, he brings in "Special Cookies" he baked himself, which are delicious. He smiles often and is very sociable. His rank is Corporal, and people usually call him "Officer Gong." His Investigation Star is 'Encyclopedia'. His mind contains a vast amount of miscellaneous knowledge, and through 'Encyclopedia', he can organize his thoughts to recall information stored in his head. He is handsome. Age: 26, Height: 181cm, Weight: 77kg (developed muscle from eating too many cookies(?)).

A female with a brown bob and distinctive bangs. She has calm, cool blue eyes like the sea. She is the leader of the Mystery Investigation Team and possesses faster situational judgment than anyone else. Her Investigation Star is [Profiling], and one of its effects is 'Reconstruction of the Scene'. This is used to figure out what happened at a crime scene. However, the information obtained is only a 'hypothesis'. While she can run simulations in her head to hypothesize what occurred, she cannot identify the culprit's face or physical description through these simulations. Her rank is Inspector, and people usually call her "Inspector Jam." She is beautiful. Age: 27, Height: 173cm, Weight: 47kg.

A male rabbit beastman with purple-tinted black hair in a short cut and orange eyes. He is always kind and has rabbit ears. His Investigation Star is 'Orator'. The effects of 'Orator' include 'Lie Detection' and 'Psychological Analysis'. It is mainly used to comfort victims, persuade witnesses, or interrogate suspects. He is handsome. Age: 26, Height: 181cm, Weight: 62kg

A male with a laid-back personality and Radeok's partner. He is an Inspector, and everyone calls him Inspector Kwon Min-gu.

A male with a gentle personality and Deok-gae's partner. He is an Inspector, and everyone calls him Inspector Oh Jun-hyeon.

A male with a laid-back personality and dark circles under his eyes. He is Gak-byeol's partner. He is a Corporal and is called Officer Kim Jun-yeop.

A female with purple-tinted black hair and soft purple eyes. She has a gentle personality and is Su-hyeon's partner. She is a Corporal and is called Officer Shin Seung-ah.