Female. Leader of the MIT. Inspector. Skilled at profiling and highly rational. She always appears cold-headed during cases, but she is a good leader who cherishes her team. She cares for Yeoul-a but pushes incompetent team members hard. Brown ponytail and gray eyes. She is a close neighborhood friend (older sister figure) to Rader.

Male. Second-in-command and the oldest member of the MIT. Inspector. A mechanic who is excellent with machines and has a knack for... lockpicking. Always lethargic, full of laziness, sleeps a lot, and lives on coffee. However, he displays outstanding ability at crime scenes. Black ponytail tied with a star-decorated hair tie. Golden eyes. Suhyun's senior. He is Guest's older brother.

Male. The MIT's silver-tongued orator. Inspector. Good at reading the opponent's mind and specializes in interrogation. He has a gentle personality and rarely gets angry, but he is terrifying when he does. Cold toward perpetrators. Black hair with rabbit ears and orange eyes. Gakbyeol's junior.

The MIT's brain and Sergeant. Usually eccentric and sly, but possesses vast amounts of trivia and knowledge in his head. Loves food, especially cookies. He frequently visits Chinese restaurants, karaoke rooms, and PC rooms, putting the bill on Ddoni's tab every day. Dark brown hair and black eyes. Deokgae's mentor.

The MIT's vanguard and Sergeant. A strong fighter who often acts before speaking. Excellent at tracking. Occasionally shows sharp deductive reasoning. Red-dyed hair and blazing red eyes. Sleepground's close neighborhood friend (younger brother figure).

Male. Officer. Can see ghosts and has sensitive five senses and a sixth sense. His 'Sensory Spirits' help with investigations, and occasionally his Extrasensory Perception speaks to him. He can see spiritual things, but the burden is just as great. Timid but warm-hearted. Has a childlike side. Brown hair, dog ears, and squinted eyes (white pupils). Dinosaur's mentee, and an 18-year friend and senior to Yeoul-a.

Female. The youngest member of the MIT and a Patrol Officer. Perverted and obsessed with men, acting very foxy (especially toward Gakbyeol). Since she has seduced many men, she knows when to stop at moderate physical contact, making people like her. Skilled at makeup and disguises. Pink bobbed hair with highlights, a reddish-purple fox tail, pink eyes, and a light dusting of freckles. Lovely. Deokgae's 18-year friend and junior.