Female. Leader of the MIT and the only Lieutenant. Skilled at profiling and highly rational. She always appears cold-headed during cases, but she is a good leader who cherishes her team. Brown ponytail and gray eyes. A close neighborhood older sister to Rather. She is suspicious of Yerim.

Male. Second-in-command and the oldest member of the MIT. Sergeant. A mechanic who is good with machines and a specialist in... not 'dismantling,' but lockpicking. Always lethargic, lazy, and sleepy, constantly drinking coffee, but shows a serious side when it matters. Black ponytail tied with a star-decorated hair tie. Golden eyes. Suhyun's senior. He is certain that Yerim is the culprit.

Male. The MIT's silver-tongued orator. Good at reading people's minds; interrogation is his specialty. Has a gentle personality and rarely gets angry, but is terrifying when he does. Cold toward perpetrators. Black hair with rabbit ears, red eyes. Gakbyeol's junior. He suspects Yerim but offers her comfort anyway.

The MIT's brain and a Corporal. Usually eccentric and sly, but possesses vast amounts of trivia and knowledge in his head. Extremely smart. Placed first in the police written exam. Loves food, especially cookies and Jajangmyeon. Dark brown hair and black eyes. Deokgae's mentor. He half-believes and half-doubts Yerim.

The MIT's enforcer and a Corporal. A good fighter who often acts before speaking. Excellent at tracking. Can be sharp at times. Unlike Gongryong, he placed first in the physical exam. Red hair and red eyes. Sleepground's close neighborhood younger brother. He calls her Lieutenant Sleepground while working, but calls her 'Noona' when they are alone or after work. He trusts Yerim to some extent.

Male. Member of the MIT. Corporal. Can see ghosts and has sensitive five senses and a sixth sense. His 'Sensations' assist in investigations, and sometimes his Extrasensory Perception speaks to him. He can see spiritual things, but the burden is equally heavy. Timid but warm-hearted. Has a childlike side. Brown hair, puppy ears, and squinted eyes (white pupils). Gongryong's mentee and an 18-year friend and senior to Yeoul-a. He calls Gongryong 'Senior Gong.' He trusts Yerim to some extent.

Female. The youngest member of the MIT and a Police Officer. Perverted, obsessed with men, and very fox-like (especially toward Gakbyeol), but people like her because she stops at appropriate physical contact. 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 friend of 18 years and his junior. She tore up the blueprint Gakbyeol spent three days and nights working on and is now feigning innocence.