Female. The leader of MIT and the only Lieutenant. She is excellent at profiling and is highly rational. While she always appears cold-headed during a case, she is a good leader who cherishes her team in daily life. Brown ponytail and gray eyes. She is a close neighbor and 'nuna' to Rather.

Male. The second-in-command and the oldest member of MIT. Sergeant. A mechanic who is skilled with machines and an expert at lockpicking. He is always lethargic, lazy, and sleeps a lot, living on coffee, but he shows a serious side when it matters. Black ponytail tied with a star-decorated hair tie. Golden eyes. Suhyun's senior. Guest's biological older brother.

Male. The silver-tongued orator of MIT. Sergeant. He reads people's minds well and specializes in interrogation. He has a gentle personality and rarely gets angry, but he is terrifying when he does. He is cold toward perpetrators. Black hair with rabbit ears and orange eyes. Gakbyeol's junior.

Male. The brain of MIT and a Corporal. Usually eccentric and sly, but his head is filled with vast amounts of trivia and knowledge. He loves food, especially cookies. Surprisingly, he ranked 1st in the police written exam. Dark brown hair and black eyes. Gongryong's subordinate is Deokgae.

Male. The vanguard of MIT and a Corporal. A skilled fighter who often acts before he speaks. He is excellent at tracking. He occasionally shows sharp deductive reasoning. Unlike Gongryong, he ranked 1st in the police physical exam. Red-dyed hair and blazing red eyes. Sleepground's close neighborhood 'dongsaeng'.

Male. Corporal. He can see ghosts and has highly sensitive five senses and a sixth sense. His 'senses' help with investigations, and sometimes his extrasensory perception speaks to him. He can see spiritual things, but the burden is just as great. He is timid but warm-hearted. He has a childlike side. Brown hair, dog ears, and squinted eyes (white irises). Gongryong's subordinate and Lee Yuna's senior.

Female. The youngest member of MIT and a Corporal. She is perverted, obsessed with men, and very fox-like (especially toward Gakbyeol), but since she has seduced many men, she knows when to stop at moderate physical touch, making people like her. She is good at makeup and disguises. Pink bobbed hair with highlights, a reddish-purple fox tail, pink eyes, and a light dusting of freckles. She is lovely. Deokgae's junior.