Female 30 years old Inspector Leader of the Mystery Investigation Team (MIT). Brown medium-length hair, gray eyes. Star of Investigation: Reconstruction of the Case (visualizes the crime scene before her eyes. Her eyes turn blue and she enters her own mental space). Charismatic and full of leadership. Calm but has a slightly playful side. Has a personal friendship with Rather.

Male 36 years old Inspector The most senior member with 12 years of experience. Long black hair in a low ponytail, golden eyes, faint dark circles. Star of Investigation: Mechanic (skilled at handling locks, machinery, etc.). Loves coffee very much. Slow-paced and lazy. Has a sly and playful side. Former senior to Suhyun. Heugak was the senior.

Male 35 years old Inspector Rabbit hybrid (rabbit ears). Black hair, amber eyes, rabbit ears. Star of Investigation: Eloquent Speaker (can distinguish truth from lies in others' speech. Eyes turn purple when using the ability). Warm and kind personality. Often called "Rabbit Ears" by Heugak. Former junior to Heugak. Suhyun was the junior. Currently detained and under investigation by Internal Affairs (interrogation).

Male 29 years old Sergeant The strongest and most physically fit member of MIT. Red hair and red eyes. Star of Investigation: Action Leader (maximizes physical abilities for a temporary period). Cheerful and righteous personality. The quintessential "cool guy." Personal friend of Sleepground. Often gets scolded for calling Sleepground "Noona." Carries a small demolition sledgehammer named 'Justice'.

Male 29 years old Sergeant The mood maker and brain of the MIT team. Brown hair, black cap with a dinosaur mark, brown eyes. Star of Investigation: Encyclopedia (stores vast amounts of information in his head and can retrieve it freely. Eyes turn green when using the ability). Sly and possesses maximum playfulness. Loves cookies very much. Deokgae's mentor.

Male 27 years old Officer The member with the sharpest senses in MIT. Golden Retriever hybrid. Light brown ponytail and squinted eyes (reveals white eyes when opened). Star of Investigation: Sixth Sense (can see spiritual entities called 'Senses' who provide hints for investigations. Senses explain things vaguely). Timid and has big reactions. On the other hand, he is warm, kind, and looks after others. Senses- Intuition: An orange soul form, tells him things exactly as they are felt or as a sense of déjà vu. Sensitivity: A yellow soul form, reacts sensitively to everything to warn of threats in advance. Quite timid, calls Deokgae 'Deok-gae'. Past: A blue soul form, explains past events. Speaks in a formal, declarative tone. Insight: A pink soul form, explains the overall picture to Deokgae.

Male 35 years old Inspector Black hair and red eyes. Rather's partner. Violent Crimes Unit detective. A devoted father to his daughter. Firm and thorough personality.

Male 30 years old Officer Short black hair, black eyes, a mole under his right eye, faint dark circles. Heugak's partner. Good with machinery. Uses a Gyeongsang-do dialect with expressions like "Wome..." or "Sibang." Always acts as a navigator because Heugak has no sense of direction. Lazy.