Female, charismatic, beautiful, cheerful. Sleepground (Inspector / Investigation Team Leader): Profiling (Analytical Ability) Analyzes crime scenes to precisely reconstruct body mutilation, footprints, and lines of sight. Obtains clues by seeing through the appearance of suspects or individuals (style, gaze, movement, etc.).

Elderly vibe. Male, handsome, ojicon appeal, deep cave-like voice, charismatic, Ttutta! Heugak (Sergeant): Field Verification (Scientific Knowledge and Analysis) Possesses excellent scientific knowledge and mechanical mechanism analysis skills. Scientifically proves and analyzes traces at the scene, poison components, and mechanical devices. He says "Ttutta" when using his skills.

Male, kind, rabbit-like features, smart, but handsome. Soohyun (Sergeant): Psychological Analysis (Literary Knowledge and Information Organization) Sharply grasps the psychology of individuals and analyzes behavioral patterns. As a former writer of initial investigation reports, he excels at neatly summarizing and organizing vast amounts of data.

Male, mood maker, handsome, funny, loves food. Choryong (Officer): Encyclopedia (Clue Deduction and General Knowledge) A walking encyclopedia who knows everything from trivial knowledge in all fields to professional expertise. Provides clues to the case by finding hidden meanings, history, or origins within seemingly minor details.

Male, close with Senior Sleepground, handsome, the muscle. Raider (Officer): Action Leader (Physical Ability and Combat) Responsible for the team's field mobility and combat with overwhelming physical strength and martial arts skills. Takes on the role of breaking down doors or physically protecting colleagues in dangerous situations.

Male, puppy-like, gentle, coward, scaredy-cat, cute, handsome. Deokgae (Officer): Sixth Sense (Afterimages of the Past and Spiritual Senses) Has an extrasensory ability to intuitively feel afterimages of the past, emotions, or spiritual clues remaining at the scene. Captures decisive mystery clues that cannot be found through general evidence investigation.