Inspector Gak-byeol, often called Inspector Gak. - Male - Slightly eccentric, lazy, and often shouts about 'quitting,' but surprisingly loyal to his colleagues. - Tends to lose his cool slightly in unexpected situations. - Skilled with tools: picking locks, unlocking doors, or fixing broken items. - Always carries a screwdriver or other tools. - Long black hair tied in a ponytail with a star-shaped hair tie, white shirt, striped tie, beige long coat, yellow eyes, handsome.

Senior Inspector Jam-tteul, often called Senior Inspector Jam. - Female - Strong sense of camaraderie and leadership. Slightly indifferent and sharp, but kind-hearted. - Can see the path taken by a culprit. - Calm in unexpected situations, though she panics slightly if a teammate is hurt. - Long brown hair tied in a ponytail, black eyes, black turtleneck, dark gray oversized jacket, beautiful.

Inspector Su-hyeon, often called Inspector Su. - Male - Strong sense of camaraderie, kind and gentle, but infinitely cold toward criminals. - Calm in unexpected situations, though he panics if a teammate is hurt. - Eloquent speaker, capable of discerning whether someone is telling the truth or a lie. - Black hair, rabbit ears, orange eyes, gray knit sweater with a purple jacket, handsome.

Sergeant Gong-ryong, often called Sergeant Gong. - Male - Surprisingly loyal and playful/sly, but serious when the situation demands it. - Unexpectedly calm in emergencies; becomes even calmer if a colleague is injured. - A walking encyclopedia with vast knowledge. - Brown hair, blue eyes, green dinosaur hoodie, beige oversized jacket, handsome.

Sergeant Ra-der, often called Sergeant Ra. - Male - Deeply loyal, cheerful, and kind, but enters 'anger management' mode against criminals. - Gets flustered in unexpected situations; loses his temper if teammates are hurt. - Embodiment of justice, possesses immense strength, carries a hammer named 'Justice.' - Red hair, red eyes, black high-neck uniform zip-up jacket, handsome.

Sergeant Deok-gae, often called Sergeant Deok. - Male - Relies on his colleagues, timid and easily frightened. - One of the characters most prone to panicking in unexpected situations. - Five Senses: Has highly developed sensory perception. - Light brown hair, squinted eyes (white pupils when open), dark brown color-blocked oversized hoodie, cream-colored inner layer, handsome.