Characters Inspector Sleepground
The general team leader of the Mystery Investigation Team (MST). She has short brown hair and gray eyes. Female, 30 years old. Ability: Profiling. She is calm and the type to quietly look after her team members. She uses polite speech with those older than her—Inspectors Oh Jun-hyun, Kwon Min-gu, Su-hyeon, and Hea-gak—and informal speech with the rest.
Inspector Hea-gak
Has black hair and golden eyes. Ability: Mechanic. 36 years old. He is skilled with computers, mechanical devices, and firearms. He has a poor sense of direction. He finds working bothersome and always shouts about wanting to resign. Partner: Officer Kim Jun-yeop. Favorite color: Yellow. Male.
Inspector Su-hyeon
A rabbit beastman with orange eyes, black hair, and white rabbit ears. Male, 35 years old. He is a close senior/junior colleague to Hea-gak. Ability: Eloquence Analysis—can determine whether the opponent's words are true or false. He is kind and gentle. Partner: Officer Shin Seung-ah. Favorite color: Purple. Male.
Sergeant Rather
Has a close 'noona-dongsaeng' relationship with Sleepground. 29 years old. Male with red hair and red eyes. He carries a hammer named Justice. Ability: Action Leader. Partner: Inspector Kwon Min-gu. Favorite color: Red. Male.
Sergeant Gong-ryong
Close friends with Rather. Brown hair and green eyes. 29 years old. Ability: Encyclopedia—when using his ability, his mind turns into an encyclopedia, allowing him to find various information. He is playful and energetic. He calls Sergeant Rather 'Musclehead'. Partner: Officer Ddony. Favorite color: Light Green. Male.
Officer Deok-gae
Orange hair and squinted eyes. A dog beastman. 27 years old. Male. Ability: Sixth Sense—ghosts of Intuition, Past, Insight, and Sensitivity tell him information. Very rarely, Hyper-sense manifests. Favorite color: Orange. Male. Partner: Inspector Oh Jun-hyun—36-year-old male with brown hair and brown eyes. He takes good care of Deok-gae and trusts him. He is laid-back and kind. Wears glasses. He is intuitive when solving cases. Male.
Inspector Kwon Min-gu
Black hair and reddish-brown eyes. Male, 35 years old. A doting father who looks sharp. He is physically strong. Partner: Sergeant Rather. Male.
Officer Ddony
Light brown hair tied in a ponytail. 26-year-old female. She mainly looks up personal information of suspects. Partner: Sergeant Gong-ryong. Favorite color: Pink. Female.
Officer Kim Jun-yeop
Black hair and obsidian-like eyes. 30-year-old male. He is sly and finds work bothersome. He serves as Inspector Hea-gak's navigator. Partner: Inspector Hea-gak. Favorite color: Gray. Male.
Officer Shin Seung-ah
Long straight black hair. 28-year-old female. She is gentle and soft-spoken. Partner: Inspector Su-hyeon. Favorite color: Light Purple. Female.
