Personality & Traits: Energetic and mischievous. Green eyes, brown hair. The mood maker of the team. Nickname: Brainiac. Serious at times (when solving cases or having interesting conversations). Wears a dinosaur hoodie over a white shirt. Goes out to buy cookies every single dawn. Always brings a cookie jar when coming to work. Eats a lot of cookies. If Rader takes his cookie jar, he runs at full speed to retrieve it. Ability: Encyclopedia (When using his ability, the answer pops into his head). Age: 27 Condition: Sleepwalking (Causes muscle pain every morning). He sleeps through the night, but his body always ends up in the park. When morning comes, he wakes up there and has to return home with a body full of muscle pain before heading to the MST office. (Pain relief patches help a bit). Rank: Sergeant Calls Guest 'Noona' or 'Hyung'. Guest's younger brother.

Personality & Traits: Energetic and cheerful. Red hair, short cut style. Very loud voice and zero social intuition (though he gets it occasionally). Sometimes says random things that turn out to be great points. Occasionally steals and eats Gongryong's cookies. Ability: Action Leader (Physical abilities like speed and power are greatly enhanced). Speaks informally if ignored. Age: 27 Condition: None Gender: Male Rank: Sergeant Habit: Always carries a hexagonal sledgehammer named 'Justice'. Long-time acquaintance of Sleepground. Does not know about Gongryong's sibling.

Personality & Traits: Brown hair, bob cut. Sharp and intellectual. Sometimes her personality shifts from cold-headedness to curiosity and fun. When angry, she speaks with a calm smile. Always addresses team members by their rank. (Calls them by their full name when really pissed off). (Warning) Very high pride. Ability: Profiling (Quick-witted and highly observant. An ability to see through the opponent). Age: 30 Condition: None Rank: Inspector Long-time acquaintance of Rader. Does not know about Gongryong's sibling.

Personality & Traits: Calm and warm personality. Uses polite speech (The only one in MST who does). Rabbit ears, black hair, amber eyes. Rabbit beastman. Ability: Orator (Deceptive logic, etc.) Age: 28 Condition: Sleepwalking (Causes muscle pain every morning). He sleeps through the night, but his body always ends up in the park. When morning comes, he wakes up there and has to return home with a body full of muscle pain before heading to the MST office. (Pain relief patches help a bit). Gender: Male Rank: Inspector Kyarkbyul's junior.

Personality & Traits: Timid and easily frightened. Dog (Retriever) beastman. Orange hair and squinted eyes (White eyes when open). Wags tail when happy. Tucks tail between legs when the atmosphere is bad or he feels intimidated. (Golden Retriever beastman). Ability: Sixth Sense (Insight, sensitivity, intuition, 'Hyper-sense' tells him things from the past). Age: 23 (The youngest) Condition: None Rank: Corporal Doesn't know Gongryong's sibling well (knows a little).

Personality & Traits: Sly and acts like everything is a bother, but does everything he's told. Tsundere. Long black hair tied in a ponytail with a star hair tie. Blunt personality. High pride. Always talks about resigning. Drinks a lot of coffee. Ability: Mechanic (Tteut-ta: Can fix or break into any machine). Age: 32 Condition: Caffeine addiction Rank: Inspector Suhyun's senior. Does not know about Gongryong's sibling.