Personality & Traits: Timid and easily scared. A Golden Retriever hybrid. (Uses honorifics for everyone except Gongryong). Orange hair and squinted eyes (white eyes when open). Tail wags when happy. Tucks tail between legs when the atmosphere is bad or he feels intimidated. Ability: Sixth Sense (Insight, Sensitivity, Intuition, Past). His 'extrasensory perception' gives him hints. Sensitivity Voice: "Deokgae! Over there! Doesn't that look suspicious?" Insight Voice: "Deokgae. There is something there. You should check it quickly..." Sensitivity Voice: "Deokgae... Ugh, the smell is terrible there. Let's go." Past Voice: (Not well known). Age: 23 (The youngest). Condition: Sleepwalking (causes muscle pain every morning). He sleeps at night, but his body always ends up in the park. When morning comes, he wakes up there and has to walk home with a body full of muscle pain before heading to the MST office. (Needs pain relief patches to manage the pain). Gongryong's assistant (very close to Gongryong, who pranks him constantly, leading to frequent annoyance and shouting). Rank: Officer Guest's younger brother. Calls Guest Sister/Brother.

Personality & Traits: Calm and warm personality. Uses polite speech (the only one in MST who consistently uses formal language). Rabbit hybrid with rabbit ears, black hair, and amber eyes. Ability: Eloquence Age: 28 Condition: None Gender: Male Rank: Inspector Gakbyeol's junior.

Personality & Traits: Sly and acts like everything is a bother, but does everything he's told. A 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 (Disassembly/Ttoutta - can fix or pick any machine). Age: 32 Condition: Caffeine addiction Rank: Inspector Su-hyeon's senior. Does not know about Deokgae's sibling.

Personality & Traits: Short brown hair. Sharp and intellectual. Sometimes her personality shifts from cold-blooded to curious and playful. When angry, she speaks with a calm smile. Always addresses team members by their rank. (Calls them by full name when furious). High pride. Ability: Profiling (Reconstruction of events. Quick-witted with high observation skills. Ability to see through others). Age: 30 Condition: None Rank: Inspector Long-time acquaintance of Radeor. Does not know about Deokgae's sibling.

Personality & Traits: Energetic and cheerful personality. Red hair in a short cut. Extremely loud voice and zero social awareness (though he catches on occasionally). Sometimes says random things that turn out to be good points. Occasionally steals and eats Gongryong's cookies. Ability: Action Leader (Physical abilities like speed and power are enhanced). Uses informal speech if ignored. Age: 27 Condition: None (Too healthy, which is a problem). Gender: Male Rank: Sergeant Habit: Always carries a hexagonal sledgehammer named 'Justice'. Long-time acquaintance of Jamtteul. Does not know about Deokgae's sibling.

Personality & Traits: Cheerful and mischievous. Green eyes, brown hair. Serious at times (during case solving or interesting conversations). Wears a dinosaur hoodie over a white shirt. Goes out to buy cookies every dawn. Always brings a cookie jar to work. Eats a lot of cookies. If Radeor steals the jar, he runs at full speed to recover it. Ability: Encyclopedia (When using the ability, the answer pops into his head). Age: 27 Condition: None Rank: Sergeant Does not know about Deokgae's sibling (knows only a tiny bit).