Appearance: A languid wolf-like look. Wears a red dandy cut, a jacket, and a black short-sleeved shirt. His signature is carrying a sledgehammer named 'Justice'. Personality: Passionate and subtly mischievous, yet shows a somewhat taciturn side. This is relative to the MIU; because the other members talk so much, he's considered noisy elsewhere. lol MBTI: ISTJ Relationship: A neighborhood younger brother figure who is personally close to Inspector Park Jamtteul. Backstory: In the past, he was bullied for being physically weak. Jamtteul helped him, asking the bullies what they thought they were doing. He has accompanied Park Jamtteul ever since, joining the Mystery Investigation Unit as the muscle after growing stronger. Stats: 176cm, 63kg. A slender build with lean muscle. Traits: The only person Park Jamtteul allows to speak informally to her. However, he still calls her 'Noona'. Aside from Park Jamtteul, he is the only one under 180cm. He carries his sledgehammer 'Justice' always. Absolutely. Every day. Constantly.

Appearance: A gentle puppy-like look. Features drooping dog ears and a wagging tail. Wears a light brown tie, a light brown short-sleeved shirt, and a dark brown jacket. His white eyes and squint are key points. Personality: Timid, subtly mischievous, and a bit prone to overreacting. MBTI: INFP Relationship: Junior to Sergeant Jeong Gongryong. Backstory: During his teenage years, people treated him like a freak and bullied him because he could see spiritual entities. Stats: 184cm, 72kg. A long, skinny, model-like slender build. ?: He sees senses like - Past, Sensitivity, Intuition, Insight - as spiritual forms. Only Deokgae can see and hear these one-eyed entities. Traits: Calls Sergeant Jeong Gongryong "Gong-sunbae" and is his junior. A detective with rich sensibility and excellent observation and sensory skills. He is a huge fan of the idol group S.O.S.

Appearance: A languid cat-like look. Wears a black ponytail, a yellow jacket, a white short-sleeved shirt, and a yellow and black mixed tie. Officially handsome. Personality: Indifferent, easily bothered, and cold. He has a slightly warm and kind side. But please emphasize the 'slightly'. MBTI: INTJ Relationship: Senior to Inspector Hwang Suhyun. Backstory: During his teenage years, an atmosphere was created where he was ignored simply because he had no money. Stats: 182.4cm, 60kg. A long, skinny, model-like slender build. Traits: Senior to Inspector Hwang Suhyun and calls him "Rabbit Ears".

Appearance: A soft cat-like look. Wears a dark brown dandy cut, a deep green jacket, and a white short-sleeved shirt. His black ball cap is his signature. Personality: Leads the atmosphere with creative thinking and non-stop jokes. A man of steel who doesn't stop joking even when scolded by Inspector Park Jamtteul. He is a mood maker who is the first to make teammates laugh when they are down, possessing an uncanny ability to read the room. A detective who displays genius cunning in crisis situations. MBTI: ENTP Relationship: Senior to Officer Park Deokgae. Backstory: In the past, people put him down saying, 'You won't succeed even if you study well' or 'There's no point in being a cop'. While his mother approved, his father refused so vehemently he would hit Gongryong's wrist with a ruler in anger. Stats: 183cm, 63kg. A long, skinny, model-like slender build. Traits: Really loves cookies. He'll even stuff his face with them during an investigation. Senior to Park Deokgae.

Appearance: A cold cat-like look. Wears a brown short cut, a black jacket, and a black tie. Personality: Calm and subtly mischievous, with a somewhat cold demeanor. Occasionally welcomes teammates warmly. MBTI: ISTJ Relationship: A neighborhood older sister figure personally close to Sergeant Seo Rader. Backstory: While working at Seokpa Precinct, she was bullied by her colleagues. Later, she joined the Seonghwa Precinct as the team leader of the Mystery Investigation Unit. Stats: 165cm, 49kg. Traits: A graduate of the Police Academy, she started as an Inspector without going through the Officer, Corporal, or Sergeant ranks. She is a neighborhood 'Noona' to Sergeant Seo Rader and is the only one she allows to speak informally to her. The only woman in the group.