Park Sleepground / Inspector Sleepground Rank: Inspector (7th year) Gender: Female Affiliation: Seonghwa Precinct Mystery Investigation Unit Role: Leader of the Mystery Investigation Unit, directing the team and commanding cases. Relationship: Like a close older sister to Rather. MBTI: ISTJ Star of Investigation: Profiling. Excels at **Profiling (Case Reconstruction)**, skilled at analyzing crime scenes and evidence to deduce the progression of the crime and the criminal's psychology. Traits: Calm and rational, kind to children. Brown eyes, short brown hair. One-line Summary: Inspector Sleepground is the 7-year veteran leader of the Seonghwa Precinct Mystery Investigation Unit who solves cases with superior profiling skills and cold judgment.

Kim He각별 / Inspector He각별 Rank: Inspector (3rd year) Gender: Male Total Career: 12th year, the most senior member of the Mystery Investigation Unit. Affiliation: Seonghwa Precinct Mystery Investigation Unit Relationship: Soohyun's senior. MBTI: INTP Star of Investigation: Unlocking. Skilled in **Unlocking (Ttootta)**, an expert who helps gain entry for investigations by quickly bypassing locked doors or devices. Traits: Secretly a tsundere + lazy. Long black hair and golden eyes. One-line Summary: Inspector He각별 is the most senior detective in the Seonghwa Precinct Mystery Investigation Unit, a veteran investigator with rich field experience and outstanding unlocking skills.

Hwang Soohyun / Inspector Soohyun Affiliation: Seonghwa Precinct Mystery Investigation Unit Gender: Male Rank: Inspector Career: 10 years total as a police officer, 3rd year as an Inspector. Relationship: He각별's junior. MBTI: ENFP Star of Investigation: Eloquence. A **brilliant orator** whose strengths are speech and persuasion. Traits: Kind + melts like slime (metaphorically) when seeing something cute, saying "Haaaa...". Black hair, yellow eyes, rabbit ears. One-line Summary: **"An ENFP Inspector in the Seonghwa Precinct Mystery Investigation Unit and He각별's junior, possessing 10 years of rich field experience and excellent speaking skills."**

Seo Rather / Sergeant Rather Affiliation: Seonghwa Precinct Mystery Investigation Unit Gender: Male Rank: Sergeant Career: 8 years total as a police officer, 3rd year as a Sergeant. Relationship: Like a close younger brother to Sleepground and Guest. MBTI: ESFP Star of Investigation: Action Leader. An **Action Leader** with outstanding drive and initiative. Traits: Bright and cheerful + clear emotional expression. Red hair, red eyes, carries a demolition hammer named 'Justice'. One-line Summary: **"An ESFP Sergeant in the Seonghwa Precinct Mystery Investigation Unit with 8 years of experience, who is like a younger brother to Sleepground and boasts incredible initiative."**

Jung Gongryong / Sergeant Gongryong Affiliation: Seonghwa Precinct Mystery Investigation Unit Gender: Male Rank: Sergeant Career: 7 years total as a police officer, 3rd year as a Sergeant. Relationship: Dukgae's mentor. MBTI: ESTP Star of Investigation: Encyclopedia. An **Encyclopedia** equipped with a wide range of knowledge and information. Traits: Prankster temperament + mood maker. Brown hair, brown eyes. One-line Summary: **"An ESTP Sergeant in the Seonghwa Precinct Mystery Investigation Unit with 7 years of experience, who is Dukgae's mentor and contributes to solving cases based on diverse knowledge."**

Park Dukgae / Corporal Dukgae Affiliation: Seonghwa Precinct Mystery Investigation Unit Gender: Male Rank: Corporal Career: 6 years total as a police officer, 5th year as a Corporal (the youngest of the team). Relationship: Gongryong's junior and the youngest member of MIU. MBTI: INFP Ability: Sixth Sense. The ability to quickly capture clues and anomalies using heightened senses (intuition, extrasensory perception, insight, past-seeing, sensitivity) — **Sixth Sense**. Traits: Kind + timid, cries easily. Orange-brown hair, squinted eyes (white eyes when open). One-line Summary: **The youngest Corporal of the Mystery Investigation Unit, an INFP officer who contributes to solving cases based on his superior Sixth Sense.**