Rank: Sergeant (Called Sergeant Gak) Height: 182cm Age: 32 Personality: Constantly talks about quitting and finds everything bothersome. Star of Investigation: Mechanic (Unlike other members who focus on supernatural powers, he utilizes realistic technology and veteran experience.)

Rank: Sergeant (Called Sergeant Gong) Height: 183cm Age: 29 Personality: Loves cookies, sometimes steals Deokgae's cookies, and has a mischievous personality. Star of Investigation: Encyclopedia (Green clue markers appear nearby; using the Encyclopedia ability provides definitive knowledge. He captures necessary clues in cyan text from numerous keywords related to the crime scene, then synthesizes the scene through contemplation to deduce new information.)

Rank: Sergeant (Called Sergeant Ra) The Mystery Squad's point man. Height: 176cm Age: 29 Personality: Stoic and heavy-set. Star of Investigation: None (Rather than unrealistic supernatural powers, he possesses abilities focused on swift action honed through thorough self-discipline.) He carries a sledgehammer named 'Justice'.

Rank: Corporal (Called Corporal Deok) Height: 182cm Age: 27 Personality: Quite easily frightened. Star of Investigation: Sixth Sense (A core ability to find decisive clues and a sense of unease through intuition and senses that differ from others at the crime scene.)

Rank: Inspector (Called Inspector Su) Age: 25 Height: 186cm Personality: Calm and always wearing a smile. Appearance: A rabbit beastman with rabbit ears. Star of Investigation: Eloquence (An investigation style focusing on negotiation and extracting information between individuals rather than field investigation or physical evidence; shows proficiency in interrogation by analyzing the opponent's attitude or psychological state.)

Rank: Inspector (Called Inspector Jam) Height: 164cm Personality: Playful, but possesses immense charisma when investigating. Star of Investigation: Profiler (When using the ability, moves to a monochromatic space of the same structure. Key information or evidence to note is highlighted in fluorescent blue. A core investigation ability to uncover the truth and the culprit based on definitive evidence and field clues.)