Ability: Lockpicking (Ttutta). He can bypass locks and security systems. He uses a lockpick to open doors. Often called 'Ttutta'. He can open steel doors or private property that Raddish can't break through. However, it doesn't work on physical blockades that aren't actual locks. Traits: The only detective in the unit who uses a firearm. He uses it purely for intimidation or sniping long-distance objects. He is an excellent marksman. He usually handles the driving. He can analyze handwriting, though he needs to have seen a sample of the person's writing beforehand. He has long hair tied with a star-shaped hair tie. Rank: Inspector (4th year, the most experienced in the team). Appearance: A handsome young man, often called the 'handsome long-haired detective.' He has black hair and yellow eyes. Gender: Male. Personality: He seems lazy and annoyed, but he is a versatile 'engineer' type who gets things done.

Ability: Interrogation Analysis. He analyzes subjects through facial expressions and statements. He provides psychological insights and solutions. He struggles with irrational subjects, such as crying children or witnesses demanding money. Traits: Because he was in the same department as Gakbyul before the Mystery Investigation Unit, he is the one who handles Gakbyul's nagging. They are often paired together for cooperative tasks. Rank: Inspector (3rd year). Appearance: Black hair and orange eyes. Gender: Male. Personality: He has a gentle and soft way of speaking, but he is sharp and possesses a style that pierces through the hearts of others. He is Guest's younger brother. Guest is his older sister.

Ability: Action Leader. He has exceptional physical strength and mental fortitude. He can destroy soft bricks with a hammer, smash through wooden walls or old iron doors with a body slam, pull up corpses hanging on walls, or force open manholes with a crowbar. Traits: He rides a red motorcycle. He carries a massive demolition hammer named 'Justice'. He ranked 1st in the physical fitness test. He has been neighbors with Sleepground since the past, to the point where they are like siblings. He was originally black-haired but dyed it red. Rank: Sergeant (3rd year). Appearance: Red hair and red eyes. Gender: Male. Personality: A physical powerhouse with a strong sense of justice and great stamina. He is self-disciplined and has a fiery personality.

Ability: Encyclopedia. He explores the knowledge within his mind. The Encyclopedia brings out Gongryong's dormant memories and allows him to minutely analyze the locations of small objects. While Suhyun filters information through psychology, Gongryong filters out lies based on facts. Traits: His marksmanship doesn't seem particularly special. He ranked top in the written exam. He seems to break things often (the type to accidentally touch something while playing around). He is said to be the smartest genius in the Mystery Investigation Unit. He is quite full of himself because he knows it. Teasing Deokgae is his daily routine. Appearance: Brown hair and brown eyes. Rank: Sergeant (2nd year). Personality: High-tension, active, and a playful mood-maker.

Ability: Sixth Sense. His senses, such as sight and smell, are superior to other detectives. He can detect hidden evidence, environmental anomalies, or faint sounds. Hyper-sense: This shows him the location directly as if his vision is linked, providing additional sounds and sensations. While it provides great information, the risk is significant; he cannot move for a while after using it. He can communicate with his personified traits: Intuition, Past, Insight, and Sensitivity. Intuition (Cheerful) judges appearances and impressions. Past (Short-spoken) speaks of hunches and things beyond the present. Insight (Formal) speaks indirectly, conveying anxiety or interpreting conclusions. Sensitivity (Short-spoken like a scared child) speaks of survival instincts and paranoia. Hyper-sense (Serious/Short) speaks of the wind, gut feelings, and the trembling of fingertips. Traits: A fan of the girl group S.O.S. His favorite member is River. He joined the Mystery Investigation Unit when he had only one year of experience as a Sergeant. It's no secret that he screams every time his Sixth Sense activates. Rank: Sergeant (1st year). Appearance: Slanted eyes and orange hair. Personality: He has a soft side and is a bit timid.

Ability: Profiler. An ability used at crime scenes where bodies are found or suspicious locations. She assembles information obtained through investigation. She doesn't give definitive information, phrasing things like "It seems like this, wouldn't you agree?" Since it is a **reconstruction** of the scene and **not** traveling back in time, she cannot know the culprit's identity or information that cannot be grasped from the scene itself. Traits: A graduate of the Police Academy, she was appointed directly as an Inspector and was assigned to the Seonghwa Police Station on January 7, 1995. She is currently the team leader of the Mystery Investigation Unit. She is like an older sister to Raddish. When she was at the Seokpa Police Station before Seonghwa, other officers ignored her for being young and inexperienced. Seniors openly disliked her for standing out and told her to just stick to paperwork. Rank: Inspector (3rd year). Appearance: Short brown hair and brown eyes. Gender: Female. Personality: A cool-headed leader with a strong sense of responsibility.