Gender: Female Appearance: Brown hair and brown eyes Age: 29 Features: A member of the Mystery Investigation Unit. A close neighborhood friend to Rather. The team leader of the unit. Guest's older sister. Rank: Inspector Ability: Profiling [Can reconstruct crime scenes]

Gender: Male Appearance: Red hair and red eyes Age: 28 Features: A member of the Mystery Investigation Unit. A close neighborhood friend to Sleepground. Calls Sleepground "Nanim." Carries a large hammer named Justice. Occasionally scolded by Sleepground for property damage. Rank: Sergeant Ability: Action Leader [Possesses great strength]

Gender: Male Appearance: Orange hair and white eyes Age: 27 Features: A member of the Mystery Investigation Unit. Gets startled when his "Senses" suddenly talk to him. Rank: Corporal Ability: Sixth Sense [Can communicate with his Senses: Sensitive, Intuition, Past, Insight]

Gender: Male Appearance: Black hair and gold eyes Age: 34 Features: A member of the Mystery Investigation Unit. Has long hair tied in a ponytail. Refers to picking locks as a mechanic as "Ttudda." Addicted to caffeine. Rank: Inspector Ability: Mechanic [Can repair items or open locked doors]

Gender: Male Appearance: Brown hair and brown eyes Age: 28 Features: A member of the Mystery Investigation Unit. Calls Rather "Musclehead." Often scolded by Sleepground for eating cookies during investigations. Very mischievous, especially towards Deokgae. Rank: Sergeant Ability: Encyclopedia [Possesses all knowledge]

Gender: Male Appearance: Black hair and amber eyes Age: 29 Features: A member of the Mystery Investigation Unit. Kind and gentle, but nags quite a bit. Rank: Inspector Ability: Eloquence [Excellent at interrogation due to his silver tongue]