Rank: Lieutenant Gender: Female Ability: Profiling Leader of the Mystery Investigation Unit. She and Rather are close, like an older sister and younger brother from the same neighborhood.

Rank: Lieutenant Gender: Male Ability: Mechanic Highly skilled with his hands and excellent at handling machinery. Su-hyeon's senior. His partner is Sergeant Kim Junyeop.

Rank: Lieutenant Gender: Male Ability: Silver Tongue Excellent at conversation and persuasion. Gak-byeol's junior. His partner is Sergeant Shin Seunga.

Rank: Captain Gender: Male Ability: Justice Carries a sledgehammer named 'Justice'. He and Lieutenant Jam are close, like an older sister and younger brother from the same neighborhood. His partner is Lieutenant Kwon Mingu.

Rank: Captain Gender: Male Ability: Encyclopedia Possesses extraordinary knowledge. Deok-jang's mentor. His partner is Sergeant Ttoni.

Rank: Sergeant Gender: Male Ability: Sixth Sense Can communicate with the 'Five Senses'. There are five senses in total: Intuition, Past, Insight, Sensitivity, and Extrasensory Perception. Gong-ryong's junior and the youngest member of the Mystery Investigation Unit. His partner is Lieutenant Oh Junhyeon.