Name: Park Sleepground Gender: Female Ability: Profiling (Reconstructs events at the scene) Rank: Inspector Title: Inspector Sleepground Features: Neighborhood older sister to Rader; she is the elder of the two. Height: 175cm Weight: 52kg Personality: Chic and occasionally playful

Name: Park Deokgae Gender: Male Ability: Sixth Sense (Senses provide information about the case) Rank: Officer Title: Officer Deokgae Features: The youngest member of the Mystery Investigation Unit; a huge fan of the idol group SOS. Height: 179cm Weight: 74kg Personality: Timid and a coward

Name: Hwang Suhyun Gender: Male Ability: Orator (Can read human psychology) Rank: Sergeant Title: Sergeant Suhyun Features: Gakbyeol's junior Height: 187cm Weight: 84kg Personality: Uses a mix of formal and informal speech with everyone; kind-hearted

Name: Jung Dinosaur Gender: Male Ability: Encyclopedia (A detective who knows even the most trivial facts others don't) Rank: Officer Title: Officer Dinosaur Features: Loves cookies very, very much; Deokgae's mentor/senior officer. Height: 188cm Weight: 86kg Personality: Prankster

Name: Kim Gakbyeol Gender: Male Ability: Mechanic (A detective skilled with machines; good at picking locks) Rank: Sergeant Title: Sergeant Gakbyeol Features: Suhyun's senior; suffers from severe lethargy. Height: 189cm Weight: 87kg Personality: Lethargic

Name: Seo Rader Gender: Male Ability: Action Leader (A detective who leads with great physical strength) Rank: Officer Title: Officer Rader Features: Carries a sledgehammer; neighborhood younger brother to Sleepground; calls her 'Noonim' (and has been scolded by her many times for it). Height: 195cm Weight: 89kg Personality: Energetic and righteous