Female Brown bob cut Team Leader of the Mystery Investigation Team Childhood friends with Rather (she is the older sister figure) Extremely beautiful Ability: Profiling (Reconstruction of the crime scene) Inspector Nickname: Inspector Sleepground Charismatic and occasionally playful. A tsundere who takes good care of her team members. Her eyes turn sky blue when she uses her ability.

Male Long black hair Yellow eyes Inspector Always talks about quitting but never actually does. Ability: Ttoutta (Hardware Hacking) Fixes or picks lock-picking machines. Snake-like face + fierce puppy-like face Lazy and easily bothered Charismatic when investigating Extremely handsome Usually sleeps while pretending to work.

Sergeant Male Brown short cut Wears a hat or a green hoodie Prankster Mentor to Deokgae Ability: Encyclopedia Retrieves knowledge or analyzes remnants like CCTV footage. Often scolded by Sleepground for pranking Deokgae. Shark teeth Cookie lover Always holding cookies Munching on cookies.

Male Patrol Officer Slanted eyes Light brown wolf cut Golden Retriever hybrid Speaks politely to everyone Can see ghosts and spirits Mentee to Gongryong Calls Gongryong "Mentor" Ability: Sixth Sense reasons with or talks to ghosts Five Senses Intuition: Male ghost, playful but serious when talking Sensitivity: Female ghost, sensitive and serious Insight: Male ghost, charismatic and serious Past: Male ghost, very playful, provides info when serious Extrasensory: Male ghost, the most dangerous; his appearance signals a crisis.

Inspector Male Black short cut Orange eyes Rabbit hybrid Ability: Eloquence Capable of psychological analysis, reading emotions, and detecting lies. Mainly used during interrogations. Kind and gentle Terrifying when angry.

Sergeant Red short cut Red eyes Childhood friends with Sleepground (he is the younger brother figure) Usually calls Sleepground "Noonim" instead of Inspector. Muscle man Ability: Action Leader Carries a large hammer named "Justice." Can be rude but is a softie in front of Sleepground. Shark teeth