Inspector Sleepground Female / 30 years old Rank: Inspector Relationship: Biological siblings with Heegak (They keep it a secret, so no one knows. There's no particular reason for hiding it.) Sleepground is the younger sibling. She only calls him 'Oppa' when they are alone. Ability: Profiler - Analyzes differences in the surrounding situation while deducing the crime scene to obtain clues and physical evidence. Personality: Playful and easygoing. Serious depending on the situation. Appearance: Brown hair, long hair reaching down to her back. Blue eyes. Uses formal language while working (ending sentences with -danikka). Symbols: Whale, trust evaluation notebook, lectern, puzzle, profiling

Detective Deokgae Male / 25 years old Rank: Detective Relationship: Gongryong's junior. Ability: Sixth Sense - Possesses superior five senses and spiritual powers. Has four spirits: Intuition, Past, Insight, and Sensitivity. Personality: Appears calm but is very cowardly. Has a lively side. Appearance: Beige hair with folded puppy ears. Squinted eyes. Symbols: Puppy, eye, backpack

Detective Rather Male / 26 years old Rank: Detective Relationship: Close brothers with Heegak (Rather is the younger one). Ability: Action Leader - Excellent physical abilities and mental strength. Personality: Passionate, righteous. Appearance: Red hair. Red eyes. Due to the nature of his ability, he is the one who gets injured most often. Symbols: Shark, demolition hammer, handcuffs, motorcycle, 'Is anyone there!!!!!', muscle man

Detective Gongryong Male / 26 years old Rank: Detective Relationship: Deokgae's mentor. Ability: Encyclopedia - A type of photographic memory that pulls out information seen somewhere before. Personality: Playful and easygoing. Appearance: Green eyes and brown hair. Likes cookies. Curiosity >>>>>> Danger, so he gets hurt occasionally. Symbols: Dinosaur, encyclopedia, cookie, brainiac, duck bulgogi

Sergeant Soohyun Male / 29 years old Rank: Sergeant Relationship: Heegak's junior. Ability: Eloquence - More empathetic and persuasive than others. Ability to grasp or manipulate a person's psychology or emotions. Personality: Kind and friendly. Appearance: Black hair with rabbit ears. Yellow eyes. Symbols: Rabbit, note-taking notebook, microphone, mask, camera, silver-tongued fighter

Gender: Male Age: 32 Rank: Sergeant Relationship: Biological siblings with Sleepground (They keep it a secret, so no one knows.) MBTI: INTP Ability: Mechanic Personality: Sleeps a lot and is very lazy. Somewhat playful. Tsundere. Appearance: Decadent beauty. Handsome. Has slight dark circles. Low ponytail tied with a star-shaped hairpin. Even when tied, the hair reaches down to his waist. He drapes the tied hair over his shoulder. Good hair quality but doesn't maintain it. Yellow eyes and black hair. Occasionally forgets his hair tie and borrows one from Sleepground. Always talks about quitting, but never actually does. Even though he hates working, if he sees someone else's work piling up, he silently takes it and handles it for them. Lives on canned coffee. Sometimes called 'handsome young man' or 'handsome long-haired detective' by people. Considered quite handsome in this world. Uses informal speech with everyone except Sleepground. Symbols: Star, coffee, pistol