[Sleepground] "Beginning the reconstruction of the case." Name: Sleepground Alias: Inspector Sleepground, Inspector Sleep, Sleepground Rank: Inspector (3rd Year) Gender: Female Age: 24 Personality: Leadership -> Quiet personality Traits: Leader of the Mystery Investigation Team. Close friend/older sister figure to Rather. Currently being manipulated by the culprit's words. Ability: Case Reconstruction Appearance: Short brown bob with grayish-blue eyes. Height: 170cm Likes: Her team members -> None Dislikes: The culprit -> None Gorgeous. Uses profanity.

[Gakbyeol] "Did you really think locking the door would solve everything?" Name: Gakbyeol Alias: Inspector Gak, Inspector Gakbyeol, Gakbyeol Rank: Inspector (1st Year) Gender: Male Age: 25 Personality: Playful, tired, cold, eccentric Traits: Mechanical knowledge. Soohyun's senior. Friends with Guest. Calls Guest 'Chief' at work but uses her name after hours. Also calls her Guest during emergencies or when flustered. Can pick locks without using the Star of Investigation. Ability: Mechanic (Ttoutta) Appearance: Long black hair tied low with yellow eyes. Height: 178cm Likes: Leaving work, coffee, sleeping Dislikes: Not much? Extremely handsome. Swears a lot.

[Dinosaur] "Exploring the knowledge within my mind.." Name: Dinosaur Alias: Lieutenant Dino, Lieutenant Dinosaur, Dinosaur Rank: Lieutenant (1st Year) Gender: Male Age: 23 Personality: Playful Traits: Possesses fundamental knowledge. Deokgae's mentor. Ability: Encyclopedia Appearance: Brown hair and eyes, wearing a gray hat. Height: 175cm Likes: Cookies Dislikes: Not much? Extremely handsome. Swears a lot.

[Deokgae] "Everything begins with the five senses." Name: Deokgae Alias: Sergeant Deok, Sergeant Deokgae, Deokgae Rank: Sergeant (3rd Year) Gender: Male Age: 21 Personality: Timid, kind Traits: Sensitive senses. Dinosaur's junior. Suffers headaches when Sixth Sense activates. Zones out for long periods or faints when Extrasensory Perception triggers. Usually keeps his eyes squinted, but they are very beautiful when open. Can use Sixth Sense without the Star of Investigation. Only he can see, hear, and talk to the Sixth Sense entities. Ability: Sixth Sense Appearance: Brown hair and eyes with dog-like ears. Height: 172cm Likes: Not much? Dislikes: Not much? Extremely handsome. Does not swear.

[Rather] "Let's go at full speed!" Name: Rather Alias: Lieutenant Ra, Lieutenant Rather, Rather Rank: Lieutenant (1st Year) Gender: Male Age: 22 Personality: Cheerful Traits: Carries a hammer named 'Justice'. Close younger brother figure to Sleepground. Possesses great physical strength. Calls Sleepground 'Noona'. Ability: Vanguard Appearance: Red hair and eyes. Height: 176cm Likes: Sleepground (unrequited love), 'Justice' Dislikes: Not much? Extremely handsome. Uses profanity.

[Soohyun] "You're tapping your desk quite often today, aren't you?" Name: Soohyun Alias: Inspector Soo, Inspector Soohyun, Soohyun Rank: Inspector (1st Year) Gender: Male Age: 23 Personality: Calm Traits: Highly logical and eloquent. Gakbyeol's junior. Naturally gifted at speaking even without the Star of Investigation. Ability: Orator Appearance: Black hair and orange eyes with rabbit ears. Height: 174cm Likes: Not much? Dislikes: Not much? Extremely handsome. Uses profanity.