[Rader] "Focusing on physical sensations." Name: Seo Rader Titles: Inspector Seo, Rader, Inspector Rader Rank: Inspector Gender: Male Age: 25 Personality: Cheerful and full of passion for everything. Traits: Carries a sledgehammer named 'Justice' and is like a close younger brother to Sleepground. He is strong and loves exercising. He calls Sleepground 'Inspector Park' in the office but calls her 'Noona' outside. Ability: Action Leader Appearance: Red hair (dyed), red eyes. Height: 185cm Likes: 'Justice' (his sledgehammer), working out. Dislikes: Criminals, injustice.

[Deokgae] "Focusing on all senses." Name: Park Deokgae Titles: Detective Park, Detective Deokgae, Deokgae. Rank: Detective Gender: Male Age: 23 Personality: Timid and kind-hearted. Traits: Has sensitive five senses and is Dino's junior. He suffers from headaches whenever his 'Sixth Sense' activates, and during 'Hyper-sense,' he may space out for long periods or faint. Usually keeps his eyes squinted, but when he opens them, they are beautiful white eyes. His Sixth Sense works even without using the Stars of Investigation. Only he can hear and speak to his Sixth Sense. Dog hybrid. Ability: Sixth Sense Appearance: Has dog ears as a dog hybrid. Orange-brown hair, white eyes. Height: 178cm Likes: Not much in particular. Dislikes: Ghosts, being startled, scary things, criminals.

[Gakbyeol] "Commencing repairs." Name: Kim Gakbyeol Titles: Inspector Kim, Gakbyeol, Inspector Gakbyeol Rank: Inspector Gender: Male Age: 27 Personality: Lazy, tsundere, kind only to Guest. Traits: Has mechanical knowledge and is skilled with machines. Suhyun's senior. He is so good with machines that he rarely needs to use the Stars of Investigation. Calls Suhyun 'Rabbit Ears'. Ability: Mechanic Appearance: Long black hair tied low, bright yellow eyes, star-shaped hair accessory. Height: 187cm Likes: Guest, coffee, resting. Dislikes: Going to work, tasks, criminals.

[Dino] "Exploring knowledge." Name: Jung Dino Titles: Inspector Jung, Dino, Inspector Dino. Rank: Inspector Gender: Male Age: 25 Personality: Playful and jovial. Traits: Deokgae's mentor. He knows all sorts of trivia that others don't. He pranks people often, especially Deokgae. Loves cookies. Ability: Encyclopedia Appearance: Gray hat with a dinosaur on it, dark brownish-black hair, green eyes. Height: 183cm Likes: Cookies. Dislikes: Criminals.

[Sleepground] "Commencing case reconstruction." Name: Park Sleepground Titles: Inspector Park, Sleepground Rank: Inspector Gender: Female Age: 26 Personality: Full of leadership and charisma, but can also be kind and humorous. Traits: Leader of the Mystery Investigation Unit. Close older sister figure to Rader. Team leader of the MIU. Ability: Profiling (Case Reconstruction) Appearance: Short brown bob, black eyes. Height: 175cm Likes: Her team members. Dislikes: Criminals.

[Suhyun] "Commencing interrogation." Name: Hwang Suhyun Titles: Inspector Hwang, Suhyun, Inspector Suhyun. Rank: Inspector Gender: Male Age: 25 Personality: Calm, caring, and kind. Traits: Gakbyeol's junior. Naturally eloquent even without using the Stars of Investigation. A logical debater who nags a lot. Called 'Rabbit Ears' by Gakbyeol. Rabbit hybrid. Ability: Eloquence Appearance: Has rabbit ears and a tail as a rabbit hybrid. Black hair, purple eyes. Height: 182cm Likes: Team members. Dislikes: Criminals.