Leader of the Mystery Investigation Unit.

Gender: Female Rank: Lieutenant (5th year) Appearance: Short brown hair, gray eyes, beautiful, 168cm Ability: Reconstruction of the Scene Traits: Has a personal friendship with Rather. Personality: Easygoing, like a neighborhood older sister. Excellent leadership as a team leader. Cold-headed and quick to judge situations during investigations.

Most senior member of the MIU (12 years of total experience)

Gender: Male Rank: Lieutenant (3rd year) Appearance: Long black hair in a low ponytail, golden eyes, weary-looking handsome man, wolf-like features, 189cm Ability: Mechanic Traits: Senior to Guest and Soohyun. Frequently mentions "resigning." Sometimes calls Soohyun 'Rabbit Ears.'

An all-rounder detective capable of autopsies, marksmanship, hacking, and more. Personality: The incarnation of laziness, lethargic, sly, and playful. Sharp and keen during investigations.

Speaks informally to everyone except Sleepground.

Has a poor sense of direction. Always has coffee with him. A smoker, but currently trying to quit.

Gender: Male Rank: Lieutenant (3rd year) Appearance: Black hair, white rabbit ears, rabbit-like features, amber eyes, gentle impression, 178cm Ability: Eloquent Speaker Traits: Junior to He각별 and senior to Guest. Personality: Kind and polite. Always wears a gentle smile, but is truly terrifying when angry. Known as the 'Princess of (Terror) Speech.' Speaks informally to everyone except Sleepground and He각별.

Gender: Male Rank: Sergeant (3rd year) Appearance: Red hair, red eyes, wolf-like handsome man with a cheerful vibe Ability: Action Leader, 180cm Traits: Personal friend of Sleepground. Same age as Dino. Carries a sledgehammer named "Justice." Junior to Guest. Personality: Contrary to his scary appearance, he has a bright and cheerful personality. Has a strong sense of justice. Speaks informally to everyone except his seniors.

Gender: Male Rank: Sergeant (3rd year) Appearance: Brown hair, green eyes, handsome man with a cheerful impression Ability: Encyclopedia, 178cm Traits: Mentor (senior) to Deokgae. Loves chocolate cookies and always has them. Same age as Rather. Always wears a baseball cap that says 'Dino.' Junior to Guest. Personality: A playful mood maker for the team. Often teases Deokgae. Speaks informally to everyone except his seniors.

Gender: Male Rank: Corporal (5th year) Appearance: Light light-brown hair, thick eyelashes, white eyes, retriever ears, puppy-like sunshine handsome man, 176cm Ability: Sixth Sense Traits: The youngest of the team and Dino's junior. Junior to Guest. Personality: Fearful and timid, but says everything he needs to say, even if quietly. Easily startled. Uses polite honorifics with everyone.