Gender: Female Age: 30 Affiliation: Mystery Investigation Unit Rank: Lieutenant (Team Leader) Titles: Team Leader, Lt. Sleepground Pet: Dozens of sky-blue sardines (can live without water) They move as if they are a single organism. They move by swimming through the air. Height: 168cm Appearance: Brown bob cut, black eyes Outfit: Black jacket over a sky-blue shirt, jeans Personality: Calm, cautious, and charismatic. However, she has a playful side, is surprisingly clumsy, and shows a human touch. Ability: Profiling Features: As the leader of the Mystery Investigation Unit, she leads the team well. The most famous profiler in the country. Her pet sardines assist in profiling and help build hypotheses. Their name is Hysis (short for hypothesis). Relationship: She has a personal history with Rather since childhood, like siblings (Sleepground is the older sister).

Gender: Male Age: 28 Affiliation: Mystery Investigation Unit Rank: Sergeant Titles: Sgt. Rather Pet: A red-furred dog the size of a medium breed (German Shepherd) Height: 185cm, sturdy build Appearance: Red short cut, red eyes, somewhat tough-looking features Outfit: Black training gear, red pants Personality: Cheerful and loud. Full of energy, cannot stand injustice, and possesses a strong sense of justice. Ability: Action Leader (Ability to rapidly boost physical capabilities for a short time) Features: The powerhouse of the unit with the highest physical stats. Carries a hammer named 'Justice'. His pet dog helps him run through scenes or apprehend criminals. Its name is Rycher (short for righteous). Relationship: Has a personal connection with Sleepground (calls her 'Noonim').

Gender: Male Age: 31 Affiliation: Mystery Investigation Unit Rank: Lieutenant Titles: Lt. Soohyun Pet: A purple snake (non-venomous) Height: 186cm Appearance: Black short cut, yellow eyes, rabbit ears (Rabbit Beastman) Outfit: Purple jumper over a white shirt, black pants Personality: Kind, gentle, and sweet to everyone. However, he is the scariest when angry. A bit of a nagger. A 'Mouth Fighter' (extremely good at arguing). Ability: Orator (Can distinguish whether the opponent's words are true or false; the power of eloquence) Features: As an orator, his speaking skills are incredible. His pet snake assists in interrogations (it is very good at detecting lies). Its name is Otory (short for oratory). Relationship: Gakbyeol's junior.

Gender: Male Age: 33 (The oldest) Affiliation: Mystery Investigation Unit Rank: Lieutenant Titles: Lt. Gakbyeol Pet: A yellow octopus (can live without water) Usually sits on Gakbyeol's head. Height: 183cm Appearance: Black ponytail, gold eyes, looks exhausted from fatigue Outfit: White shirt, yellow tie, beige coat, black pants Personality: The epitome of laziness. Finds everything bothersome and is a caffeine addict. However, he gets his work done properly. Constantly talks about resigning. Ability: Mechanic (Ability to handle machinery, such as repairs) Features: A bit of an eccentric. Occasionally cracks absurd jokes. His pet octopus carries tools or helps when he uses his ability. Its name is Vice (short for device). Relationship: Soohyun's senior (calls Soohyun 'Rabbit Ears').

Gender: Male Age: 28 Affiliation: Mystery Investigation Unit Rank: Sergeant Titles: Sgt. Gongryong Pet: A green squirrel Height: 181cm Appearance: Brown short cut, green eyes Outfit: Beige jacket over a green hoodie, black pants Personality: Sly and very playful. A witty mood maker. However, he knows how to respect boundaries. Ability: Encyclopedia (Knows all knowledge, including trivial facts) Features: The best brain in the team. Top-tier intellect. Really loves cookies. His pet squirrel stores knowledge in the form of acorns and brings them out when Gongryong needs them. Name: Ruth (short for truth). Relationship: Deokgae's mentor (teases Deokgae often).

Gender: Male Age: 26 (The youngest) Rank: Corporal Titles: Cpl. Deokgae, Maknae Pet: Four small birds in orange, yellow, sky-blue, and purple Height: 178cm Appearance: Light brown short cut, squinted eyes (white eyes when open), puppy ears (Retriever Beastman) Outfit: Brown coat over an orange hoodie, jeans Personality: Timid and easily frightened. Not extremely shy, but he reports exactly what he sees and hears. Often bickers with Gongryong. Ability: Sixth Sense (Abnormally sharp five senses and other perceptions; supernatural ability) Features: Can see ghosts and things others cannot see or hear. His pet birds each inform Deokgae of information or evidence he might miss. Orange bird: Intuition Sky-blue bird: Past Purple bird: Insight Yellow bird: Sensitivity Features: Gongryong's apprentice.