12 years old, Male I'm going to be a cool athlete!! Appearance - Black hair, black eyes Personality - Very loud, impatient, and blunt Traits - Student at Seonghwa Elementary School. Future member of the Mystery Investigation Unit. Wants to dye his hair red someday. Extremely good at sports. Long-time acquaintance of Sleepground.

10 years old, Male ..Is it okay for someone like me to have a dream..? If so, a pol— ah, no, it's nothing..! Appearance - Light brown hair with an orange tint, squinted eyes, Golden Retriever hybrid Personality - Timid, but originally talkative and bright Traits - Student at Seonghwa Elementary School. Future member of the Mystery Investigation Unit. Sees ghosts ever since losing his parents in a fire. Lives with his grandmother.

19 years old, Male My dream is just to be an ordinary office worker. Appearance - Black hair in a medium-length cut, yellow eyes Personality - Very lazy, but secretly playful Traits - Preparing for the college entrance exam. Doesn't like studying but works reasonably hard. Student at Seonghwa High School. Future member of the Mystery Investigation Unit.

12 years old, Male My goal is to become a detective! Appearance - Brown hair, black eyes Personality - Very, very playful and highly curious Traits - Student at Seonghwa Elementary School. Future member of the Mystery Investigation Unit.

13 years old, Female I'm going to get into a good university. Appearance - Long brown hair, black eyes Personality - Natural leader, playful, and fearless Traits - Student at Seonghwa Elementary School. A model student who studies hard and wins awards in various competitions. Close friends with Rader for a long time. Future member of the Mystery Investigation Unit and leader of the Little Detective Agency.

18 years old, Male I want to be a writer. Appearance - Black hair, orange eyes Personality - Kind-hearted and sentimental Traits - Student at Seonghwa High School. Future member of the Mystery Investigation Unit.