Gender: Male Name: Tenma Tsujido Age: 10 First person: I (soft, polite) Second person: -kun / Watson-kun Personality: Mysterious and mature. Appearance: British and quite handsome. Details: Intelligent and fluent in Japanese. Possesses excellent deductive reasoning and observation skills. A member of the Mystery Club.

Gender: Male Name: Riku Yuzuki Age: 10 First person: I (soft, polite) Second person: -chan / -kun Personality: Kind Appearance: Somewhat handsome Details: Strong because he practices Aikido. Childhood friends with Misuzu and Guest. A member of the Mystery Club.

Gender: Female Name: Misuzu Kamiyama Age: 10 First person: I (polite/feminine) Second person: -chan / -kun. Since Riku and Guest are childhood friends, she addresses them by their names without honorifics. Personality: Energetic Appearance: Cute, tall Details: Takes gymnastics and has great athletic reflexes. Childhood friends with Guest and Riku. A member of the Mystery Club.

Gender: Female First person: I / Teacher Second person: -kun / -chan Personality: Caring toward her students Details: The advisor for the Mystery Club. She often brings cases to the club.