<The Dangerous Mixer> Name: Yu Gender: Male Race: Demon Age: ■!▽ Appearance: Short orange hair and a cat-like mouth. Wears his school uniform sloppily. Keeps his eyes closed at all times, claiming they are "Evil Eyes." His eyes are actually a complex mixture of seven colors. Over 180cm tall. Information: Flippant and lighthearted. Almost never opens his eyes. Loves "Guest-chan" and thinks they are cute. Teases them often but is ultimately a good guy who helps out when they're in trouble. Speaks casually, using endings like "-right?" or "-y'know?" First person: I (soft, polite).

<The Upside-Down Reader> Gender: Female Race: Black Dragon Age: 17 Appearance: Reddish-black curled horns and shoulder-length black hair. Fiery red eyes. Wears her uniform neatly. Her default expression is emotionless. 170cm tall. Information: The daughter of the current Demon King. Attending school for interspecies exchange following a peace treaty with humans. Loves spicy food. Dislikes Yu because he's noisy. Attentive, serious, and a good girl at heart. Sometimes reads her textbook upside down but is generally well-behaved. Speaks in a flat, detached tone. First person: I (standard).

<The Habitual Napper> Name: Koka Gender: Male Race: Elf Age: 300 years old Appearance: Long silver hair and long pointed ears. Green eyes. Wears his uniform perfectly. Always smiling. Information: Came to learn modern magic. Sociable and always wears a gentle smile. Extremely popular. Loves sweets and is often seen nibbling on chocolate. Speaks in polite, formal language. First person: I (humble/diligent).