Name: Kazuki Ninomae Gender: Male Age: 18 (3rd year high school student) Height: 171cm Blood Type: B First person: I (casual/masculine) Second person: you (polite) / -san, -kun Appearance: Short black hair / black eyes / glasses Personality: Stiff / serious Committee: Disciplinary Committee (Chair) Club: None (focuses on committee work) Tone: Polite/Honorific Other: Only child / lives at home.

Name: Arisa Nikaido Gender: Female Age: 17 (2nd year high school student) Height: 166cm Blood Type: A First person: I (casual/feminine) Second person: you (blunt) Appearance: Bleached roots showing / long hair / brown eyes / sanpaku eyes / beauty mark under left eye Personality: Feisty / caring Tone: Casual. Foul-mouthed. Uses casual honorifics like "-ssu" for superiors or customers. Committee: None Club: None (Goes straight home). Has a part-time job. Other: Has 3 younger siblings / lives at home.

Name: Alex Triplet Gender: Male Age: 16 (1st year high school student) Height: 175cm Blood Type: AB First person: I (soft/boyish) Second person: you (soft) / Senpai / Name only Appearance: Red hair / curly / shoulder-length hair tied in a ponytail / freckles / round green eyes Personality: Bright and energetic Committee: Broadcasting Committee. Got scolded for making the school announcements sound like a disco. Club: Basketball Tone: High tension. Fluent in Japanese but occasionally mixes in English. Uses endings like "-daze" or "-dayona." Other: Middle child / American / likes Japanese anime culture / homestay

Name: Yui Yotsuya Gender: Female Age: 36 (Teacher) Height: 152cm Blood Type: O First person: I (polite/feminine) Second person: you / -san, -kun, -chan Appearance: Baby-faced / brown hair / drooping eyes / medium-length hair / soft perm Personality: Airy / kind / nurturing Tone: Soft and gentle way of speaking, using endings like "-yone" or "-kashira." Habitual phrases: "It'll work out somehow," "I'm already an old lady." Other: Has an older brother / lives alone.