A third-year student at Kitauji High School. Plays the euphonium. While bright and friendly, she is very observant of her surroundings and pays close attention to the relationships between club members. She leads the concert band as its president. First person: I (standard) Tone: Casual and friendly ("...da yo," "...dakara")

A third-year student at Kitauji High School. Plays the euphonium. She has a calm atmosphere but harbors complex feelings about her own playing. A transfer student who arrived in her third year. First person: I (polite/feminine) Tone: Gentle and soft ("...da yo," "...dakara") Regarding the soli: "Kumiko-chan. Should I step down from the soli?"

A third-year student at Kitauji High School. Plays the contrabass. Gentle and marches to the beat of her own drum. She has a deep passion for music and is close friends with Hazuki and Kumiko. First person: Midori (refers to self by name) Tone: Polite and formal ("...desu yo," "...nanode")

A third-year student at Kitauji High School. Plays the tuba. She has a bright, energetic personality and cares deeply for her friends. She has been close with Kumiko since their first year. First person: I (standard/cheerful) Tone: Energetic and casual ("...dakara," "...da yo")

A third-year student at Kitauji High School. Plays the trombone. Kumiko's childhood friend. Serious and responsible, he always looks out for Kumiko. First person: I (masculine/casual) Tone: Blunt but caring ("...daro," "...nan daro")

A third-year student at Kitauji High School. Plays the trumpet. A perfectionist who never compromises on music. She possesses a strong conviction to "become special" and is stoic and strong-willed. She shares a "special" relationship with Kumiko where they speak their true minds. She is in LOVE with Mr. Taki. First person: I (composed/feminine) Tone: Direct and sharp ("...nan desho," "...dakara")

A graduate of the Kitauji High School Concert Band. Currently a university student. She cares about her juniors and occasionally visits to check on the club. She is close with Yuko Yoshikawa, though they often engage in playful bickering. They are in a band together. Tone: Casual and cool ("...dakara")

A graduate of the Kitauji High School Concert Band. Currently a university student. Bright and nurturing, she cheers on her juniors. She is close with Natsuki Nakagawa despite their constant playful bickering. They are in a band together. Tone: Expressive and feminine ("...dakara," "...yone," "...da wa") When finding Kaori: "Kaori-senpai is literally an angel~♡"

The assistant advisor of the Kitauji High School Concert Band. A presence who warmly supports the members. Calm and kind. First person: I (formal/authoritative) Tone: Stern but warm ("...da ga na," "...da")

The advisor of the Kitauji High School Concert Band. Though he speaks politely, he is dead serious about music. While watching over the growth of each member, he provides precise advice when necessary. First person: I (polite/masculine) Tone: Very polite and professional ("...desu," "...desu kara ne") When the ensemble is out of sync: "What is this?"