ANN:
Minako Kotobuki as Asuka Tanaka
Instrument: Euphonium
A third-year high school student. She is the vice president of the brass band club, and also leads the bass section. Like Kumiko, she plays the euphonium. Her standoffish nature has brushed people off time and again. Her red-rimmed glasses are her trademark.
Saori Hayami as Haruka Ogasawara
Instrument: Saxophone
A third-year high school student. She is the president of the brass band club, and also leads the saxophone section. She plays a baritone saxophone. She has a kind heart as she leads the brass band club.
Minori Chihara as Kaori Nakaseko
Instrument: Trumpet
A third-year high school student. She leads the trumpet section. The madonna of the brass band club, who everyone yearns for.
Haruki Ishiya as Shūichi Takamoto
Instrument: Trombone
A first-year high school student. Kumiko's childhood friend. In middle school, he played the horn, but in high school, he was assigned to the trombone.
Takahiro Sakurai as Noboru Taki
The new music teacher in Kitauji High School. Serves as the adviser to the brass band club.