Sound! Euphonium — Characters & Cast

Initially seeks an easy, low-stakes routine, but evolves into a passionate pursuit of excellence and the desire to guide Kitauji to national gold.

Starts as a guarded, detached teenager who joined Kitauji to escape bad memories. Across three seasons, Kumiko evolves into a fiercely dedicated musician and a selfless club president capable of placing the ensemble's integrity above her own pride.

Desires to become extraordinary and refuse mediocrity at all costs, while proving her worth to mentor Noboru Taki.

Unapologetically uncompromising from the start, Reina challenges Kitauji's complacency. Over time, she learns to channel her fierce individualism into constructive drum major leadership while maintaining her intense artistic bond with Kumiko.

Plays the euphonium so that her sound might reach her estranged father, who is an acclaimed professional musician and competition judge.

Shields her personal grief and family pressures behind a facade of theatrical cheerfulness and technical brilliance. In Season 2, her personal crisis challenges the club and Kumiko directly, leading Asuka to finally reveal her sincere love for the euphonium before passing the torch.

To build a nationally competitive band founded on genuine artistic discipline and fulfill his late wife's dream.

Arrives as an affable yet unyielding new advisor. Behind his polite smile lies unwavering commitment to high musical standards, honoring a promise made to his late wife while forcing the students to mature through autonomous choice.