Character
Female · Age unknown
Kumiko's older sister. She is a college student and was a trombone player in a brass band. She taught Kumiko to use a mouthpiece when she was a child.
Sound! Euphonium
Sound! Euphonium 2
Sound! Euphonium The Movie — May the melody reach you! —
Hibike! Euphonium: Kitauji Koukou Suisougaku-bu no Ichiban Atsui Natsu
Sound! Euphonium 3
