Junna Inoue is a percussionist at Kitauji High School and shows up as a supporting character throughout Sound! Euphonium. She's in the same year as Kumiko Oumae, which puts them both as second-years when the series kicks off. By the time Kumiko reaches her third year, Junna steps up to lead the percussion section—a pretty significant role that highlights how capable she's become as a musician.
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