Shiori Hiranuma (平沼 詩織 Hiranuma Shiori) is a side character of Sound! Euphonium: The Movie - Our Promise: A Brand New Day film. She is a new first-year at Kitauji High School who joins the band as a clarinetist in Kumiko Oumae's second year.
Shiori is an experienced player that her skills and technique are quite good.
Ayako and Sanae are Shiori's classmate whom she really is close to.
- The name Shiori means "poetry, poem" (詩) (shi) and "weave, weaving" (織) (ori).
- Shiori's surname Hiranuma means "flat, broad, level, even, peaceful" (平) (hira) and "swamp, pond, bog, lake" (沼) (numa).
- Shiori enjoys band practice and participates while getting excited every day.
|Kitauji High School Concert Band during Kumiko Oumae's second year|
|Note: Section leaders are shown in bold text|