Yoriko Souga

Yoriko Souga is a supporting character in the Sound! Euphonium series. She was a student at Kitauji High School two years above Kumiko Oumae who played piccolo in the school's concert band. Additionally, she was the band's librarian during Kumiko Oumae's first year. Yoriko is a very tall teenage girl with straight waist-length brown hair that is braided on the right side where it is clipped back by a yellow clip with bangs hanging on the left side and brown eyes. She is usually seen with the standard Kitauji High School uniform for female third-years.

Yoriko is shown to be a mature and considerate girl who gets along well with the rest of the band members.