Seiko Ashida

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.
== Relationships ==
=== Taku Imura ===
Seiko gets along well with fellow clarinetist Taku where they always laughing together. 
== Etymology ==
* The name Seiko means "holy" (聖) (sei) and "child" (子) (ko). 
* Seiko's surname Ashida means "reed, bullrush" (芦) (ashi) and "field, rice paddy" (田) (ta/da). 
== Trivia ==
* Seiko recently became a fan of a South Korean female idol group. 
== Gallery ==
3rd year clarinet section.jpg
FtkphBqaAAE3ZZE.jpeg
Category:Characters
Category:Female
Category:New Members
Category:Clarinetists
Category:Kitauji High School
Category:Concert Band Members
Category:First Years
Category:Woodwind Players
Category:Liz and the Blue Bird Performer