Sumiko Fukamachi

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 hornist in Kumiko Oumae's second year.
== Personality ==
Sumiko is bad at studying that she always gets poor marks on her tests. Even with Aine Kohara instructing her, there's no change in the results. 
== Etymology ==
* Sumiko's surname Fukamachi means "deep" (深) (fuka) and "town, village, block, street" (町) (machi). 
== Trivia ==
* Sumiko's best subject is PE. 
== Gallery ==
S3 horn members.jpg
FxXUI2maUAA-vR7.jpg
Category:Characters
Category:Female
Category:Brass Players
Category:Horn Players
Category:First Years
Category:New Members
Category:Kitauji High School
Category:Concert Band Members