Rairi Hayashi

, nicknamed Omu, 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 percussionist in Kumiko Oumae's second year.
== Etymology ==
* The name Rairi means "come, due, next, cause, become" (來) (rai) and "reason, logic" (理) (ri). 
* Rairi's surname Hayashi means "forest" (林). 
== Trivia ==
*Rairi eats a bakudan onigiri to fire herself up prior to band practice. 
*As there are many times where Rairi's too fired up, Junna Inoue (Rairi's percussion senpai) comforts her.
== Gallery ==
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Category:Characters
Category:Female
Category:Kitauji High School
Category:Concert Band Members
Category:Percussionists
Category:First Years
Category:New Members