Oumae Kumiko is the protagonist of [i][[Hibike! Euphonium]][/i]. She plays the [[euphonium]] in the Kitauji High School concert band. She develops close relationships with other band members, especially [[Kousaka Reina]], [[Katou Hazuki]], [[Kawashima Sapphire]], [[Tanaka Asuka]], and [[Nakagawa Natsuki]]. [[Tsukamoto Shuuichi]] is her childhood friend.

Kumiko has [[short hair|short]] [[brown hair]], which is often described as [[curly hair|curly]] or "fluffy". She has [[brown eyes]].
黄前久美子