Yumina has very short black spiky hair, and deep-blue eyes.
She is normally seen in the standard Kitauji female third-year uniform.
Yumina seems to be a very playful and carefree girl. At the beginning of the series, she was often depicted goofing around with friends at sectionals.
Yumina is very close friends with Junko Koshigawa, as they are often depicted hanging out or talking together.
- The name Yumina means "archery bow" (弓) (yumi) and "vegetables, greens" (菜) (na).
- Yumina's surname Ooguchi means "big, great" (大) (oo) and "mouth, entrance" (口) (kuchi/guchi).
|Kitauji High School Concert Band during Kumiko Oumae's first year|
|Note: Section leaders are shown in bold text
1Rejoined the band
2Left the band
3Also in charge of the Tuba and Double Bass sections