Mamiko Oumae (黄前 麻美子 Ōmae Mamiko) is a side character in the Hibike! Euphonium series. She is the daughter of Kentarou Oumae and Akiko Oumae and the older sister of Kumiko Oumae who is the one of the reasons behind Kumiko's interest in playing brass instruments.
Compared to Kumiko Oumae, Mamiko sports lighter brown hair and burgundy eyes, but they both have wavy hair, though Mamiko's is less wavy and is longer. She has brown-reddish eyes, which is inherited from her father.
She is usually seen with makeup and she is often dressed in a baggy sweater-like top and a brown skirt.
Mamiko barges in Kumiko Oumae's room on occasion to check up on the latter, much to the younger sister's chagrin.
At the beginning of the anime, Mamiko finds out that Kumiko Oumae has not only changed her hairstyle into a ponytail but that she's considering giving up on playing brass instruments for good. She visits her younger sister to hear about her sentiments about the issue, but is quickly shooed away when she catches Kumiko talking to her cactus plant alone.
In Season 2 Episode 8, she runs into a quarrel with her parents, which is later revealed due to her wanting to pursue her goal to attend a beauty school against her parents wishes.
- The name Mamiko means "hemp" (麻) (ma), "beautiful" (美) (mi) and "child" (ko) (子).
- Mamiko's surname Oumae means "yellow" (黄) (ou) and "previous" (前) (mae).