aiba uiha (1st costume)

The default costume of Nijisanji's Aiba Uiha, as seen in Danbooru post #3581607.

It is an idol costume consisting of a double-breasted white dress top with puffy short sleeves and a blue feather accessory, a blue shirt underneath with a matching ascot, a frilled blue skirt with a blue flower, blue kneehighs, white shoes, white gloves, and blue hair bows.