相羽ういは(最後衣装)
The fifth and final [[official alternate costume|costume]] of [[Nijisanji]]'s [[Aiba Uiha]], as seen in post #7036549. Revealed on December 25, 2023 (a few days prior to her graduation on December 30), it was part of her last 3D live.
aiba uiha (5th costume)