Acheron / Yomi (Honkai : Star rail) (lots of differences) bun hair ver.

She is so cool and sexy!

Pixiv
https://www.pixiv.net/artworks/117515788
X
https://x.com/kinokokunart/status/1775491529177755865?s=20

Fanbox (High quality image and more difference)
https://kinokokun.fanbox.cc/posts/7715888