@benroyce@mastodon.social @edgeofeurope@mastodon.social This is Alina Kornelli. A well known athlete:
https://en.wikipedia.org/wiki/Alina_Kornelli

The dress is a german Dirndl. A traditional Bavarian outfit. Often worn at Oktoberfest in Munich. Or even while pumpfoiling, if it happens to be Oktoberfest season.