In Curse Of Strahd, Yelena worked with The Pack to craft specialized armor sets for Ghalwin Forrester's animal companions, Lancelot and Verity. Though roughshod, she used materials provided by the adventurers to make armor that functioned well enough to work.
After the Riots Of The Blazing Sun, Gunther and Yelena operated one of the only businesses remaining in southern Vallaki, as the rest of the town had burned.