Curse of Strahd
Lady Wachter came from a long line of nobility with close ties to Strahd. She was frequently accompanied by her imp familiar.
Recently, she fought with Baron Vargas Vallakovich for control of Vallaki. Her plans came to an end when the PCs decided to take the side of the Baron. With the help of one of her traitorous henchmen, Ernst, the party slaughtered her and her sons in their den.