The Countess is one of the villains of Diablo 2 and a vicious aristocrat, who once ruled in Khanduras.
She once ruled a castle, in the Black Marsh. It is said that she bathed in the rejuvinating blood of a 100 virgins and yet was buried alive. Then her fortune was divided up among the clergy although some of her wealth remained in her tower. During the events of Diablo 2, she becomes the objective of The Forgotten Tower quest, in Act 1. She's found on the 5th level of the Forgotten Tower, using her ax and shield and dark stalker henchmen to attack the heroes.
The Countess is killed by the heroes, who after her death help themselves to her treasure. Interesting trivia is The Countess is reminiscent of the real Erzsébet Báthory, a Hungarian countess who was rumored to have bathed in the blood of virgins to retain her beauty and youth. In addition, Erzsébet Báthory was punished for her crimes by being entombed within her castle alive, much like the fate of The Countess.