Blood Raven first appears as the unnamed playable rogue in the original Diablo. In Diablo II, her name and her identity as a member of the Sisters of the Sightless Eye is revealed. Her close friend Kashya, however, requests for the player to kill Blood Raven, who now lives in the Monastery Graveyard.
Blood Raven used to be one of the finest captains of the rogues, but her ordeals in the original Diablo had driven her mad, allowing her to be easily corrupted by Andariel. The player is forced to kill her in a boss fight during Diablo II's first act.