Diablo II Blood Raven

One of the games that has the best storylines(at least for me) is the Diablo series. And one of my favorite bosses in the game(Diablo 2) is Blood Raven, the first plot-related boss. Basically, she's one of the playable characters from the first game and like the warrior(whom Diablo possessed towards the start of the 2nd game plot) and the Sorcerer(which became the Summoner on Act 2), she was corrupted as well.