Drusilla was the love of Spike the vampire for several hundred years, and was also Spike's sire. She was tormented emotionally and psychologically before dying, eventually to become an insane vampire who had visions of the future.

Drusilla

Drusilla was the love of Spike the vampire for several hundred years, and was also Spike's sire. She was tormented emotionally and psychologically before dying, eventually to become an insane vampire who had visions of the future.

All data from the awesome folks at Marvel.