Drusilla

Told by her mother that her visions were an affront to the Lord;
1860: Caught the attention of Darla & Angelus, who became instantly obsessed with her
Made to watch as Angelus butchered her entire family, sought refuge at a convent
On the night she was to take her holy vows, Angelus massacred the sisters in front of her
Went insane, Angelus & Darla had sex in front of her, then he turned her into a vampire
1880: Sired Spike, who became her long-time paramour
1997: Weakened by a mob in Prague, traveled to Sunnydale & restored her health;
Broke up with Spike after he betrayed her by teaming up with the Slayer to stop Angel
2000: Recruited by Wolfram & Hart to sire Darla, who had become human
Began a massacre with Darla through Los Angeles until Angel stopped them
2004: Temporally given Spike’s soul, torture her even more into instability