As a human she was accosted by a knight. When she tried to accuse him, her entire village instead turned on her, thinking she was a liar or even possesed.

Blinded by faith, her village gathered a mob and threw her into a poisonous swamp to die. And she did. But darkness embraced her soul, and she returned as a powerful spirit with influence over plague and disease. Since her village had made her so sick to the stomach with distaste for human kind, she was in turn inclined to make them sick. Her village and the knight are no more.