Answer:
The correct answer is She was the daughter of the lady in Castle weeds.
Step-by-step explanation:
The nun's name was Angharad. She was the lady's daughter at Castle Weeds.
What Perceval remembers of her is that she was cold and contemptuous, and that she did not thank him when he saved her and his mother's life. After that, Perceval went with the witches to the Castle of Glaive and had not heard from her again.
Now the maiden was a nun and she was sorry she hadn't thanked Perceval for everything she did for her and for her mother.