Lady Kate of Knighton was Marian's mother and Edward's wife. She died of natural causes when Marian was very young. According to Edward, she was very beautiful, kind and was a good mother. In the episode "For England...!", Harold of Winchester betrays Edward and joins the Black Knights out of a desire for revenge against Edward, because he had been in love with Kate and feels that Edward "stole her" when Kate married Edward instead of him.