Vere King of Anjou, {Fictional}

https://en.wikipedia.org/wiki/Jean_d%27Arras

Also known as Vere King of Anjou.

THE MADNESS OF KINGS

A count of Anjou came back with a new wife, a strange girl of extraordinary beauty but she kept very much to herself. Unusually in so religious an age she was reluctant to attend the Mass. When she did go she always hurried from the church before the consecration of the host. Her husband, who was puzzled by her behaviour, told four knights to keep watch and to try to delay her departure from the church. When she got up to go, one of them trod on the hem of her train. As the priest raised the host to consecrate it she screamed, wrenched herself free, and still shrieking, flew out of the window, taking two of her children with her. In reality the countess was the wicked fairy, Melusine, the daughter of Satan, who cannot abide the consecration of the body of Christ in the Mass. It was from the children that she left behind that the counts of Anjou and the Angevin kings of England were said to be descended.

(Of the Plantagenet Branch):

So devilish an ancestry accounted for the demonic energy and passionate ill-temper by which these princes seemed often afflicted. ’We who came from the devil’, John’s brother, Richard I, was reported as saying caustically, ’must needs go back to the devil. Do not deprive us of our heritage: we cannot help acting like devils.’ ’De diabolo venit et ad diabolum ibid’, commented St Bernard of Clairvaux, ’From the devil he came, and to the devil he will go.’