Mordred Pendragon

モードレッド, The Knight of Treachery, Saber of Red, Aka no Saber
Mordred is the son of King Arthur though in reality she is a woman. The circumstances of her birth are peculiar: Morgan le Fay Artorias sister extracted sperm from the King when she was transformed into a pseudomale form by Merlin. Morgan fused Artorias sperm with one of her ova artificially transforming Mordred into a homunculus clone of the King. Morgan grew Mordred in secret inculcating her the desire to usurp the King and ascend to the throne as the rightful heir. To achieve this objective Mordred was made to be one of the Knights of the Round Table. With time Mordred grew to idolize her father but the King refused to recognize her as a rightful heir. These clashing feelings of love and hate made Mordred play an important role in the fall of Camelot. In Fate/Apocrypha