Morgana Pendragon

Morgana Pendragon is the illegitimate child of Uther, she grew up with Gorlois not knowing Uther was her real father, she found out and felt betrayed and swore revenge on Arthur that she would become queen someday, learning magic and becoming a witch she grows stronger every day, but her sanity continues to deteriorate, she became the malice that she once hated, and will do anything to stop Arthur from anything he wants, including life... She's friends with Mordred and hates Merlin, or Emris