Fan Casting The Knightmere in Casting Characters in my Fantasy Series Titled "The Knightfaller"

The Knightmere is the antagonist of "The Knightmere Begins" and "The Knightmere Ends", he is a Demon from Helland (The World of Hell) he cursed Jeoffrey with immortality, tricked him into going back to Briifrod and killing Lerisa and the King, turned the people against with false rumors and more things I cannot go into, The Knightmere is the Overarching Antagonist of the "Rediscovery" Saga