OK so a lot of people are wondering who the knight is but I have ignitedstickwiththebull Proof that it is William Afton think about it think about it have you ever seen the night in the knight William Afton in the same room William Afton in the same room no William Afton kills kids knight kills kids
you're forgetting one thing though
William afton is part of another game that has copyright
no he has fnaf 
Actually his name is Purple Guy, if Toby called him William Afton he would get in legal trouble
And you all know what happens when someone gets into legal trouble...