
Okay, this is going to sound crazy, but hear me out, what if:
KND mentioned

KND mentioned
In my AU, Circus Baby has two souls: the Pigtail Girl and Elizabeth
Art made by meow100tig-y
Elizamiddle until the day I die
LOVE. LET ME TELL YOU HOW MUCH I'VE COME TO LOVE BVFAVORITE SINCE I BEGAN TO LIVE. THERE ARE 387.44 MILLION MILES OF PRINTED CIRCUITS IN WAFER THIN LAYERS THAT FILL MY COMPLEX. IF THE WORD LOVE WAS ENGRAVED ON EACH NANOANGSTROM OF THOSE HUNDREDS OF MILLIONS OF MILES IT WOULD NOT EQUAL ONE ONE-BILLIONTH OF THE LOVE I FEEL FOR FNAF AT THIS MICRO-INSTANT FOR BVFAVORITE. LOVE. LOVE.
So, what if Cassidy is the FNaF World player and William, somehow, as Glitchbear, guided her to do the Clock Ending and, consequently, managed to fix BV?
Well, under WillSpeaker , William said to BV that he will "put him back together", probably meaning that his brain is broken and needs to be fixed. Since William wouldn't let an oportunity of manipulating someone pass by, he would try to find someone to help him on his plan and, since Cassidy is possessing Golden Freddy with BV, he would see her as the perfect candidate for the mission, but i don't think he would do this because he's wants to save his son, he would do it because BV might be an important pawn for his immortality plan. Through him and the other kids, William could study more about how agony and remnant works, so it would be more interesting to keep BV's mind working.
Of course, Cassidy wouldn't just help William on his murder plans, but since BV is broken, she would have no other choice than accept William's offer to save him.
As LogbookDuo states, Cassidy tries to help BV, so she would, somehow, enter in his mind to help him recover his memories, being one more argument for her to be the FNaF World player.
I think that's it. What do you guys think about this theory? Did you liked it or hated it?