Whats wrong with Beatrice how did she and up so different from the original story?

I have two theories and a half.
One, just like Raeliana, Beatrice is also from the real world.
Two, maybe in the original novel there was a hidden side to the story which we or SHE (Rae) didn't know of, maybe something like, Beatrice killed Rae originally so she could meet Noah or something.
Maybe even both? A hidden side of the novel that Beatrice was originally from another world AND killed Rae to meet Noah. And maybe in the original novel, Raeliana was supposed to be the one who ends up with Noah, but Beatrice who secretly came from another world changed that to make herself the protagonist, therefore there was a hidden side to the original novel which wasn't shown to their readers.
Wow these theories seem legit to me

I saw a spoiler somewhere in the comments section xd not sure if its a theory or a spoiler (they said its a spoiler but jusg to he sure)