Dear Fantasy world

Alice who was an highschool student, got dragged into her current reading fantasy novel without knowing when or how she got into that world. She got introduced into her new life as a new character, Isabella Regina who was a rich and humble teenage girl in that novel she read. While she was starting to adapt into the new life of her, she realized that she was the only one person who act differently from her character that she read in the book as she changed the whole setting of the story. How will she go back to her reality? How will she break out of that fantasy world? What would the author will do if she was out of character?