Oh my god my brain hurts! It really isn't that hard but everyone is making it hard lol!
Current Realiana is actually OG Beatrice, whose soul was reborn in the Modern world where she read a book that was about her past life, but because of OG Raeliana her memories were erased so she doesn't remember anything... OG Raeliana wanted to be the MC so she got some help from some black magic using witch and killed/pushed the soul of OG Beatrice body so that OG Raeliana could put her soul in it and became Beatrice. I don't know why Beatrice's soul went to the modern day world but it did and while there she was pushed off something and magically came back to the world of the book and since she couldn't go back into her OG body she could only take over Raeliana's body. So to make it as simple as possible...
Beatrice = Eunha = Current Raeliana
Raeliana = Current Beatrice
Okay so- A bunch of comments are saying different things. Let me try to summarize it as accurately as possible. So, Beatrice is MC, Aka the new Raeliana. Basically Beatrice died in her first life/the main plot of the novel that MC read (Not sure how) and was then reincarnated into the modern world so she could learn about the book again after loosing her memories. Some sort of black magician told the OG Raeliana about the story and so she felt like she had to live the life of Beatrice and she did some voodoo shit to swap bodies. Now Beatrice is back in the body of our MC and she has lost her memories of being the original Beatrice. The OG Raeliana is now living as Beatrice and trying to the actual OG Beatrice (Our current Raeliana.)
I hope that helps out some people because honestly a lot of the other comments made it sound super confusing when it's really just
• After the novel ended, Beatrice died and went to modern world because Raeliana did voodoo shit.
• Beatrice comes back as Raeliana and just lost her memories of her being Beatrice.
• Raeliana is now Beatrice and is trying to kill Beatrice who is in Raelianas body.