
Idk if this helps and idk if its legit either but here are some sopilers too that might help answer ur few questions.
"The real realiana knows shes inside of a novel AND shes just a side character and she said " no i can't accept this i want to be the main Character" she looked for Beatrice in the real world AND the girl who is in realiana body NOW is actually Beatrice and the one who pushed her in the real world is the REAL raeliana AND she is now in Beatrice body SO THE REAL VILLIAN IS REALIANA NOT BEATRICE!!"
This is based on someone's theory that I've read! Hope it helps u

She probably thought that after reading the books OG realiana thinks that her life was already on set in her body, that she was destined to die. It also could be that the witch manipulate her thinking that no matter what ot takes she must have killed her body in order for her to survive. Overall if OG realiana just accept her fate earlier and just planned on how to avoid her death just like the MC she wouldn't have to go through such lengths. Since she already know what will happen to her
READ AT YOUR OWN RISK
Base on the spoilers I've gathered:
1. The OG Raeliana was approached by the black vasal before because she's done with her boring life. She was envious of Beatrice life and she was aware that her fiance doesn't like her at all.
2. The black vasal gave her the book Beatrice? (not sure) so she's aware of the story. She became obsess of swapping with the OG Beatrice body because she wanted to be the Main Lead so bad and because she can get Noah. - I came up with this because she's been carrying a book on the previous chapters.
3. Little did she know that the one who swap body with her was Eunha from Korea who knows exactly the story of the book so her plans are wasted.
4. She's been dying to kill her because she want the story to go back at the same track as the novel book entitled beatrice so she can get her happy ending.
Now, here are my questions that I don't fully understand because the raws are in korean and the spoilers of others as well are vague.
1. In the raws, Noah was the one who push her (Eunha) the raeliana now off the building. Others are saying that its because she's the OG beatrice, but how come??
2. Other said that she transmigrated from the manhwa like typical MC's and she was suppose to enter Beatrice body because they have the same appeal and intellectual capacity but because of the swap she went to Raeliana's body instead but why was Noah the one who kill her in the modern world? And yet the Noah in this manhwa seems don't have any recollection of the story or happening.
3. The story of the OG Raeliana's dad. Did he do something to his wife's first love and would it be explain in the novel? It seems like he paid for someone to get rid of Raeliana's first love.
I hope this helps and for those who truly read the novel to explain further my questions for better understanding. Thank you!