Actually, I was the real soul

I threw my phone at the floor
"WHY!!" I shouted "Cosette has an actual reason for wanting to destroy the empire! Her mother was framed and hunted like an animal, c'mon! Why are people hating on her?"
I hated the novel I just read. Why do they always have to turn sisters against each other? The father and the grandfather were real villains here, but, as always, father is going to get redemption arc. Male villains get love, while female villains get hate.
I got to bed, annoyed and angry.
When I woke up next day, I was not in my house. I was in a mansion, in the forest. People dressed in maid cosplays started referring to me as "young lady". No way. I became Cosette, the villain destined to die?!
It seems that this is Keira's second life, just like in the novel. Maybe if I befriend her we can both prove our powers? This body is of Duke's eldest daughter, after all.