It's always a little strange when the heroine, a character who is already written to be isekai'd into the world and has a predefined personality, is seemingly a different character. If their personality is different, why are they in a world that per-ordained what kind of person and character they are? Are they also possessed by another reincarnated soul, which seems to allow one to break from their fated action? If that isn't the case, then the pre-established story that the villainess is trying to defy doesn't matter in the slightest, because fate has seemingly already changed before they reincarnated anyway (since the heroine should be a legitimately good person, but isn't).