Honestly same but my best guess is that she's not actually evil or against karina perse but she is confused. The thing is Karina is different from other misunderstood villlaness protagonits because she actually did carry herself like a villainess. there's also a couple of other clues that hint to her not actually hating her:
1)In Karina’s flashback with the plushy dog, it’s their parents who push her to give it to Aurora. Aurora hesitates to take it and even looks confused, but you can tell she is clearly grateful.
2) She stopped the prince from sending an army to get Karina with some weird excuse which if she did hate her she would have no reason to do so.
3) Her sending her supplies to the castle makes me think she might not understand what her sister is thinking but that she still wants her to be comfortable and not lacking anything
4) The Plushy itself feels like a very important clue. Because if she really does love her big sister it makes sense why she would send her something sentimental their childhood to give her confort when she's faraway from home and alone. Just the fact that she kept it all those years speaks volumes.
Those actions of hers are exactly why I'm second guessing if she's really evil or not; I also personally think it would be a better twist for her to actually care about Karina than for her to just be another bitch that secretly hates her for whatever ass-pull reason the author comes up with lol.
This is so fucking peak oml, I can't wait for the two of them to become a badass power couple.
So far I can't really get a read on the sister, does she actually care for Karina or is she really a conniving bitch? It's probably the latter, though.