No, she actually has foreshadowing that would indicate the possibility of redemption. I don't care about those things as much as what makes sense in narrative and it would seem that the author is setting up the possibility of her switching sides in the future.
Her sister doesn't which is why I don't want her sister to turn on a dime. @FStubbs
The simplistic, uninspired and predictable writing that's common in generic isekai will have at least one of these girls switch sides to join the protagonists. We'll see if such a thing actually happens.