AnyaKimlin
Confuddled
I'd always avoid describing anything as 'irrational' in a synopsis I think!! Anything like that reads as a cop out or weak character development (plus in this case the reason for her hatred can be pretty clearly explained)
I guess it is obvious in the context of the synopsis, but not in the book. Angus was never in her way of the throne as he is the younger son and she was above him in the line of succession. It was their older brother abdicating in his favour that put him there.
How about - She's hated Angus since he was in their mother's womb and now he's taken 'her' throne? I'm trying to emphasize that is a very personal hatred of Angus and him being on the throne has made it worse ?