I wonder if she'll do something actually bad at the graduation ceremony. Like, her smile on page 31 as they're entering the room looked actually 'villainess' in a way she hasn't been able to achieve up until this point. It'd be pretty cool if the 'final' hurdle the prince had to overcome to be...
It's actually really nice to see the tables turned for once on the typical shoujo tropes: her protecting the Prince rather than her being protected by him. Way to go, main character!