Princaia is odd. I guess she could go by Caia which is nice (prefer
Kaia and Kaya). It makes me think of Pringles for some reason. And of the name/word
Princess. Prin would also not be a great nickname :(
Persephone sounds nice but the meaning is so so bad, I would never use it. I don't like the sibset because they both start with P but still have a totally different style.