[Rubia's eyes immediately light up at being called a princess-- Which prompts Caius to quickly wave his hands around between her and Kor to try and stop Rubia from getting too carried away.]

She's not a princess! Princesses don't act anything like Rubia does. ["Excuse me?!"] I'm just saying the truth, you're not a princess! You're not even related! ["Are you just jealous because there's more royalty around now? Honestly Caius, shouldn't you act more like a prince anyway? That's very unbecoming of you."] Stop trying to talk like a princess!!

[Hi they're just. Arguing. It's like their default natural state of being so. Get used to it Kor.]