I think...you're underestimating the value of "being normal". Especially for someone in those circumstances.

[If she were talking to just about anyone else, there would've been far more of a lofty air in her voice, a sort of lecturing superiority that just comes naturally to someone who's used to being the smartest person in the room and knowing it. But for Prompto, there's something softer — an affection she reserves only for, apparently, those plain normal people with nothing special about them that she always winds up liking best of all.]

I'm not a prince, but...I know what it's like to grow up beneath the weight of expectations. To be the one designated to take on the mantle of the "family business", as it were, simply from being born into it. To be in a role like that, and have someone go out of their way to try to be your friend, not because of any ulterior motive but just...to be your friend...

[She trails off, letting the thought hang, before she comes back around to it again.]

It is special, to be normal. It's special to me, so I'm sure it's the same for your prince.