Saying that one phrase about how he too could see mana moving was enough to get the little princess's full attention. While this was something already known to the human king, it was not to the princess. It was understandable that she would be amazed since she had this since she had been born and it had affected everything about her.
She had learned how to understand her parents and everyone in the castle. She could speak to them and ask for what she wanted. Reading came naturally to her allowing her to delve in to every book she could find. However, that didn't mean she had managed to make any friends even though she had grown faster and developed more than someone who would be her age should be.
