Princess
Noble Girl
noun
The kanji and the word are exactly the same. That means they share meanings as well. Can also be used to refer to a noble girl as well, as in a girl of the noble family.
The reading is the same as the one you learned with the kanji.
わかったわ。じゃあ、これからはアヤのこと、アヤ姫って呼ばないといけないの？
Okay, so from now on we have to call her Princess Aya?