"Where is she from?"
Translation:No hea ʻo ia?
It means "where" in this context. "No" is a proposition which seems to mean a wide variety of things, but as far as I can tell its general function is to relate one thing to another... so maybe a hawaiian English way to phrase it is "From where (subject) you?"
How does "Aia i hea" differ from "No hea 'o ia"? The first was the only thing listed in the hints.
No hea (mai) refers to where someone is from, whereas Aia i hea refers to the exact/current whereabouts of someone or something.