No matter how hard he looks, he won't find any underlying meaning to Rey's words or motives. Simply because there isn't any. She has better things to do with her time than to play cryptic and mock children (even if she does know Firo as an adult).

"Really?" Rey leans her cheek into her palm, casting the boy a sidelong look. "Have you always been on your own?"

She is more curious than condescending.