You talking to me or her? Either way, Muriel isn't going to be annoyed by him. She's sweet, polite, and a little shy. She might be bemoaning home and the sea and that fisherman's son. She's very connected to the sea and the freedom it reigns, so being locked in a palace might not suit her, besides her general loneliness.
If he's friendly enough to sit and talk/listen to her about Aqualeia and tell her about this land, she might have a liking/friendship with him.