He doesn't seem at all offended by her threats or suspicions, if anything he just tries to look less worrisome. ...Not that he really exudes anything even remotely resembling a threat to start with. He gives an agreeable shrug before his expression brightens at Hiccup's name.

"Oho, you know Hiccup?"

Actually, considering Hiccup had mentioned he'd been here awhile, it wasn't surprising that a lot of people knew him. And he liked meeting friends of friends.