"No," Asriel blusters immediately, in the defensive tone of a child who, most likely, absolutely does need help.

To his credit, he rethinks it a second later. Part of that is just how impulsive it was; he doesn't really trust his impulses all that much, and of course his first thought was to be rude. But part of it is also that - well, that's not a human. Not anyone he recognizes either, which makes it very unlikely that they're a monster, but...

"Are you...you're not a human, are you?"