Yeah, that's a weird sight, and slightly disconcerting. Still. The wolf's hungry, but thankfully whoever it is has still got enough sense in them to try and not assault them again with forceful application of teeth.

Frisk pauses and tries to discern words. After working it out in their head, they think they got the gist of it. They gesture to themself with their free hand. "Me? You mean me? I'm Frisk. Who are you?"