Excuse them. Frisk doesn't just quit. And they have no reason to. They'll have to get past him to save everyone, after all.

They make to talk again; they fail again, but they manage to let loose a snarl as their teeth bare.

Fine, if he dodges everything, and they can't even ACT with words, they'll just go.

Footsteps echo as they hurtle down the golden hall, making as if to grab him again--but as soon as he dodges, they just keep going, smashing into whatever else he tries to throw at them with another round of growling.