"...What? What do you mean 'again'?!" He hurries after them, frowning intently and thinking back over what's been said before. Could that mean...?

Once they reach the clearing, he slows to a stop, resting his hands on his knees for a moment as he catches his breath. After watching Frisk drop, though, he lets out a quiet huff and drops his box on the ground before sitting down next to them, still examining them thoughtfully.

"What's your name, by the way?"