Despite walking and chatting, Rey is more alert of her surroundings than she would appear. Not only with her eyes, but her hearing and other senses as well. When you've been on so many battlefields, you get a knack for detecting when danger is imminent.

In this case, there are none. Yet. Which means that she has to dignify Sans' query with a response.

"Yes," she says firmly. "Wasn't intended for anything else, really."

While that may not be true in the slightest, Rey has lived with that philosophy for so long that it's like a bad tick that's left its mark on her skin. Old habits die hard. Especially ones you've been living with for as long as Rey has.