Maybe Alice is a kind of monster, if she doesn't age. Unless everything else is similarly caught in time here, which means that Frisk...

They look at their hands. Are they going to be like this forever, now? For as long as they're here?

This place is feeling less and less like Snowdin all the time. They'd thought for a brief moment that they were back Underground when they woke up here, but this - it's all wrong.

They glance back at Dipper, wary again. "So you've been here...how long?"