Perhaps there's more that they can affect than they realize. Namine looks up when he name is called, although since she doesn't turn to face them, it's unclear whether she knows they're there...or is simply choosing not to acknowledge them.

Before she can give any real reaction, though, she's interrupted by those right behind her. A large door towards the front of the door creaks, and in walks Sora, with Donald and Goofy close behind. Feelings of wonder, a little apprehension, but mostly anticipation soon follow...it's clear to both that this is Sora's memory.

Donald is the first to speak up. We have to sleep in these to get our memories back?

You'll be fine. It might take a little time, but I'll take care of you.