Emergency Shuttle

Near Nurvus, the party locates a spaceport that had been hidden beneath the desert sands. Demi has raised it to the surface. This scene shows the emergency shuttle stored at the spaceport. It has been prepared for the trip to Zelan by Demi.

So if this is the emergency shuttle... Then how did Demi get to Motavia? Did she stash away a shuttle of her own?

I always assumed that the emergency shuttle was the one she used to get down to Motavia in the first place, or go back to Zelan if necessary. But then that leaves the question of how Wren would leave Zelan if he needed to. Huh.