[ The reason is fairly clear at least. Whenever Rey needs to change her step to accommodate an incline or avoid some obstacle, she can hear it and try to copy. As long as she can sort of sense how the woman is moving, she can follow along. ]

I guess!... Though we had plenty of weird things. Like the constantly shifting desert, the hidden library. Uhm. [ It is hard to recall off the top of her head. ] The king of Ba Sing Se had a pet bear! It wasn't even a platabear!