Essentially a giant instrument, the Caravan in Revery Rebirth is the main way you’ll be traveling around the map. Mostly.
A boisterous woman named Barbara plays the keyboard which uses the air element to move the Caravan forward.
Later on in Revery Rebirth, the Caravan is a great way to visit places you've been before, and maybe find a song sheet stuck behind some puzzle you didn't get at the time. (read: open world)