Promise

Spirited Away: the sequel
With her memories gone, Chihiro is baffled to find a braver version of herself looking for something she can't quite put her finger on. One might call it the fantasies of a 10-year-old, but questionable items that seem to be from somewhere far away make Chihiro think otherwise. Indeed, like a witch once said, 'Once you meet someone, you never really forget them. It just takes a while for your memory to come back to you.'
After all, a promise has been made, one that ensures Chihiro's adventure is not over yet.