At the start of the end, you see Gisela getting off a boat, saying something like "That glasses girl said it would take years to recover, but I did it in a few months!" (or something like that). She walks through town, passing Peter and Gerhard along the way, both of whom absentmindedly reply to her commentary then do a double-take after she passes them. She knocks on the door to the house, which Totori answers. While everyone is frozen, Gisela makes a bunch of snarky remarks about Totori, Ceci, and Guid. The scene ends with "It's long overdue, but I'm home." (or something like that.)
I hope they expand on this a bit more in Meruru, like where Astrid found her and where she was the whole time while recovering. Not terribly important information, but would be neat.