I just had the best idea.
Tell Loran that we'll give him Allora, and that we're sorry for the trouble that's been caused by our uncertainty. Have Allora and Xoar, who we'll fetch from the dungeons (because we don't yet know it's escaped) be waiting in the kitchen by the doors. When a servant is sent to fetch them, have Xoar take the form of Allora and go in. Xoar won't really talk as Allora, since she won't speak out language, so Loran will see that as Allora just not wanting to talk to him because she's being taken from the only home she's ever known. Loran takes Xoar with him. That gives them like, five hours of travel time to get away from the city, maybe even get off Sapphire Island. Then, when it's time to transform, Xoar just grabs some random animal or something, turns into that, and wanders off. Loran can't find Allora, but he can't get mad at us for it because he was the one responsible for her once we passed Xoar off to him and it's his fault for losing her! Mwahhh!