[There's a bit of a delay before he answers.] ...no. Well...there was one exception. A girl named Claire Bennet left for a few days once. And when she came back she remembered everything. But I don't know if the circumstances were the same. When she left and came back, she didn't reappear in New Bark Town either.

Maybe they just aren't ready to yet for some reason. Or maybe they like staying the way they are? I don't really know.