I imagine Cleany and Head-teacher being reverted as well, but not Alice or Mr. Mix. I don't know how to help them. They look too far beyond being physically restored, if they ever needed to be in the first place.
Turns out you can actually do it to Alice (as well as Laura), among a few newly discovered others (see latest comment). No wonder he wants to remake Alice. But I think Mr. Mix was completely taken, unchanged, at the beginning.
