I like to think the Fantasia quest will treat it like “it will make you feel like a whole new you! Refreshing!”, without acknowledging in-game what it does at all. As in, yes it does change your body/gender/etc, but it rewrites at such a complete level that nobody ever realizes you were anything different.

Alternatively “ah I knew it wouldn’t work” because you never were a Lalafel trapped in a Roe body, you always were a Lalafel you silly goose.