I guess the big question is whether 'Saturn' remembers being Saturn, i.e. whether they have become part of a larger whole, or whether they are now an entirely different person.
So it's unusual for the Shadowslayer to not remember her past as a child... or at least, I bet she regains her memories at a more steady rate rather than being realized all at once. Hmmmmph. I kinda wanna see what a more typical Shadowslayer's life was like.