"friend/sister/lesbian lover"

Man, you make it sound dirty when you don't point add "one of" "or" "either" "depending on your viewpoint" etc. You've basically just dragged incest into Final Fantasy, and that's a whole new article.

EDIT: Also, I think Hope is the best healer in the game... although it's tough to say when you consider Healing Rod enhances healing magic. I'm unsure if this puts her ahead of Hope or not.

As for the crystal thing, that definitely holds merit, although I suspect they would have already created the crystal forms of the females and then got to Dahj and gone "Wait, we can't have a naked kid in a video game" and given him clothes based on his age, not his gender. Still, they could have easily solved this conundrum by actually showing an adult male in crystal form.