The reason I don't consider Anima a likely suspect is because she was female in her only other appearance. That's not to say it's impossible, but I don't think it's probable given what we know.

Quote Originally Posted by The_NPC View Post
what about a Primalized Ilberd like Ject [sic] from FF10?
This is actually my real suspicion - Ilberd (re)incarnated as Rhalgr, rather than a simple primal as we've known them. That's my current hypothesis, though there isn't really much to support it beyond idle speculation.