Nice AU fic and a good theme on 'What if that character survived?' or in this case Christina. Also the idea of a Setsuna/Christina pairing is quite an interesting concept.

I would never expect Fon to save anyone. Especially since he actually left Tieria behind after he recovered Nadleeh's GN. Still it's nice to to see Exia's predecessor met the final product in a sense.

A SetsunaxChristina fic huh? I honestly never thought I'd see one of these kind. At first I was sceptical seeing the length but however I always have an open mind to every pairing. (Except SetsunaxMarina -_-) The chapter was shorter than others but you were good in giving the material in such little time that it did feel longer, also a nice touch in keeping Setsuna in character. (I'm never picky about OOCness sense I break that every so often) ...FON SPAAK saved her? Who would have thought! xD

not a bad one shot. Iy may sound like I'm complaining but this one shot idea of yours could have went a long ways into a good long fic ) great work

Weak oneshot with insuficien backstory that is unable to provide a suitable excuse for the AU event that it created

Astraea is awesome and I forgot is Harem. Awesome story

Well that's a damn shame. I was willing to see if you can make this into a series(I liked Christina). But meh, not a bad one-shot. Great to see original pairings here and there though.

Say, there's an idea I wish to discuss with you if you wanna talk about it.