So game has been out for 1 month. What are the overall impressions?

[Fynn]

I have this nagging question.

(SPOILER)What the hell is up with Airy's sister? It's kind of a deus ex machina, though not entirely unforshadowed. It's just that... Is she a real Cryst-Fairy? We know Airy was lying and that she was created specifically by Ouroboros to upset the balance of the Crystals, so does that mean her sister was created alongside her? But that's not possible, as Mephilia (I think) suggests that there's a celestial within Tiz, something Airy definitely is not, considering her birth. So I guess they can't be sisters in the bilogical sense, how we understand it. Also, Airy said she took the form of a cute fairy to deceive Agnés and her true form is that bug thing, but we see her sister as a fairy. Does that mean Airy based her appearance on her sister, or is her sister in disguise as well?

I mean, the game treats this so casually! "Oh, by the way, this fairy is a good one, not that bitch," but that just raises soooo many questions!