I think I also read somewhere that Gods and Spirits can't have kids. Is that true? And if so what's the deal with Aria and Aiz?
And why is the Corrupted Spirit looking for Aria? The LN contain some info about that?
Lastly, isn't it strange that "Aria was said to have the exact same appearance and voice as Aiz Wallenstein." and Albert in the manga/anime was looking exactly the same as Bell?