The story is really different, also very interesting. It is noticeable the anime is associated with the bible, what you can realize at some point. But with some other elements not exactly relationeted with it.
Such an underrated series I must to say. The plot is kind of complex,
in the beginning you probably won't expect for it. I have the feeling there much is more than I noticed, and it makes me excited.
Characters:
I don't have complaints about them. They are nice people. (some of them, to be honest). Something that makes me satisfied is the fact the characters have roles in the world. And they have different personalities among them. They made me think of them as real people because of their way of thinking and mistaking. Though in drawings. lol.
Art:
CGI of high quality. Also, the art is indeed very beautiful. The action scenes made me satisfied.
Sound:
They are great aswell. Suiting pleasantly in the feeling the anime passed me.
Overall:
Simply made me have much fun! As I told you before, it is really interesting! I would recommend it for someone who likes SCI-FI things. Supernatural is there too, but the feeling is similar...
