like the story alot. its a great start

Can you add Gabriel? She's interesting. And how about Serafall. She is hot. Please continue!

really cool story looking forward to reading more of it :)

Am I the only one hoping that Naruto will be Kunou's dad?

Okay Naruto as a Fallen Angel. Nice idea, though not much has happened to be a proper judge of the story, though you do have some grammar errors and should use Italics to separate thoughts from words.

Harem: I have to say No to Rias, Akeno, Kuroka and Yasaka. Mainly because they've all be done to death and I would appreciate something different if at all possible. Koneko makes sense cause of the sage arts and it hasn't been done before, Xenovia could work since she's sort of like Haku in the whole willing to sacrifice herself for one reason or another. Ravel not crazy about but might work.

However, Please I beg of you, don't include Rias, Akeno, Kuroka or Yasaka. It's tired, old and boring, there are litterally hundreds of stories with that pairing. Please don't follow the trend.

That's all I have to say, if you have any thoughts let me know, and check out my story "The Red Rider" if possible. Agurra out.

nice

Interesting lets see where this goes

well, I like this so far, but of all things, a mechanical arm? I understand Azazel is into the research of sacred gears, but giving Naruto a gun arm seems superfluous considering how absurdely strong Naruto is, not even counting the strength he gained through becoming a fallen angel.
(which I do like by the way, as I highly doubt that anything less then a mutated piece would be able to revive Naruto into a devil. especially since, considering he is the reincarnation of asura and has his full powers awakened, any normal pieces would not be able to reincarnate him)