User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-98.26.119.147-20140116102126/@comment-1359322-20140116122823

We don't know how the author is going to write it's like Dante said, Ishibumi can do whatever he wants, he's the true God of DxD.

As to why there are little mention of Angels, well actually there aren't many mentions about the Fallen Angels too, it's about the same for both Angels and Fallen Angels.