User blog comment:B214/Question and Answers/@comment-58.56.124.158-20140124081427/@comment-1359322-20140126071102

People seriously need to stop comparing DxD with the original myths. Even Ishibumi stated in the Volume 1 Afterword that DxD is all original.

"The concept of this series is that “love, dream and battles are also part of being a youth!”. Devils and Angels are the main theme, so during the story, names of those from myths and legend will appear, but this series is written where it won't be restricted by them. In other words, the events written in the bible and non-fiction books are just used for references and the author, that is me, writes it freely with an original story. Just think that the majority of things related to Angels and Devils are made up in D×D. Well, there’s no way that the word [Evil Pieces] will appear in the bible. The war between the three factions: Devils, God, and Fallen Angels, has ended few hundred years ago, and the story revolves around the Devils and Angels after that war. It starts off from where most of the famous Angels and Devils have already passed away. Well, there are other things in my mind. For example bringing stuff from Norse mythology and also from Japanese youkai. Basically it’s a setting where anything is possible."