User blog comment:B214/Question and Answers 6/@comment-75.128.87.76-20161205090029/@comment-29963364-20161205144916

Yeah. Great Red and Ophis are both Dragons. That's their race. "God" isn't a classification of "race." More like a title to signify your role in the world.

Examples:

* Loki is a Giant from Jotunheim, but he was accepted into the Aesir, the Norse Gods.

* Sun Wukong is a Youkai, but was given a "status promotion" to become a Buddha (which, of course, made him more powerful than ever in his youth).

* Ophis is a Dragon, but she is called a God because she (as the Ouroboros Dragon) is featured  and worshiped in many religions/cults around the world.

* Zues, Posiedon, Hades, etc. The Olympians (Greek/Roman Gods) are decendants of the Titans, which were children of the personifications of the Earth (Gaia) and Sky (Uranus).

 The beings called "Gods" are just an unclassified (unless otherwise specified, as in the cases mentioned above) group of supernatural beings that are prominant figures in the various religions/cults of Humans, and are therefore called "Gods."

 It's even stated in one of the Short Stories in DxD (the one where Kunou builds a shrin for Ophis). In various regions of Japan, there are beings that you normally wouldn't consider as gods that are being worshiped as legitimate "Gods."