User blog comment:B214/Question & Answers 5/@comment-207.96.205.2-20160517060930/@comment-1359322-20160520093803

Tell that to the author, he's the one who listed and classify things.

http://ishibumi.exblog.jp/19680002/

◎神龍 ◎真龍－Ｄ×Ｄ－ ◎二天龍 ◎五大龍王

And so on, he never classify Great Red as a God but as a True Dragon. Besides Ddraig and Albion has Emperor in their nickname but they aren't really Emperors of Dragons. Neither are the Dragon Kings. You shouldn't think too hard about the nickname. Vali is even aiming to become the True White Dragon God Emperor by defeating Great Red.