User blog comment:B214/High School DxD EX/@comment-187.209.19.98-20160201021837/@comment-83.51.136.221-20160201101805

I remember that Issei was transformed into a natural dragon in the anime in the 3rd season? it may change from human to dragon .. In the novels King dragon Tiamat (it is a female dragon)  can change from dragonto form human woman ..