User blog comment:B214/Question and Answers 4/@comment-24866657-20141019162746/@comment-1359322-20141020103744

@Ran, actually no. Back then Issei wasn't a Devil. Issei was purely a humanoid Dragon back then. The only reason why Issei was a Devil is because of the Evil Pieces without it, Issei isn't a Devil.

"[Appearance, shape, and certain parts are the same as that of a human. You can continue your life normally like before. But since the evil-pieces are missing from your body, you can say that you are a humanoid Dragon. Even though there was help from Ophis, you received your flesh from Great Red. You can say that you are a small True-Dragon.]

So in other words I am like Great Red’s child.

[On top of that Uroboros’ power is added into it. Even in this state, your basic physical abilities have improved a bit from before. ……Well you were originally crap to begin with, so it only improved that much……]

I’m sorry for originally being crap! I was just an ordinary high school boy! [The merit of it is improvement of your physical abilities which I just stated, and I can’t predict what kind of growth you will be going through after having the power of True-Dragon and Dragon-God added to you. Also it is okay for you to move away from Great Red now.]

Wasn’t my power already hard to predict anyway? Because of breast-power and stuff.

[Well that is true…… The demerit is like I said before, you lost many abilities because you no longer have the evil-pieces within you that were the source of your abilities. Also the danger of dragon-slayers has greatly increased since you have gained the powers of Great-Red and Ophis.]"