Anonymous3: Technecly it would only be 2/8 devil 2/8 dragon and 4/8 human because issei is born half human half dragon. If you Really take in functionalities then the child would be roughly around 73.5% human, 8.75% dragon, and 8.75% devil because of issei's tri-way blood patterns.
Anonymous4: ^^ That is not true as Issei was born completely human. He turn into a full on devil by Rias Gremory so I don't know why you are speculating when you don't have proof of that.
Anonymous5(3): Lol just rewatched the whole show and realized how wrong I was sorry XD. I was always under speculation that when reincarnated as a devil you still remain half human. And so when issei turned his arm for Riser it turned into a dragons arm. So I was just under a lot of speculation. My bad XD
Anonymous8: Hold up he also be had power of two god dragon in was it 12 volume he back to life by great red and ophis
Red god flesh
And ophis power turn to dxd g mode
Red god flesh
And ophis power turn to dxd g mode