User blog comment:B214/High School DxD EX/@comment-82.199.205.219-20151128092919/@comment-3435913-20151128231427

It's highly likely that most if not all have that ability. Shin sprouts dragon wings as well as angel wings, do there is at least one known case. Ix's artificial boosted gear is called diablos (like Issei's DxD armour) so it could be organic.