User blog comment:B214/Volume 22 spoilers/@comment-24593185-20160722022934/@comment-24.113.252.213-20160722050606

You're saying that Azazel built Issei a living Sex Doll that can fight?

Considering Azazel's character, and the overall theme of the DxD series (boobs, boobs, boobs), I wouldn't put it past him, or Ishibumi.