User blog comment:Jopjopjop/Volume 20 Spoilers/@comment-16281343-20150722034628/@comment-3965848-20150722115211

I'm kinda curious how they were able to make those fakers, the SM armors are mostly likely from Issei's remains from the DG like the BG replica.

I guessing they geneticly made from are Issei's old body (which is uncanny cause I came up with that idea before it became part of the story) or from Trihexa cause they were in the same room.