User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-107.220.124.140-20140623044132

No, not possible. The demons said something about the artificial demon, Minerva, not being a failure like doriate. This obviously means that they only made 2 demons, none of them silver. Besides, they can make demons, but I don't think they can create artificial demon slayers. I think that silver is gray's dad, but he's a natural demon. I don't really know what happened, but the episode was called " father and son", so they're really father and son, but I'm sure that they'll explain it later