User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-96.233.56.21-20140331020647/@comment-199.216.110.25-20140404150732

yes but silver is one of the nine gates of hell. the nine gates of hell were demons of zefres book.so they were demons from the start. while minerva was orginally human turned demon. so if silver were grays father that would mean gray would be half demon. so a possibility could be that silver a demon found a women (grays mother) and fell in love with her and so gray was born. also another thing that people dont seem to remember is that when gray was at the graves there was only one grave.