User blog comment:B214/Volume 22 spoilers/@comment-24583889-20160621010300/@comment-26709288-20160714185218

I think Gods are a race in their own mythology. When you look at mythology even Gods have children and sometimes with each other which creates more Gods. gods also can have children with humans and other races to make them demi-Gods. The reason that I believe they can't be effected by the evil pieces is probably due to them being too powerful. I mean, if you think about it the only things that were originally supposed to be at Gods level was Gods..the Longinus sacred gears were a accident (even the God of the bible didn't know sacred gears could reach such levels), Sirzechs and Ajuka are both considered mutants by their own race, and Michael is in control of Heaven's system. Issei and Vali are both lucky chances. So if you think about it, Gods were the ultimate class of beings that were supposed ti be untouchable by thrme three factions.