Board Thread:Fanon Canon 2/@comment-2089817-20140922021242/@comment-2089817-20140922051418

@Serk - Considering the fact that she somehow had the time to manifest Black Zetsu at some point before she was sealed away, it isn't completely unreasonable to assume there was a way that she allowed some part of her chakra to escape being sealed away. But that's neither here nor there in the long run. That is only part of the argument. Seireitou, as I've said a hundred times now, is the result of a rare atavism. As we've seen before, chakra can reflect familial ties. Therefore, atavism, which allows one to revert back to ancestral form, would allow Seireitou's chakra to revert back to Kaguya's own; which became possible since he also became her soul's transmigrant.