Board Thread:Naruto Discussions/@comment-32685487-20180610182908/@comment-33308438-20180611082905

Nagato is Senju and Uzumaki Hybrid. Not just that he and his parents originate from all the clans of Hagoromo which is actually why he's labeled an S06P. Rinnegan cannot be wielded by even a Uchiha plus Senju Container like Obito. So it's not just the above two clans in work here.