Board Thread:Naruto Discussions/@comment-3232093-20140617193601/@comment-4271790-20140821171407

And to really beat on a dead horse, what I've stated can also prove Kaguya did not start out at the bottom with a Sharingan, but started at the top with the Sharingan-powered, red Rinnegan. To awaken her Rinnegan, one need's Hagoromo's eyes (light purple Rinnegan), her chakra (TT jinchuuriki) and proximity to the moon (because she was sealed in it). NEWSFLASH: there was no moon in Kaguya's time, and that is why she is a special case for eating the chakra fruit, getting unrivalled power and starting out with the most powerful dojutsu.