Board Thread:Theories and Speculation/@comment-5413572-20150114180437/@comment-25283946-20150222203908

I think this is much easier than it sounds.Kaguya has two dojutsu: Byakugan and Sharingan. These are two Kekkei Mora. The databook has said that even Hagoromo had Kekkei Mora, and probably it also owns Hamura. A son inherited the Byakugan(Hamura) and the other (Hagoromo) the Sharingan. They will have evolved in Tenseigan and Rinnegan.