Board Thread:Theories and Speculation/@comment-5413572-20150114180437/@comment-5413572-20150118031920

I'm pretty sure that Kaguya was the first to get the Byakugan, and then only after eating the Chakra Fruit. Only Otsutsuki who are descended from Hamura have it later. I could be wrong on that, but as far as I know this was the case, so even if we assume that Kaguya married a male Otsutsuki, he couldn't be the one who passed the Byakugan to Hamura, and thus can't be the reason for the latter getting the Tenseigan.

Even if we disregard all that, it seems highly unlikely that his father having the Byakugan would be enough to give Hamura the Tenseigan- why would combining this Otsutsuki's chakra with Kaguya's eventually produce the Tenseigan in Hamura, but once it was diluted again, only replicating the latter's chakra could reawaken it?