Board Thread:Naruto Discussions/@comment-3568954-20140610105302/@comment-3568954-20140611104911

Elveonora wrote: And Byakugan requires chakra, so it's suggested she already had some chakra before eating the fruit, in which case she definitely isn't a human.

chakra is the combination of physical energies molded with mental energies. so it is entirely possible that she had the Byakugan with out having chakra