Board Thread:Naruto Discussions/@comment-24531362-20140831150337/@comment-25072274-20140903225250

Don't be mean, Elveonora. She lost control because of Naruto's attack, the beasts' chakra resonating violently with hers. Of course not. She was already in her human form and Zetsu even said she lost control of her Ten-Tails form.

But that doesn't explain how she regained control over that form, Ten Tailed Fox. My guess is that half of BZ is her own mind and will, and the other is that sneaky black blob.