Yoko has very BIIIIIIG mother Instincts. That's why Saya calls her very often "Mommy". When Madara fought Saya because of the "banned Biju" Saya get hurt very much and the Aoimoku awakes because of Yoko's worry that Saya could die from it. So she is fighting Madara. After that she loses and both were found by some ninjas. Original is Hinata Hyuuga from Naruto Shippuuden.