Board Thread:Naruto Discussions/@comment-11891028-20170719213849/@comment-25122992-20170721102622

Well, it also seems logical to me that the sacrifice's soul gets replaced by the soul of a reanimation, and thus, only the body is technically alive, but there's already only one soul within it, the soul of reincarnated person. I mean, when Edo Tensei is cancelled, only this soul is seen leaving the body and departing to the Pure Land, there's no reason to believe that the sacrfice's soul wouldn't accompany the reanimation's soul if it was still there, in the same body.