Board Thread:Naruto Discussions/@comment-11891028-20170719213849/@comment-1746153-20170721101354

Thekillman wrote: We don't know. We only know that once the technique ends, the host is dead. We also know that jinchuriki die upon biju extraction, so that matches.

I don't think it is replaced. The host simply acts as an anchor for the soul, as we've seen souls having very little ability to interact with the world. An Edo is essentially an inverse jinchuriki, in stead of having the soul sealed away for safety the host is intentionally overwhelmed to manifest the soul's power.

Well, let's just agree to disagree, it's all speculation anyway.

I may be drawing parallels with something external like the Soul Tear shout in Skyrim.