Board Thread:Wiki Discussions/@comment-25134516-20140703093231/@comment-25134934-20140703150418

I never said souls, I said will or spirit, not the same thing. Now, chakra always remains, that's why you need to get a DNA sample to do Edo Tensei so you can revive the person, here anatomy and chakra are linked together. You will always keep the same chakra frequency. The chakra migration only happens to those SOULS that had such a strong presence/chakra/will that they keep migrating throughout time as Rikudou said.

The reason why Madara didn't have his eyes when he was revived it's because he didn't have them as a dead body in his coffin, his eyes were took off by Obito remember? I think Madara specifically said that on the manga.

P.S. Chakra is a hinduist belief haha not japanese.