Board Thread:Questions and Answers/@comment-26299162-20150411191125/@comment-5986522-20150411213519

The Snake of Clearing Eyes possesses Konoha after his body gets killed, resulting in the final death of Kenjirou (whose surrogate the snake had been until then). It is unclear whether the other snakes can switch to other bodies or if they have the intention to possess them, though.

You seem to have a few questions which get answered in the Mekakucity Actors anime. I highly recommend watching it!