ANBUITACHIUCHIHA
Member
when the kages were fighting madara and he was about to get sealed he said something along the lines of kabuto shouldnt of used the jutsu because when the person knows the hand signs you cant seal them back. and im guessing he knew the hand signs from fighting the 2nd and the 1st so much. well orichimaru just resurected the creator of the edo tensei, so from jus speculation you can guess that at least the 2nd and 1st are staying around under their own free will. the only other 2 ppl able to accomplish this was madara and itachi.