Board Thread:Naruto Discussions/@comment-3568954-20140806112253/@comment-1512913-20140808185733

Except WindStar, transmigrants of Ashura and Indra don't have their souls either... Kishimoto used an incorrect term, there's no actual reincarnation going on. The transmigrants simply get born with their chakras as their own, Ashura and Indra's souls are in the pure land most likely.