Board Thread:Theories and Speculation/@comment-26894845-20151212061943/@comment-734582-20151212132443

Ravenlot 27 wrote: For example: Obito had both MS and Hashi's cells (which made up the entire half of his body), both were perfectly under his control, yet nothing suggests he could've awakened the Rinnegan. Madara wondered if Obito could awaken the rinnegan. However, Madara could've possessed the requirements for decades before awakening the Rinnegan (the timeline isn't clear enough on this). Obito may simply not have been old enough. But as i mentioned above, Transmigrants seem to have vastly improved odds of awakening it. That doesn't rule out regular people can't, but it's improbable enough that it never happened.