Board Thread:Theories and Speculation/@comment-27821284-20160218112823/@comment-3965545-20160222133832

It's not just the chakra she needs.. it's the flesh and the chakra that comes with the flesh. Sasuke had Hashi cells implanted in his heart to repair it. Madara implanted the Hashi cells in his chest wound too. They each awakened Rinnegan on the verge of death.. difference being that Hag gave Sasuke even more Hag chakra and extra shit etc so his Rinnegan is different. Hiashi, Hizashi, Hinata, Neji, Hanabi, would need Toneri's flesh implanted into them in order to eventually awaken the Tenseigan.. Hashirama could of awakened the Rinnegan if he took Madara's Sharingan.. same with Naruto if he took Sasuke's Sharingan just like how Toneri took Hanabi's Byakugan. It's actually really simple when you think about it. Body + Eyes = the Physical + Spiritual, the Yang + Yin. From early in the manga that was hinted at, explained.