Board Thread:Naruto Discussions/@comment-5413572-20141206200019/@comment-5413572-20141229165410

Naruto uzu6254 wrote: I think the Tailed Beasts which were sealed inside Hagoromo might be the cause for Indra obtaining the Sharingan, it might be one of the reason because the Ten-Tails had Rinne Sharingan or may be the red colour Rinnegan on Hagoromo's forehead was passed on to Indra (which is more direct).

I thought Hagaromo's "third eye" was just a tattoo or some such? Anyway, I don't know about the Tailed Beasts' chakra being what gave Indra the Rinnegan- for one thing, the actual Tailed Beasts weren't created until well after Indra was born, so the Ten Tails' chakra would've needed to be responsible. The idea certainly has merit- with the Ten Tails basically being Kaguya, and each grandchild getting one of her capabilities, it would provide a catalyst- but their abilities could just as easily come from Hagaromo directly. Plus, we again run into the problem of why the Rinnegan would weaken to the Sharingan- it makes at least some sense if we go purely by (for want of a better term) genetics, with the Rinne Sharingan weakening to the Rinnegan and the Rinnegan then weakening still further to the Sharingan. If we bring the Ten Tail's chakra into the mix, though, reason would dictate that it would've strengthened the Rinnegan in Indra, not denatured it. So how exactly would the Ten Tails' chakra have brought about the Sharingan?

The descendants of Hamura and their Byakugan was unchanged because it did not have tail beast influence. I'm sure this must be the case because Kaguya's original power must have been Byakugan and she was alien, after consuming the fruit the power might have developed into Rinne Sharingan on her forehead,

Has it been confirmed that the Otsutsuki had the Byakugan beforehand? I was under the impression (and the wiki seems to indicate such) that only the Otsutsuki descended from Hamura had it, indicating that it did first appear in Kaguya after she ate the Chakra Fruit. So, the Byakugan and Rinne Sharingan appeared simultaneously (which is again confusing- you'd think the Byakugan would be a kekkei mōra, then, but it's not). Again, I'd have done it differently, with Hamura getting the Tenseigan, passing it on to the Hyuga (in whom it denatured to become the Byakugan), and the recombination of his two bloodlines being needed to reawaken it (just as Asura + Indra ≈ Hagaromo = Rinnegan, Hyuga + Otsutsuki ≈ Hamura = Tenseigan).

I like your theory though that there was a total eye that was like Rinne Sharingan without red colour

It's not so much a theory as a fanfic alternative. Where Kishimoto has:

Rinne Sharingan -> Rinnegan -> Sharingan

Byakugan x ∞ = Tenseigan

my descent is:

Gōkeigan = Tenseigan + Rinnegan

Tenseigan = Hyuga (Byakugan) + Otsutsuki

Rinnegan = Indra (Sharingan) + Asura

but I don't think so that the "Total eye" would be a prerequisite for Rinne Sharingan that would be like just adding red colour

That's not what I was suggesting. Canonically, the Gōkeigan doesn't exist, but in my alternative, it's the first and most powerful dojutsu, and it gave rise the the (weaker) Tenseigan and Rinnegan. The Tenseigan then denatured to the Byakugan, while the Rinnegan denatured to the Sharingan. Since the Gōkeigan gave rise to all these dojutsu, it has elements of all their appearances- white in color like the Byakugan/Tenseigan, and with concentric circles and tomoe like the Rinnegan (with Sasuke's tomoe'd Rinnegan being the correct one, and having six tomoe where the Gōkeigan had nine to illustrate the drop in power).

Also just like her eye powers were divided into two and transferred similarly her powers of her body counterpart must be transferred, although I have no idea how her powers are divided, I'll just assume that All Killing Ash bones and ability for travelling through dimension was passed on to Hamura, and  her Regeneration abilities like developing arms, body parts was passed on to Hagoromo, so that Hamura travels to moon and Hyuga and Kaguya clans are descendant of Hamura Otsutsuki and Asura and Senju clan might have those healing powers. I hope that her origins will be explored in more detail in anime; the manga was bit rushed.

I view Hamura as having gotten the Byakugan (or in my alternative, the Tenseigan) and Shikotsumyaku, with his descendants (on Earth) becoming the Hyuga and Kaguya clans. Hagaromo got the Rinnegan and her powerful life force, with his descendants of course being the Uchiha, Senju, and (through the latter) Uzumaki clans.

Also I was wondering why Sharingan remained constant for generations just like Byakugan why did it not transform into Rinnegan, the reason could only be chakra (just like in biology epistasis, the Rinnegan gene is masked by Sharingan gene and only Asura chakra can help in regaining Rinnegan) or may be it's not related to biology, also Indra's mangekyou was unique it transformed into spiral looked similar to Rinnegan unlike other mangekyou that develops into tomoe variants, these are the things that are bugging me

It was canonically explained by Hagaromo that his unique Six Paths Sage Chakra is needed to awaken the Rinnegan, and to get Six Paths Sage Chakra, one needs to combine Asura's and Indra's chakras. The latter two reincarnate constantly, but there's only one living host of each at any given time. If these two transmigants recombine their chakra (which has only happened once, when Madara incorporated Hashirama's flesh into his wounds), Six Paths Sage Chakra is produced, and it will evolve the Sharingan into the Rinnegan. (It's not 100% clear if someone without a Sharingan can get the Rinnegan this way.)

As for Indra's Mangekyo, it seems to be coincidental that it resembles the Rinnegan- all Sharingan and Mangekyo are based on pinwheel-esque designs, and a spiral is a common pinwheel pattern. Of course, Kishimoto probably did delibrately make the two look similar for artistic reasons, but in terms of story, it seems to be pure coincidence.