P.o.V. 3rd. Person
Kaguya Otsutsuki.
In her clan she is known as the Moon Godess as the moment she was born, moonlight engulfed her body. Born with the mighty Rinne Sharingan and two Byakugan eyes, she has been constantly pampered and proclaimed as the hope of the Otsutsuki Clan.
The Otsutsukis have a history of travelers that at first started out exploring new continents on their planet and later on being the first to have reached outer space. Thousands of years made them the strongest living being on their homeworld and had them colonize even other planets.
Unfortunately they started fighting each other for the only important resource in their history: Chakra.
Otsutsukis were only able to rise beyond the powers of normal humans as they had access to chakra and learned to absorb that fascinating energy from other living beings and more important is the fact that the sustain their life by using chakra.
But with their rising population, they started to completely absorb the chakra of their own planet, letting it wither, and then continue with other planets.
After a million years of constant space exploration, they started fighting each other and reduced their numbers below a hundred to sustain and prolong the clans existence.
Throughout time they were known as the first explorers and the mightiest being in their own dimension, yet once they started living in environments without chakra, they started to slowly die out.
At the end they managed to find a method to travel to other dimension with their ocular powers and started so-called chakra farms.
They would first spread humans to habitable planets and then plant the seed for a chakra tree, which would absorb humanities life energy and convert that into chakra fruits.
That plan worked out for several hundred of years until people started to fight each other for these fruits. In the end everyone that was able to travel to these farms was killed and the last twenty of the clan had to find a solution to their problem.
After years of experiments and failures, Kaguya Otsutsuki was born, as one of the first children with the Rinne Sharingan since years.
The Rinne Sharingan are the ocular powers of their dimension travelers and was required to fetch the chakra fruits.
Kaguya knew that it was her duty to return to these chakra farms and get the fruits for her clans survival and she took that duty serious.
She would travel from one world to another and bring back the fruits for the clan and managed to bring back hope to the clan.
Unfortunately she had been the only person who managed to awaken the Rinne Sharingan and fellow clan member wanted her eye for themselves and control the chakra fruits.
So it came to no wonder that she got ambushed at one point and only with luck managed to 'jump' to the Elemental Nations.
She would be found by the local humans and nursed to health.
Her abrupt jump to another dimension damaged her badly and even had her temporary lose her memory. Years later she recovered her memory and remembers the chakra tree, by the locals hailed as the God Tree.
In her life as a fellow human, she experienced the hardships humans lead and started treasuring them as one would a pet.
Unfortunately humans had been constantly in conflict with each other and she started resenting their violent ways. Looking back at the history of her clan, she knew that constant conflict will only destroy humanity and she did not want to see her new favourite pet dead.
Therefore she went to the chakra tree and ate its fruit, completely absorbing hundred of years of accumulated chakra and managed to put an end to the constant wars.
The tale has been stolen; if detected on Amazon, report the violation.
The now called Rabbit Goddess achieved her goal by having trapped a good portion of humanity into a genjutsu and had them live out their own dreams.
Years went by and she enjoyed her life, even managed to find a husband and birthed the twins: Hagoromo and Hamura.
Both were born with chakra like all Otsutsukis were, which made both dozen times stronger than the normal humans.
Kaguya would teach her children about their clan, teach them to read and write, discuss philosophy and also teach them the original fuuinjutsu of the Otsutsukis.
She even taught the twins how to utilize their chakra and ocular powers.
What Kaguya would have never imagined was that her happy days would stop sooner or later.
Ever since she first saw Hagoromo and Hamura using her their chakra, Kaguya had an annoying feeling in the back of her mind, which only grew stronger with each passing day.
That feeling only wanted her to do one thing: Absorb all chakra.
Years went by and Kaguya finally snapped. She started converting the humans trapped in the genjutsu and completely lost her mind.
Filled with memories of the clans betrayal, filled with memories of possible dangers from another dimension; she only wanted to protect her precious chakra.
Her two sons would find out about their mothers apparent mental health and confront her.
In her madness Kaguya absorbs the chakra tree and turns into the ten-tailed bijuu: Juubi.
Hagoromo and Hamura manage to seal the Juubis husk and with it Kaguyas body into the moon, while Hagoromo turned into the Juubis Jinchuriki and would later spread chakra to the whole world.
With her body trapped inside the moon, Kaguya freed herself from the original influence that drove her to her madness.
The moment Kaguya had absorbed the chakra fruit, she also absorbed part of the chakra trees will.
The hundred of years the chakra spent absorbing life energy led it to gain simple sentience. It lived for one thing, which was to satiate its hunger for more energy.
Kaguya absorbed part of that will and got mad with absorbing back her own chakra.
Only by finally freeing herself from the Juubis husk (and therefore the original chakra tree), did she manage to regain her own sanity.
Since then she has been waiting for Black Zetsu to revive, until she noticed a soul from another dimension entering the Elemental Nations.
Maybe she could use that soul to be revived and make sure that she keeps her own sanity doing so.
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P.o.V. Hinata
That last part at least explains why Kaguya is not a crazy woman set out to possess my body and why she is willing to give me part of her own chakra.
And because I witnessed all these events from Kaguyas own perspective I could also feel her emotions. Nothing seemed to be rigged in some way and truly seemed to be genuine.
Damn. She is the result of her clans desperation and later on betrayed for the clans greed. The whole history of the clan is full of conflicts based on their greed for power and especially chakra.
It is no wonder that Kaguya is unhappy with the way humanity leads their life.
Then there is the part with her own two sons sealing her away. That part got me good.
Even if she was completely crazy by that point, that betrayal hurt her more than that of her clans.
From my own perspective, I think that her sealing shouldn't really be considered as betrayal, but she feels otherwise.
There is only one thing that still bothers me.
At the end of the fourth shinobi war in the original story Kaguya is revived, but she seemed to be the same Kaguya as in these memories unlike the Kaguya I am currently talking to.
Is it because her new body is the Jinchuriki of the Juubi? Or did her sanity never really recover in the original story?
"What do you think about my life Hinata?"
"You have led an interesting life Kaguya. I am willing to help with your revival as long as we can find a way to guarantee your sanity. I am assuming that for your revival, we need to revive the Juubi and then have it be absorbed by your new vessel for you to possess."
"Oh~ Indeed. Black Zetsu is obviously doing so, but what he does not pay attention to, is my own sanity once I revive. The reason for it is that Black Zetsu has a part of the Juubis own will inside of it, which makes sure that my mind will be corrupted on my arrival. The only solution is to use part of my untainted chakra, which currently resides inside of yourself."
"That might have been a problem later on."
"Yes. I don't have a connection to Black Zetsu, which is why I had to find a willing soul to offer my chakra to. In fact, my conciousness completely resides inside of you. It is you who will have to transfer my conciousness into the new vessel and in no case Black Zetsu."
"So just to repeat that. Black Zetsu is trying to revive a version of you, that is in fact the Juubi, while I am trying to revive the original version? Damn."
"At least you only have to worry about the moment, when you remove Black Zetsu. You have to absorb his part of myself, shortly before my own revival. This way you can make full use of his services, while increasing your own power in preparation."
"Won't the Juubi-part notice your own chakra inside of myself?"
"No. The Juubi only orders Black Zetsu to reconstruct itself and will then want to insert his own mind into the new body. I don't think he will recognize as you as threat. Black Zetsu himself is probably the only one in this world who will recognize you as my champion and he will gladly let himself be absorbed by you, should you manage to convince him of your connection to me."
"That whole mess got kind of complicated."
"Don't worry Hinata. I am sure you will manage. Besides until my revival, I will be by your side."
"Yeah. A second voice inside my head~
Anyway I should probably wake up and... live the next months with my mother before leaving Konoha."
"Hm~ Have fun."