Hakamori

Hakimori (墓守り, lit; Gravekeeper), is an ancient entity. No one knows where she originated from, or even what timeline she was from. All that is known is that she came to be a very long time ago. She serves as an overseer of time itself, and has predicted countless outcomes, and has even guided select beings to an alternative outcome if it benefitted the world as a whole. She is a powerful being, one who can see every outcome in space and time, and has mastered the techniques based around manipulating these concepts. But she is on no one's side except for two; herself, and the fate of the timeline itself. She will never intervene unless the very timeline itself is threatened in some way, and even then, depending upon the outcome, she may not intervene at all.

Background
It's impossible to trace back to Hakamori's origins, or even what her name once was before assuming the mantle she possesses now. All that's known is she is incredibly ancient. She has seen the world change from a golden age, to the fall of a once technologically advanced world due to the hands of a single being. She saw a world rebuild itself, slowly but surely, but relied on war to advance. She saw long periods of peace broken by the broken ambitions of warlords and dictators. She oversaw the arrival of the upon the Earth, and how one  would subjugate the entire world, using the power of a powerful entity known as the, once taken care off by caretakers from long ago.

She saw the fall of this dicator by the hands of her own sons. She saw the birth of chakra and its spread into the world, the creation of the Tailed Beasts, split from the chakra of the Ten-Tailed Beast. She saw one Ōtsutsuki make the Moon their home along with many others, while the other stayed behind to protect the Earth. She saw  wage war upon each other over differing ideals of idealism versus power. She saw the outcome of these events, spreading out into a that pit the  and  against each other. Children were used as soldiers, and the life expectency dropped drastically. It was a miracle for anyone to even make it past their teenaged years without being struckd down. Even when the two reconciled their differences, she knew the outcome.

She predicted that war would once again be waged against the two clans. But she did not intervene, as she knew what outcome this war would bring. Saw witnessed the war against and, who once considered themselves brothers. This war would wage on, the same ideals, the same outcomes, just under different names. Despite the catastrophic losses brought by these wars, Hakamori stood silent, knowing that altering the timeline during these fixed periods of time would cause destruction on a scale that would make every war combined seem like mere skirmishes.

Even with the rebirth of the Ten-Tails and the unsealing of Kaguya, she stood by as a silent observer as the next generation of defenders, and, which powers granted by Hagoromo Ōtsutsuki, sealed Kaguya away once more. With the war finall over, there was peace, but only temporarily. Hakamori foresaw one more confrontation that must go as planned for peace to return. When kidnapped  to awaken the, it was up to Naruto to once again bring the end of the Ōtsutsuki who wanted to subugate the world. It was at this point in time, that peace was finally achieved. But Hakamori's restless predictions would continue to haunt her, and she continues overseeing threats to this day.