Deadly Silence (Kakashi x OC)

Once Upon A Time...

There were two people, from rival clans, who fell in love.

Due to them being rivals, their parents had forbid them seeing each other. The young teenagers didn't listen to them, which caused them fleeing from the village together, leaving the flabbergasted parents to worry and at the same time, to live in a great shame, that they have brought them.
They fled to the Hidden Village called Kirigakure, in the Land of Waters, where they, as soon as they could, settled. The pair lived happily. Because they found out, that the year after their secret marriage, they have a baby together. The parents were happy, hoping for a boy. They knew that the baby will have either the great Sharingan, from the famous Uchiha Clan, or the Byakugan, the Hyuga Clans Kekkei Genkai. They were surely happy, knowing that the baby will continue with either one of them.
After countless days and nights, the long awaited day had come, the birth day of their long awaited son.
They were purely happy with this occasion, because as the Hyuga Clan's prophecy had said, 'The great power will be unleashed, when both Clans will combine, to form an eternally almighty beast, that can either save, or annihilate the whole world, with only the flick of its wrist'.
Not long after, the future mother gave birth first to a charming, beautiful girl, no longer after to a little boy.
She was very happy, knowing that the boy was born. Though the woman was beyond sad, when she found out that he hasn't inherited either of the Kekkei Genkai.
The years have passed showing truly and instantly, how powerful the first-born girl was. They gave her a name to match her beauty - Mizakuri.
The day she started to walk, which was when she was two years old, was the day of her first training. Soon after, the girl had lost her interest, due to her strict mother. It was a pure daily torment.

Her mother made her train every single day, making her skip lunches or dinners, which happened when she did something incorrectly. Her mother's intentions were not to improve the daughter to become better than she is, but to use her as a punching bag for herself. Due to her hate for her daughter, that stole everything from the younger boy. Making him useless, leaving him without any Kekkei Genkai at all. Everything was going to waste in her eyes.
After the year of training, Mizu never showed her emotions on the training, rather at night, silently sobbing herself to the point, where she was suffocating. Soon after she goes to sleep. She never wanted to be what she was; she never asked to be a monster...
She always heard how her brother listened to her mother's soothing voice at night, telling him countless stories, while brushing through his jet black hair. She always made sure, that she never cried too loud, so her mother wouldn't have seen her being in a weak state.
It was the constant fear, that she lived in.
I will never be happy, she thought to herself every day. I don't deserve to be happy.
Until one day...
When her mother told her at the age of four, go to to Mizukage.
As she heard the village rumors, the great five tailed beast had to be stopped, and in order to do so, they have to seal it in a very strong body, which can hold the immense chakra within the monster.
She was used as the Jinchuuriki, but the power had its cost.
The kids never wanted to play with her when she had time outside the training. Even the adults were scared of her. Every single person called her:
Monster!
Freak!
Death itself!
Nothing, but a burden to her poor family
Danger to everyone!
Beast!

They always judged her, no matter what she did.
Even the kids were scared, that she was going to possess them, or even eat them. She was the victim of constant bullying.
Though it never stopped, even at her own household, her brother called her names, sometimes pulled her hair, it even came to him punching her. But Mizakuri could never do anything to stop it, she was too scared of her own, full of hatred, mother.
Her father owned a Fishing Tools Shop, and mostly he spent his time there, taking good care of it.
Two months after Mizukage had trapped a Tailed Beast in her, her strict mother had died of unknown disease.
There were rumors, that her own daughter viciously murdered her.
Her twin brother started to weep for his mother every single day, blaming his sister for everything bad that ever happened. And yet, she still couldn't do anything. She was helpless.
Only after three months, her father ended his life, because of the great misery, that was brought to him by his wife's death.
The brother and sister were left alone; they never knew their grandparents or any of their ancestors. Enormous sadness filled the boy's heart, making him crueler towards his sister.
Losing all her hope, self-respect, self-control or whatsoever, she turned on him. She thought, that she could never change anyone's mind about her, in a way deserting her dream of being respected or at least accepted as a human instantly.
She killed her own kin... her only left family... Her cruel brother.
And it was her very first kill. She realized how fun it is to kill people.
She was more than happy... she was ecstatic, about the idea of murder.
Mizu comprehended, that she was bloodthirsty...
Couple of days, after the slaughter; she fled from the village where she lived four years of her life.
She traveled, found out a lot of things about her newly found power to control water.
Mostly she played with it, when she was bored. It helped her to stop thinking about bad things, like her family and her old village.
She was in constant fear because of the Tailed Beast overtaking her fragile body and started becoming an insomniac, because her tailed beast threatened her, making her feel terrified.
She was scared, that she will start murdering the innocent people, but then, no longer cared about it anymore.
Mizakuri thought that she has no one to lose anyway, so why not. She lived for herself and herself only.
She learnt and started moving from village to village; helping people, trying to earn little bit of money, in order to survive in day, but became a vicious monster at night.
After spending a month or a little bit more, she abandoned the village.
Two months before her sixth birthday, she ended up roaming in a desert, which resulted in her living in Sungakure for two months.
Mizu met another Jinchuriki like herself, named Gaara.