The mysterious jinchūriki

Fumiku Yin-Yang is the daughter of Lin Yin-Yang, the leader of the main branch, and Airi Yin-Yang, a mistress that Lin had an affair with who is in the lowest branch of the clan. On the day of Fumiku's birth, her father decided to curse her with the worse being, thing, beast in all existence. On that day..Lin sealed the Ten-Tails beast into his newborn daughter.
Little did the Yin-Yang clan know, a band of rogue ninja's snuck past security and, one by one, killed each member of the clan. Just before the rogue ninja could find Fumiku and Airi, airi ran with her too start a new leaf.
Finally, when she thought both her and her Fumiku were safe, she collapsed on the ground. There stood in front of her was the gate to Kohohagakure. A which later she managed to lift herself up and stumble into the village.
Just by chance a ninja notice the single mother and newborn child and took them to the Hokage. There the Hokage allowed them to be citizens on one condition, the child will have to become a ninja when she grows up. Airi agreed with no hesitation and thankfully took the money, making a new life with her and her jinchūriki daughter.

And that's where we are now.
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