Fox - A Double-Edged Fate

On the day the Nine-Tailed Fox attacked Konoha, Minato and Kushina gave birth to twins. In an attempt to stop the beast from destroying the village, Minato divides its chakra, sealing it into his two children. However, he died before he could complete the seal on his daughter. What little he'd done undid itself over time, leaving her a seal-less Jinchurikki whose very existence was unknown. Twelve years after the attack, she makes her way back to Konoha, her body no longer human, and stumbles on Naruto completely by accident. The effect they have on each others' lives is almost miraculous: The boy who never had a friend now has a companion for life. And the girl who lost her humanity is slowly finding it again.