The outcome of the fight in the 'naruto fights the kyubi fanfiction' is quite uncertain. Naruto has his own set of skills, like his Rasengan and his ability to use shadow clones effectively. On the other hand, the Kyubi has raw power that is almost unrivaled. If Naruto is able to find a weakness in the Kyubi, perhaps something related to its past or its connection to the ninja world, he could win. But if the Kyubi manages to break Naruto's spirit, then the Kyubi would be the victor.
In this kind of fanfiction, Naruto might face a great challenge. He could use his new jutsu that he has learned over time to combat the Kyubi's powerful attacks. Maybe he'd have to tap into some hidden reserves of his chakra.
Another theme is acceptance. Naruto has to accept the female Kyuubi as she is, with her own personality and motives. And the female Kyuubi has to accept Naruto's way of life and his values. This mutual acceptance is often a key part of the story. For instance, in some fanfictions, the female Kyuubi initially doesn't understand Naruto's desire to protect the village, but gradually comes to accept it.
There's 'Naruto and the Female Kyuubi: A New Alliance'. In this one, the female Kyuubi starts off as a somewhat reluctant ally to Naruto. But as the story progresses, they begin to understand each other better. The fanfiction has some really cool action scenes where Naruto and the female Kyuubi fight side by side against common enemies. It also has some emotional moments that are really well - written.
Well, in such a fanfiction, the plot could involve Naruto and Fem Kyubi getting married in a very private ceremony. Then, they have to balance their new life together with Naruto's duties as a ninja. Maybe Fem Kyubi uses her powers to help Naruto in ways that others don't understand, and they gradually reveal their relationship to their closest friends over time as they learn to trust them more.
One great Naruto fanfic about him controlling Kyubi power is often centered around his growth as a ninja. It shows how he overcomes the initial struggle of harnessing such a powerful force within him. As he gradually gains more control, his abilities in combat and his standing in the ninja world improve significantly.
You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Use the search function and type in 'Naruto' and 'Kyubi' to find relevant stories.
One possible plot twist could be that Naruto, while in his Kyubi form, loses control completely and starts to attack his friends. This would create a huge internal conflict for him when he comes back to his senses. Another could be that his transformation into the Kyubi gives him new abilities that are not related to just brute strength, like the power to communicate with other ancient beasts. Also, perhaps the transformation is not permanent, but rather fluctuates based on his emotions, leading to some really tense moments during battles or important interactions.
You can start by looking on fanfiction.net. It has a large collection of Naruto - related fanfics, and you're likely to find many 'naruto y kyubi fanfic' there.
You can try fanfiction.net. It has a large collection of 'naruto x kyubi fanfic' among other Naruto - related fanfictions. Just use the search bar and type in 'naruto x kyubi' and you'll get a list of relevant stories.