Yes, it is quite a popular concept. Many fans are intrigued by the idea of Naruto having a romantic relationship with the female Kyuubi. It adds a new dimension to the Naruto universe, exploring different dynamics and character interactions. The idea of a human - tailed - beast relationship in a romantic context is unique and allows for creative storytelling. It often involves Naruto understanding the female Kyuubi on a deeper level, and they might share some special moments that are not present in the original story.
One possible aspect could be a story about Naruto befriending the female Kyuubi. In many fanfics, they might start with Naruto trying to understand the Kyuubi's female form better. Maybe he discovers that she has a different personality compared to what he expected from the regular Kyuubi. For example, she could be more gentle and protective in a way that surprises Naruto.
Their relationship could also grow through mutual respect. The female Kyuubi respects Naruto's strength and determination, and Naruto respects her power and the fact that she has been trapped for so long. This respect can lead to a friendship or even something more as they rely on each other more and more in difficult situations.
Their relationship could start with mutual understanding. Naruto, who has always had a connection to the Kyuubi, now with a female form, could start to see her as more than just the beast inside him. They could have conversations about his dreams and her past.
There's also 'Kyuubi's Daughter and Naruto'. This fanfic focuses on the interactions between Naruto and the female Kyuubi character. It has some really good action scenes intertwined with their relationship building. The author does a great job of portraying the emotions and the power dynamics between them. However, the pacing can be a bit off in some parts, but overall it's an enjoyable read.
No. In the Naruto series, Naruto is the host of the Kyuubi, not its slave. Fanfics might deviate from the original concept, but in the official story, Naruto has a symbiotic relationship with the Kyuubi. He gains power from it and eventually befriends the Kyuubi spirit.
In a fanfiction, the female Kyuubi might be initially hostile towards Naruto. But Naruto, with his kind heart, tries to reach out to her. He shares his dreams and fears with her. The female Kyuubi is intrigued by his honesty and starts to soften. They then go through various adventures together. Naruto gets injured protecting her once, and that's when she realizes she has fallen in love with him. Their love then becomes a force that helps Naruto in his battles and also changes the way the village views the Kyuubi.
It could be an original character created by the fanfiction author. This character might be a descendant of the original Kyuubi, but with a female form and her own distinct personality.
I'm not sure if there is such a specific fanfic. Fanfics cover a wide range of themes and ideas, but this one seems rather unusual and might not be very common. However, the Naruto fanfic community is vast, so it's possible that it exists out there somewhere.
One common theme is the power of love to overcome differences. Since Naruto is a human ninja and the female Kyuubi is a powerful, other - worldly being, their love has to bridge this gap. Another theme is redemption. The female Kyuubi might have a past full of chaos and destruction, but through Naruto's love, she could find a new path.