Another consequence could be in his relationships with his friends. Some of his friends might be uncomfortable with the idea of Naruto having the Kyuubi as a slave. They may worry that this new - found power will change Naruto for the worse. However, Naruto could also use this power to better protect his friends and the village. But overall, it's a complex situation that could have far - reaching effects on Naruto's character development and his place in the ninja world.
Perhaps Naruto, through his unwavering belief in his own ninja way and his continuous training, reaches a new level of spiritual connection with the Kyuubi. This connection is so profound that he can influence the Kyuubi's very essence. He may use his positive energy and the respect he has gained from the Kyuubi over time to make the Kyuubi follow his commands, as if it were his slave. It's all about the power of their relationship and Naruto's growth as a ninja.
One consequence could be a huge power boost. Naruto would become extremely strong, which might change the power balance in the fanfiction world. Enemies would be more cautious of him, and allies might rely on him more. Another consequence could be the internal struggle. The Kyuubi has its own will, so Naruto might have to constantly fight to maintain control when it's summoned.
One consequence could be that he becomes extremely powerful. His physical abilities like strength, speed, and endurance are enhanced. He can also use more powerful jutsus with the extra chakra boost from the Kyuubi.
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.
No. Naruto and Kyuubi have a complex relationship. While Kyuubi was initially sealed within Naruto, Naruto gradually gains control over Kyuubi's power and they develop a more symbiotic relationship. Fanfictions that depict Naruto as Kyuubi's slave are likely straying far from the original themes of growth and friendship in the Naruto story.
In some fanfictions, controlling the Kyuubi chakra might change Naruto's appearance. He could have some physical features related to the Kyuubi, like red - tinted eyes or a more ferocious look when using the chakra. Also, his relationships with others might be affected. Some might be in awe of his new power, while others could be afraid of him.
Well, in fanfiction, the Naruto and Kyuubi fusion could lead to a change in how the ninja world views Naruto. He would be seen as an even greater threat or an even more powerful ally. For example, other villages might be more hesitant to engage in conflict with him. Also, his relationship with his friends could be affected. They might be in awe of his new power but also a bit worried about the Kyuubi's influence on him. And on a physical level, his appearance might change, perhaps taking on some of the Kyuubi's features, like his eyes or his hair color getting a more reddish tint.
One possible consequence is that the power balance in the ninja world is completely disrupted. With the Kyuubi's massive chakra and power running free, smaller villages might be constantly in fear of being attacked. Konoha, in particular, would have to find new ways to defend itself without relying on the fact that the Kyuubi is sealed within one of its shinobi.
Well, the Kyuubi itself would probably be changed. Naruto had a deep bond with it. His sacrifice might make the Kyuubi more empathetic towards humans. It could even decide to protect the village in Naruto's memory. On the other hand, the next generation of ninja would grow up without Naruto as their inspiration. They would have to find new heroes to look up to, and the stories of Naruto's deeds would become more like legends, with a bittersweet feeling of what could have been if he had lived.
I'm not really sure as I haven't read that specific fanfiction. But generally, in Naruto fanfictions, if Naruto is the 'fem Kyuubi's slave', it might involve some sort of power dynamic where the female version of the Kyuubi has some control over Naruto. It could be a really strange or unique take on the Naruto universe, exploring different relationships and character developments that are far from the original storyline.