The plot might revolve around Naruto having to overcome some internal struggles while being trained by the Kyuubi. Since the Kyuubi is a force of nature, it has a different mindset from humans. Naruto would have to learn to balance his own values with the Kyuubi's more primal and power - hungry instincts. This internal conflict could lead to some interesting character development, such as Naruto becoming more assertive in battle and in his relationships with others.
Well, it could be about Naruto learning unique combat techniques directly from the Kyuubi. The Kyuubi, being a powerful and ancient entity, might teach Naruto some forgotten or forbidden jutsu. This would set Naruto apart from his original training path in the canon series. Maybe he'd learn how to use the Kyuubi's chakra in a more controlled and strategic way, like creating chakra shields or new types of elemental attacks.
Well, in such a fanfiction, it might be that Naruto becomes extremely powerful like a god. Since he is trained by the Kyuubi, he could gain unique powers and abilities. Maybe he masters the Kyuubi's chakra in ways no one else has. He could use this power to defeat powerful enemies, protect his village in extraordinary ways, and perhaps change the entire shinobi world with his new - found god - like strength.
If Naruto is trained by Kyuubi in a fanfic, it would change a lot of things. Firstly, Naruto's relationship with the Kyuubi would shift from a more adversarial one (initially) to a mentor - student relationship. Kyuubi could train Naruto to use its chakra more efficiently, which would enhance Naruto's physical abilities like speed, strength, and endurance. Naruto might also gain a deeper understanding of the nature of chakra itself. Kyuubi could pass on some of its ancient knowledge about the ninja world, and this could help Naruto in his quest to protect the village and his friends. Moreover, Naruto's standing in the ninja world would rise even more as he becomes more powerful under Kyuubi's tutelage.
Well, in this fanfiction, perhaps the female Kyuubi has a special connection with Naruto. She might train him not just in physical combat but also in mental strength. She could expose Naruto to illusions that are based on her own experiences as a powerful being. Through this, Naruto learns to break free from powerful mental restraints and becomes even more confident in battle.
The Akatsuki could still be the main antagonists. Even with Naruto's training by the Kyuubi, they would be after the tailed beasts. Their goals of collecting all the tailed beasts would put them in direct conflict with Naruto. And they have some really powerful members like Pain and Itachi.
In this fanfiction, a major plot point might be Naruto facing new and stronger enemies. With the training from the female Kyuubi, he becomes a target. Enemies could be after the secrets of his newfound power. Also, the training could involve Naruto learning to control the Kyuubi's power without losing himself. This is crucial as in the original series, Naruto often struggled with the Kyuubi's influence. The female Kyuubi might have a different approach to teaching Naruto, which could lead to interesting character development for Naruto as he overcomes his inner demons and gains more confidence in his abilities.
One possible plot could be that Naruto starts off as his normal self but as he is trained by the fem Kyuubi, he gradually gains godlike powers. He then uses these powers to protect Konoha from a new, powerful threat.
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.
His confidence would soar. With Kyuubi's training, Naruto would realize his true potential and become more self - assured. He'd be less likely to doubt himself in battles.
Naruto might become more in tune with the Kyuubi's power. He could access more of its chakra easily and use it more effectively in battle. For Hinata, she may gain a new sense of boldness. The training could make her less shy and more assertive in combat situations.
Yes, there are likely fanfictions with such a concept. The idea of a 'godlike' Naruto trained by the female Kyuubi is an interesting and popular concept in the Naruto fanfiction community. It allows for unique storylines and character developments.