The plot of a 'naruto frees kyuubi fanfiction' might involve an external threat to the village. This threat is so great that Naruto realizes he needs the full power of the Kyuubi, not just the limited access he has through the seal. So, he starts to work on breaking the seal. Along the way, he has to face opposition from some in the village who fear the unleashed Kyuubi. But Naruto is determined. He finally frees the Kyuubi and together they defeat the external threat. After that, the Kyuubi decides to stay with Naruto as a friend and ally, seeing the true nature of the young ninja.
One possible consequence could be a shift in the power dynamics in the Naruto universe. If Naruto frees the female Kyuubi, she might become an ally. This could change how battles are fought as she could bring her unique powers to help Naruto and his friends. For example, she might have different abilities compared to the regular Kyuubi, like more refined chakra control which she could teach Naruto.
The main characters would be Naruto and the Kyuubi. However, characters like Jiraiya could also be significant. Jiraiya, being Naruto's teacher, might have left behind some knowledge or clues that Naruto uses to figure out how to free the Kyuubi. And of course, Sasuke could be involved too. Maybe Sasuke has his own reasons for either helping or hindering Naruto's attempt to free the Kyuubi, which could add more drama to the story.
In the 'naruto frees kaguya fanfiction', Naruto could free Kaguya through a series of events. Firstly, he might discover a hidden weakness in the seal that binds her. Then, he'd have to battle those who are protecting the seal. His Uzumaki blood and the Nine - Tails' power could play a crucial role. Once Kaguya is free, she may be grateful to Naruto and share some ancient knowledge with him, which could help in the development of the ninja world.
In this kind of fanfiction, one possible plot could be that Naruto discovers a hidden ancient jutsu. With great determination and after many trials, he manages to use this jutsu to break the seal that binds Kurama. Then, Kurama, instead of being hostile as expected, actually thanks Naruto for freeing it. They form an even deeper bond and decide to work together to protect the Hidden Leaf Village from a new and powerful enemy that is approaching.
The antagonists could be a secret organization within the Hidden Leaf Village itself. They are afraid that if Kurama is freed, it will bring destruction to the village. They think Naruto is being reckless and they will do anything to stop him, including framing him for crimes he didn't commit and turning his friends against him, all in an effort to keep Kurama sealed.
One possible plot could be that Naruto, with his strong sense of justice and determination, discovers Jenova being held captive in some strange, other - worldly prison. Using his ninja skills like shadow clones and rasengan, he battles the guards or forces holding Jenova. He then frees her, not fully understanding the implications. Jenova, being a complex and powerful entity, initially sees Naruto as a tool but eventually starts to respect his unwavering will.
Sakura could be a great help. Her medical skills could come in handy if Naruto gets injured during his battles or difficult encounters while trying to free the tailed beasts. Also, her combat skills have improved over time, so she could fight alongside Naruto.
In this fanfiction, Naruto might face many challenges while freeing the tailed beasts. He could have to battle against powerful enemies who want to keep the tailed beasts captive for their own evil purposes. Also, he would need to gain the trust of the tailed beasts which might not be easy as they have been used and abused for a long time.