The development varies a great deal. In some fanfictions, after releasing the Kyuubi on Konoha, Naruto is exiled. He then has to find his own path outside the village. Along the way, he meets new allies who help him understand his power better. He might also encounter new enemies who are interested in the Kyuubi's power. Eventually, he could return to Konoha as a more powerful and wiser shinobi to make amends.
After Naruto releases Kyuubi on Konoha in fanfiction, the story can take many directions. There could be a group within Konoha that tries to rehabilitate Naruto, believing that he was forced to release the Kyuubi due to some external threat. This group might work with Naruto to find a way to prevent future incidents. On the other hand, there could be a conflict between those who want to punish Naruto severely and those who want to give him a second chance. Meanwhile, Naruto himself is dealing with the after - effects of the Kyuubi's release, such as dealing with the memories and emotions that come with the Kyuubi's chakra, and trying to figure out how to use this power in a way that doesn't harm Konoha in the future.
After Naruto releases Kyuubi on Konoha, the story could take a turn towards a redemption arc for Naruto. He would have to face the consequences of his actions and work hard to earn back the trust of the villagers. Meanwhile, other characters could start to explore the reasons why Naruto did what he did, which might uncover some hidden secrets about Naruto or the village itself.
In some fanfictions, the immediate consequence could be destruction. Buildings might be razed and many shinobi could be injured or killed. The village would be in chaos as they try to either contain Naruto or the Kyuubi's power. There could also be a shift in the power dynamics, with some seeing Naruto as a threat and others trying to find a way to calm him down and reseal the Kyuubi.
Naruto's character would likely become more independent. Away from Konoha, he has to rely on himself and the female Kyuubi. He might become more cautious as he no longer has the safety net of his village. His view of friendship could also change. Since he's with the female Kyuubi, he might develop a deeper understanding of different beings and their motives.
One possible fanfiction could be about Naruto forming a unique bond with the female Kyuubi. In this story, Konoha's actions towards Naruto in the past might be re - examined in a negative light. Maybe Naruto, with the help of the female Kyuubi, decides to make Konoha face its wrongdoings. This could lead to a series of events where Naruto challenges the old traditions and power structures in Konoha that have been unfair to him.
Well, in this fanfiction, when Naruto releases the Kyuubi fuuinjutsu, it could completely change the power dynamics in the Naruto universe. His friends might be both in awe and a bit scared of his newfound strength. Naruto would have to learn to control this power quickly, or it could end up causing more harm than good. He might also face new challenges as other villages view him as an even greater threat now.
Obviously, Naruto is the main character as he is the one releasing the Kyuubi. Sasuke could also be involved, perhaps as an ally or an antagonist depending on the plot of the fanfiction. Sakura might be there too, trying to support Naruto in controlling the Kyuubi's power or dealing with the aftermath.
One interesting scenario could be Naruto learning to control the Kyuubi's power in a unique way that wasn't shown in the original series. For example, he might use it to create new jutsu that combine his own skills with the Kyuubi's raw power.
In addition to the well - known characters, there could be new characters introduced in the fanfiction. Maybe there are some ancient ninja clans who have knowledge about the 'fem Kyuubi' and they send their representatives to interact with Naruto. These new characters could bring in new plot twists and conflicts. For example, they might try to manipulate Naruto to use the 'fem Kyuubi' for their own purposes, which would put Naruto in a difficult situation where he has to decide who to trust.
One possible plot could be that Naruto is pushed to the brink by the village's constant mistreatment. The Kyuubi, sensing Naruto's anger and despair, influences him to turn against Konoha. They could start by attacking key strategic points in the village, like the Hokage's office and the ninja academy, causing chaos and destruction.
One well - written female Kyuubi character could be the one who is depicted as having a complex personality. For example, she might be fierce in battle but also show vulnerability when it comes to her relationship with Naruto. Another could be a female Kyuubi who has a strong sense of justice, despite her origin as a powerful and sometimes feared entity. This kind of character adds depth to the fanfiction.