In fanfictions where this happens, the development can vary widely. One common way is that Naruto's transformation into the Kyuubi causes a rift in the ninja world. Some villages might see it as an opportunity to attack Konoha while it's dealing with this internal crisis. Meanwhile, Naruto himself is trying to regain his humanity. His friends, especially those closest to him like Kakashi and Iruka, would be determined to help him. They might have to face their own fears and prejudices towards the Kyuubi as they try to reach Naruto. There could also be a sub - plot where other jinchuriki are involved, either to help or hinder Naruto's situation.
Well, in some versions, it might start with the fem Kyuubi having some sort of vendetta against Naruto. Maybe she blames him for something that happened in the Naruto universe. Then she uses her powers to torture him in various ways, like mental torture by showing him his worst fears or physical torture by using her chakra in a harmful way. However, this is all very dark and not in line with the general positive theme of the Naruto series.
Often, the story starts with Naruto realizing the potential of a full merge. Then he has to overcome some internal struggles. After the merge, he usually goes on a power - up spree. He might take on stronger enemies that he couldn't face before.
Well, often in such fanfiction, the change might lead to new relationship dynamics. Sasuke as a girl could have different interactions with Naruto, for example. Maybe there would be more emotional and less combative exchanges at first. The story could explore how Sasuke deals with this new form and the reactions of other characters in the Naruto universe like Sakura, who might be jealous or more protective.
Typically, it starts with Naruto being surprised or even a bit scared of the Female Kyuubi at first. But as he gets to know her better, he realizes she has her own motives and feelings. Then they start to communicate more, which leads to a gradual trust - building process.
Often, in such a fanfiction, the story develops around the chaos that his transformation brings. Since Inuyasha is now a child, his usual brash and confident self is replaced with a more innocent and sometimes naïve version. This can lead to some comical situations, like trying to fight with a smaller body and less strength. His friends have to keep him out of trouble more than before, and there could be a plot where they search for a way to turn him back to normal.
In such fanfiction, their relationship often develops through mutual respect. Naruto no longer sees Kyuubi just as a source of power but as a friend. Kyuubi, in turn, starts to value Naruto's determination and kindness. They might have heart - to - heart conversations in Naruto's mindscape, sharing their past traumas and hopes for the future.
The relationship development can also be influenced by external factors. If the village starts to view Naruto's connection with the Kyuubi in a more positive light, it can ease the tension between them. This allows for more open communication and deeper training sessions. Eventually, they might reach a point where they are like comrades, fighting side by side not just physically but also in terms of their shared goals for the village and the ninja world.
Well, their friendship often begins with Naruto's unwavering determination. He doesn't fear Kyuubi like others do. He tries to communicate with it. This catches Kyuubi off - guard. As time passes, Naruto's positive attitude rubs off on Kyuubi. For example, Naruto might share his dreams of a united ninja world with Kyuubi. Kyuubi, being a powerful and somewhat lonely being, is drawn to Naruto's idealism. They start to form a connection that grows stronger with every encounter, be it in the heat of battle or during quiet moments of self - reflection.
In some fanfictions, after the Kyuubi is extracted, Naruto's relationships play a big role in the story development. His relationship with Sakura could change, for example. She might see him in a new light and become more protective. And with Kakashi, Kakashi could take on a more father - like role in helping Naruto recover. Also, the story could develop into a plot where Naruto discovers a new power within himself that was hidden because of the Kyuubi's dominance all this time.
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.