If Naruto becomes the Kyuubi in the multiverse fanfiction, the story could explore how the world views him. The Hidden Villages might see him as a threat and try to either contain or eliminate him. On the other hand, some might see him as a new form of hope. He could also encounter different versions of his enemies in the multiverse. For instance, a more powerful Orochimaru or a different form of Madara. This would force Naruto to constantly adapt and grow in his new state.
His character would develop in a very different way. He'd have to deal with the isolation that comes with being a feared entity like the Kyuubi. This could make him more introspective and cautious.
Well, if Kyuubi turned Naruto into an Ino fan, it could change the dynamics a lot. Naruto might start spending more time around Ino. He could be influenced by her skills in mind - related jutsu, and perhaps try to learn from her. This could lead to new storylines where Naruto and Ino form an unexpected alliance or friendship. It would also be interesting to see how Naruto's friends like Sasuke and Sakura react to this sudden change in his behavior.
In such a fanfiction, the plot could involve Naruto's transformation causing chaos in the village at first. People who knew Naruto as a boy are now confused. But Naruto (as a girl) is determined to show that she's still the same person inside. She might start wearing different clothes that are more feminine but still keep her ninja gear. Her sensei, like Kakashi, would have to adjust to training a female Naruto, and there could be some humorous moments in their training sessions as Kakashi tries to be more sensitive to her new situation.
One possible plot could be that Naruto's friends initially don't recognize him. Then Naruto has to find a way to communicate with them while in fox form. He might discover new abilities that come with being a fox, like enhanced speed or senses, and use these to his advantage in battles or to solve problems in the Hidden Leaf Village.
One interesting aspect could be the exploration of Naruto's character from a different gender perspective. It might show how Naruto, as a female, would interact with other characters in the Naruto universe in new ways. For example, her relationships with Sasuke or Sakura could have different dynamics, perhaps more complex emotional exchanges due to the change in gender roles.
Well, obviously the gender change of Naruto is a major deviation. In the original story, Naruto is male and his actions and relationships are based on that. In the fanfiction, as a female, her interactions with characters like Kakashi or Jiraiya could be completely different. Jiraiya, for example, might train her differently considering she is female.
If Naruto became an Ino fan due to Kyuubi's influence, he might gain some mental fortitude. Ino is good at mind - related jutsu, and Naruto could learn from her how to better protect his mind from enemy attacks. Maybe he'd start to develop a form of mental shielding similar to Ino's techniques.
Naruto's relationship with his mentor, like Kakashi, would face a big challenge. Kakashi would have to figure out how to train Naruto in this new form. Maybe he'd have to develop new jutsu specifically for Naruto as a fox. Also, Naruto's friends from the village, like Shikamaru and Choji, might treat him more like a pet at first, which Naruto would not be happy about, and this could cause some comical but also tense situations in their relationships.
The plot might involve Naruto being ostracized by some in the village due to his werefox transformation, but finding acceptance and love in an unexpected yaoi relationship. He could meet a new character who is attracted to his unique form and they start to develop a deep connection. This new relationship could help Naruto come to terms with his new identity and powers.