In a fanfic, Sasuke might discover Naruto is a girl when they are sparring. Naruto's hairpin could fall off or something, revealing her more feminine features. This discovery could shock Sasuke and cause him to be more protective of Naruto. It could also add a new layer of complexity to their rivalry, as now there are different emotions involved.
One idea could be that Sasuke first discovers Naruto is a girl during a mission. Maybe Naruto gets injured and Sasuke has to tend to the wound, and that's when he realizes. This could lead to a whole new dynamic in their relationship, with Sasuke seeing Naruto in a different light and having to re - evaluate his feelings for this person he thought was a boy all along.
It could also have an impact on the overall plot. For example, other characters' reactions to Naruto being a girl could be explored. Some might be accepting, while others might be shocked or even hostile. This could create new conflicts and alliances within the fanfic. Additionally, Naruto's own journey might change as she now has to deal with Sasuke knowing her secret and how that affects her standing in the ninja world.
Another development could be that it causes some conflict within their group of friends. Some might be accepting right away, while others might be skeptical or have concerns about how this will affect their team dynamics. There could be a lot of discussions and arguments about whether Naruto should continue to be part of the group in the same way.
One plot idea could be that as a girl, Sasuke is more open about her emotions from the start. She might form a different kind of bond with Naruto, perhaps a more sisterly or friendly bond initially. Another could be that she faces different challenges in the ninja world because of her gender. For example, some might underestimate her skills at first.
Sasuke could also have a complex mix of emotions. On one hand, he has a long - standing relationship with 'Naruto' as a male friend. Now that he knows Naruto is a girl, he might start to feel a different kind of connection. He may become more protective, but also a bit confused about his own feelings towards this new - found knowledge. He might even feel a bit betrayed that Naruto has hidden this fact for so long.
Another plot could be that Naruto, as a girl, is underestimated by many in the village at first. But Sasuke sees her potential early on. This leads to a special bond between them where Sasuke becomes her protector and mentor in some ways, and Naruto tries hard to prove herself worthy of his attention and respect. They might go on missions together where Naruto's femininity adds a new dynamic to their teamwork.
One possible plot could be that Sasuke uses some kind of rare jutsu accidentally while sparring with Naruto. This jutsu has the side effect of changing Naruto's gender. At first, Naruto is shocked and confused. But then, he (now she) starts to discover new aspects of the ninja world as a girl. For example, she might notice how differently she is treated by some of the male ninja. And Sasuke, feeling guilty, tries to find a way to reverse the effect while also protecting Naruto from any potential harm that could come from this new form.
The plot development could be centered around Itachi's goal to change the future. He sees potential in both Naruto and Sasuke to bring about peace in the ninja world. He starts by training them separately. For Sasuke, he delves into the advanced levels of fire - style jutsu and the sharingan's true potential. With Naruto, he focuses on improving Naruto's speed and reaction time, which are crucial against fast - paced opponents like the Uchiha. As they progress, Itachi then brings them together for joint training. This forces them to learn to work as a team, something that has always been a struggle for them. Their combined skills would then be used to face threats that neither could handle alone.
One plot idea could be Sasuke as a girl trying to break gender barriers in the ninja world. She might face discrimination at first but prove herself through her skills. Another could be a love triangle where she is caught between Naruto and another character in a different way than in the original story because of her being female. Also, she could form an all - girl ninja team and lead them to great achievements, showing that girls can be just as strong as boys in the ninja arts.
Her character development might be different in that she could be more in touch with her nurturing side. Instead of just focusing on revenge, she might also be interested in healing and building relationships. For example, she could be more involved in helping the village recover from disasters or conflicts.
One plot idea could be that they are ninjas in a world where their clans are feuding. To avoid causing more conflict, they keep their friendship a secret. Another could be that they are part of a secret organization within the ninja world that has strict rules about personal relationships, so they have to hide it. Maybe they are also trying to protect each other from enemies who would use their relationship against them.