One possible motive could be jealousy. Maybe the sister is jealous of Naruto's popularity, his strength, or the attention he gets from others in the village.
The relationship could start with Naruto being overly protective of his sister, but she wants more independence. This causes friction. Later, when she gets into trouble that only Naruto can help her with, he steps in. This makes her realize that his over - protectiveness comes from love, and they begin to repair their relationship. For instance, if she is kidnapped by a powerful enemy, Naruto uses all his skills to rescue her, and during this process, they have heart - to - heart conversations.
One idea could be that their own village betrays them. Maybe there's a power - hungry leader who sees Naruto and his sister as threats to their new regime. They could be framed for a crime they didn't commit and then forced to flee the village. In the process, they might have to rely on some unlikely allies they meet on their journey, like a group of outcasts who also have a grudge against the village.
It could bring them closer. Having to learn and speak English together would mean they rely on each other more. They would share the struggles and the joys of mastering a new language, which would strengthen their bond.
The impact would be huge. For one, all of Naruto's friends like Sasuke and Sakura would be devastated. Their whole world view which was centered around Naruto's positive influence would be shattered. Also, the village of Konoha would lose its greatest hope for the future. Naruto was seen as the one to bring about change and peace, so without him, the village might descend into chaos or be more vulnerable to outside threats.
This is not an acceptable theme at all in Naruto fanfiction. Incestuous relationships go against basic moral and ethical norms, and Naruto's world also adheres to certain values. Such a theme would be considered very inappropriate and deviate from the positive and family - like relationships depicted in the original Naruto series.
In this fanfiction, Naruto's ninja skills could play a role in his sister's protection. He might teach her basic self - defense moves early on. Also, his friends in the village could become like aunts and uncles to his sister, providing different kinds of support and influence. For instance, Sakura could teach her some medical knowledge.
One big problem is that it violates ethical norms. Incestuous relationships are generally not acceptable in society and also go against the family values presented in the Naruto series. Family members in Naruto are supposed to support and protect each other in a non - romantic way.
They could start by having some friendly competitions. For example, in a race to the top of a mountain or a sparring match. This would not only show their bond but also their competitive nature as siblings.
Well, some of his friends could be really curious about his sister. They might start including her in their group activities. Naruto would then have to balance his time between his friends and his new - found family relationship with his sister. His friends might also learn a lot from his sister if she has some special skills or knowledge.