What are the reasons why 'naruto marries his sister fanfiction' is inappropriate?

The main problem is that it involves incest, which is morally unacceptable in most cultures. Naruto is a popular anime with a large following, and promoting such inappropriate ideas can distort the positive image of the series.

One possible reason could be to protect her. Naruto might believe that by leaving, he can draw danger away from his sister. For example, if there are powerful enemies targeting him, he doesn't want his sister to get caught in the crossfire.

If such a fanfiction exists, one possible reason could be a mind - control situation. Maybe an enemy uses some powerful genjutsu to make Naruto believe his sister is a threat, causing him to kill her accidentally. Another reason could be a misinformation plot where Naruto is tricked into thinking his sister has committed some unforgivable crime against the village.

The Naruto series is known for its positive values, and the concept of Naruto marrying his sister is not only against those values but also against the general norms of society. Fanfiction often explores different ideas, but this one is in bad taste. In the official story, Naruto has his own love interests like Hinata, and his relationships are based on mutual respect and normal romantic feelings. So, we should focus on the positive and canon aspects of the Naruto universe rather than such inappropriate fanfiction.

One reason could be jealousy. If Naruto is getting more attention or has achieved more in the ninja world, his sister might be jealous and this could lead to her actions that hurt Naruto, either by spreading false rumors or directly confronting him in a hurtful way.

One possible reason could be to protect her. Maybe she has some special power that attracts dangerous enemies, and Naruto, being the strong and protective character he is, seals her power to keep her safe from those who might misuse it.

Another possibility is that they leave because of a sense of disillusionment. They could have witnessed some corruption or unfairness within Konoha's leadership or among the ninja community. This makes them lose faith in the village and decide to start anew elsewhere.

In the world of fanfiction, while there may be some extremely out - of - line and inappropriate ideas, the idea of Harry Potter marrying his sister is not only morally wrong but also a perversion of the characters. The characters in Harry Potter have their own identities and relationships, and this sort of thing would be a complete violation of the integrity of the story. It also goes against the positive values that the series has always promoted, such as family in a proper sense, friendship, and love that is based on respect and normalcy.

The sister could be bullying Naruto out of envy. If Naruto has some special abilities or talents that she doesn't, she might be jealous and lash out at him.

It could be that his sister has some special abilities or talents that the family or the village values more. For example, if she has a very rare and powerful bloodline limit, everyone's attention would be drawn to her. In a ninja world, power and potential are highly regarded, so Naruto might be overlooked because his sister seems to have more of that 'special something' at first glance.