There might be some extremely out - of - the - ordinary fanfictions that create such strange scenarios. However, this is a very abnormal and unethical concept. Naruto's story is mainly about friendship, growth, and protecting the village. These are the core elements that should be adhered to, rather than creating such inappropriate fictional relationships.
In the Naruto canon, Naruto doesn't have a sister, and incestuous relationships are not acceptable in the normal values of the Naruto world. Fanfiction that involves such inappropriate relationships goes against the general positive themes of the original work. It is not something that should be promoted.
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 plotline could be that Lemon has some unique ninja abilities that Naruto discovers, and they train together to become stronger. Maybe she has a special chakra nature that Naruto has never seen before, and they figure out how to use it in combat.
Well, their relationship as siblings would be more of a family - based bond. Unlike with his friends, Naruto and Lemon would have a shared family history and a deeper sense of loyalty that comes from being family. With friends, Naruto has a sense of camaraderie, but with his sister, there's a more innate connection.
One possible plot could be that they discover they are not actually related in a way that was previously thought. Maybe there was a big misunderstanding about their family relations all along. Another could be a story set in an alternate universe where the social norms are different and such a union is somehow acceptable within that fictional world's rules.
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.
At first, they might be a bit awkward around each other since they just found out they are twins. But as they start to train together and face challenges, they become closer. For instance, when they are sparring, they learn each other's fighting styles and weaknesses, which builds trust.
One possible plot could be that Lemon, Naruto's sister, discovers some hidden jutsu that Kushina once knew. Naruto and Lemon then train together to master it. Along the way, they face challenges like other ninja clans trying to stop them as they fear the power of this new - found jutsu. And in the end, they use the jutsu to protect their village and honor Kushina's memory.
Communication is key. Naruto and his sister could sit down and have an honest conversation about what's bothering him. They could clear up any misunderstandings that led to his hatred.
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.
Well, first of all, it violates basic family values. Family members are supposed to have a non - romantic relationship. In the Naruto world, there are strong bonds of friendship and comradeship, and this concept of Naruto marrying his sister completely goes against that. It also sends a wrong message to the readers or fans, especially younger ones who look up to the Naruto series. It's not in line with the positive, healthy themes that the original Naruto story promotes.