Maybe in the fanfic, Naruto discovers that his parents' death was not as straightforward as he thought. If he finds out that some powerful individuals in the village were actually involved in a conspiracy that led to their deaths, this revelation could be the trigger for his descent into hatred. He might then turn against the village and its leadership, using his powerful jutsu not for protection but for vengeance.
It could be the Hidden Leaf Village's elders. If they are shown to be manipulative and using Naruto for their own political gains, and Naruto eventually finds out, they would become the main antagonists. He might see their actions as the root of all his problems and turn his hatred towards them for exploiting him.
If Naruto gives into hatred in fanfiction, he might turn against his friends. He could become a much darker character, using his powerful abilities for destruction rather than protection. His relationships would be shattered, and Konoha would likely face a great threat from him.
In a Naruto Gives into Hatred x Fem Kyuubi fanfiction, the story could start with Naruto being pushed over the edge by a major event, like the death of a loved one at the hands of the village. The Fem Kyuubi then appears to him, not as a pure evil force but as a being who understands his pain. They bond over their shared feelings of being outcasts. As Naruto gives into hatred, he starts to adopt the Fem Kyuubi's more ruthless ways of dealing with problems. This could include using extreme force against his enemies, even those who were once his friends. The story could then explore how Naruto tries to find a balance between his new dark path and his old self, or if he even wants to find that balance at all.
The plot could involve Naruto's hatred leading him to make some bad decisions. He might start to target his former friends and allies, believing they have betrayed him. The Fem Kyuu in this fanfiction could be an outcast herself. She sees something in Naruto that she can relate to and decides to help him, even at great risk to herself. They could go on a journey together where she slowly helps him understand the error of his ways.
Naruto would likely become a much darker and more brooding character. His once - bright and determined personality would be overshadowed by his hatred. The Fem Kyuubi, on the other hand, might develop a more protective side towards Naruto, seeing him as an ally in her own goals. She could also become more empathetic as she witnesses Naruto's struggle. Other characters in the story would have to react to this new Naruto. His friends would be shocked and try to bring him back, while his enemies might be both afraid and intrigued by this new, more dangerous Naruto.
The relationship could be a slow - burn type. Given Naruto's state of giving into hatred, he would be very guarded. The Fem Kyuu, on the other hand, would be the one making the first moves to connect. As they spend more time together, they might discover that they have complementary personalities. She could be calm and patient, which would balance out Naruto's now - angry and impulsive self. Eventually, their relationship could develop into a deep friendship or even something more romantic if the story takes that turn.
Naruto might also face hatred by becoming stronger. He trains harder and shows his opponents that he is not someone to be underestimated. For instance, if a group of rogue ninjas hates him because they think he's too idealistic, he proves them wrong by defeating them in combat and showing that his ideals are what make him strong.
One interesting concept could be exploring how the curse of hatred affects different characters in new and unique ways. For example, it might show how a minor character is deeply influenced by the hatred that circulates in the Naruto world, leading to unexpected actions or alliances.