Secondly, focus on the relationship between Naruto and the reader. It could be a friendship, a romantic relationship, or a mentorship. Make sure to show the development of this relationship through different events. For instance, if it's a friendship, they could start off as rivals and gradually become friends through shared experiences like fighting a common enemy.
First, you need to have a solid understanding of the Naruto universe. Know the characters, the settings, and the overall plot. For example, Naruto's character traits like his determination and his love for his friends should be reflected accurately. Then, create an interesting backstory for the reader - character. Maybe they come from another hidden village with a unique power.
Finally, don't be afraid to add your own twists to the story. Maybe introduce a new jutsu or a new type of ninja. But make sure it still fits within the Naruto universe. Also, use vivid descriptions to bring the story to life, like describing the chaos of a battle or the beauty of the Hidden Leaf Village.