Itachi would be very strict in Naruto's training, but also very caring. Naruto would look up to Itachi and try to learn as much as he can from him. As Naruto grows, he might start to have his own ideas which could sometimes clash with Itachi's. But through communication and understanding, their relationship would become deeper. Itachi would share his past experiences with Naruto, which would make Naruto understand the complexity of the ninja world better, and in return, Naruto's innocent and determined nature would slowly change Itachi, making him more hopeful about the future of the ninja world.
Another plotline might involve Itachi protecting Naruto from the Akatsuki. Since Itachi has his own motives within the Akatsuki, he could use his position to keep Naruto safe from the other members who might be after the Nine - Tails. It would add a lot of tension and drama to the story, especially when Itachi has to balance his loyalty to the Akatsuki and his new - found role as Naruto's protector.
Well, one possible plot could be that Itachi, seeing Naruto's loneliness and potential, decides to adopt him. This could lead to Naruto having a new sense of family and Itachi guiding him in his ninja training. As for Naruhina, Itachi might play a role in bringing them closer, perhaps by setting up situations where they have to work together and get to know each other better.
Well, it could be that Itachi sees the potential in baby Naruto and decides to protect him from the dark forces in the ninja world. Maybe Itachi wants to raise Naruto to be a powerful and kind - hearted ninja, away from the hatred that plagues their village.
Kakashi could also play a role. He has been Naruto's mentor for a long time. So, he might have some mixed feelings about Itachi adopting Naruto. He could be suspicious of Itachi's motives at first but then gradually come to understand Itachi's positive influence on Naruto. Their interactions could be really fun to read about, especially when Kakashi tries to give Itachi some advice on how to handle Naruto's wild nature.
In this fanfiction, Itachi is the catalyst for change in Naruto's life. He's the one who provides a new family structure for Naruto. Naruto, being the main character, will experience a different kind of growth with Itachi's presence. His relationship with Hinata will also be affected. Hinata, on the other hand, will have to adapt to Itachi's presence in Naruto's life. She may look to Itachi for advice on how to better understand Naruto and how to strengthen their relationship, while also dealing with her own insecurities and the new family dynamic.
The main characters are Itachi and Sakura. Itachi, who has his own tragic backstory and a deep sense of duty. And Sakura, who is constantly striving to improve herself. In this fanfiction, other characters might also be involved, like Sasuke, since Itachi's actions regarding Sakura could potentially affect Sasuke in some way. But Itachi and Sakura are the ones the story primarily focuses on.
The plot could involve Itachi noticing Sakura's isolation within her own team at some point. He decides to adopt her in a sense, like becoming a mentor to her. Itachi could share his insights on how to deal with powerful enemies and the sacrifices one has to make for the greater good. Sakura would then grow not only in her combat skills but also in her understanding of the complex world of ninjas. She might start to see things from a different perspective, similar to Itachi's, which could cause some friction and also growth within her relationships with Naruto and Sasuke.
The child could be an orphan from a small, destroyed village that Naruto comes across during one of his missions. This child might have lost their family to a powerful enemy and Naruto feels a sense of responsibility to take them in.
One interesting aspect of Naruto Rule 63 Itachi fanfiction could be exploring Itachi's character from a different gender perspective. In these fanfictions, Itachi might have different relationships with other characters. For example, his bond with Sasuke could be portrayed in a new light, perhaps with more emotional nuances due to the gender - swap. Also, the way he approaches his mission and his loyalty to the village could be re - examined through this new lens.