One possible plot could be that Naruto, after learning more about Itachi's true motives and sacrifices, decides to join forces with Itachi in the fanfiction world. They might team up to take on a new common enemy, perhaps an even more powerful Akatsuki member or a threat to the Hidden Leaf that the village's regular forces can't handle alone. Naruto's positive energy and determination could blend well with Itachi's strategic mind and powerful jutsu.
One possibility is that Naruto could try to change the Akatsuki from within. He might use his positive attitude and strong will to influence the members. For example, he could try to convince Hidan to give up his brutal ways, or persuade Kisame to question the Akatsuki's more extreme goals. Since he has a connection with Itachi, Itachi could act as a sort of protector and guide for Naruto within the organization. Naruto might also learn some new and unique jutsu from the other Akatsuki members, which could change his fighting style.
Their relationship would likely start with mutual respect. Naruto already respected Itachi after learning of his sacrifice. Once they join in the fanfiction, they would gradually become friends. They'd rely on each other in battles, and Itachi might start to see Naruto as a younger brother figure, much like Sasuke. Naruto, on the other hand, would look up to Itachi's skills and wisdom.
Well, one possibility is that Naruto could learn a great deal from Itachi. Itachi is highly skilled and intelligent. Naruto might gain new jutsu or a different perspective on the ninja world. They could form a powerful duo, taking on enemies that Naruto couldn't face alone before. Maybe Itachi would teach Naruto some of his unique genjutsu skills, which would make Naruto an even more formidable opponent.
Well, in this scenario, Naruto joining Akatsuki would change a lot. Naruto has always been about hope and unity. In Akatsuki, he'd be surrounded by outcasts with different motives. His influence could either sway some Akatsuki members to his side or get him in a lot of trouble. He might try to change Akatsuki from within, to make it less of a villainous organization. But this would be really tough as many Akatsuki members have deep - seated grudges and goals. For example, Nagato might have a hard time dealing with Naruto's presence as Naruto would challenge his view of the world. And Konoha would be in a very difficult situation. They'd see Naruto as a traitor, and it would be a big blow to their morale.
Itachi might initially be hesitant to fully accept Naruto. But as Naruto proves his loyalty and determination, Itachi would open up more. They could start to collaborate on various missions, and through these shared experiences, their bond would strengthen. Naruto could also introduce Itachi to his friends from Konoha (if they were to interact later), which could further change Itachi's view of the world outside of his own dark past.
Well, one thing that could happen is that Naruto's presence in the Akatsuki would create a lot of internal conflict. The Akatsuki members are used to a certain way of doing things, and Naruto's optimistic and friendly nature would be a contrast. He might try to change the Akatsuki from within, perhaps convincing some members to pursue more peaceful goals. And with a female Itachi, she could act as a mediator between Naruto and the more hardcore Akatsuki members. Maybe she has a different perspective due to her gender and would be more open to Naruto's ideas compared to the original Itachi.
Naruto's character would develop in a very complex way. He'd be constantly struggling between his own values and the actions he has to take as part of Akatsuki. His experience in Akatsuki could make him more cynical as he'd be surrounded by people with dark pasts and motives. However, he'd also try to bring out the good in them, which could strengthen his belief in the power of friendship even more. His view of the ninja world would also change. He'd see the other side of the coin, the outcasts and the reasons they became who they are. This could lead to a more nuanced understanding of the world's problems and solutions.
Naruto's ideals of friendship and peace would likely clash with the Akatsuki's goals. His presence could make some members question their motives. For example, he might try to convince them that there are better ways to achieve power than through collecting tailed beasts. His positive attitude could be infectious and start to change the overall atmosphere of the Akatsuki.
His character could be developed by showing his adjustment to the Fairy Tail world. He could start off as a loner, but gradually open up to the members. His backstory as a ninja could be explored further in relation to the new environment, like how his past actions affect his new relationships.