Sasuke's relationship with Sarada could also be affected. If Sarada experiences things in the past related to Sasuke's family or his past actions, it could make her understand her father better. Maybe she'll come back with a new understanding and they'll have a more open relationship.
Naruto's relationship with his friends from the past could also be different. If he goes back with Sarada, he might interact with them in a different way, trying to protect the future while still being true to his past self. And this could have a ripple effect on all his relationships in the present once they return.
Boruto is very likely to be one of the main characters. As the son of Naruto, he has a strong connection to the original story and would be a natural choice for a time - traveling adventure. Sarada, being Sasuke's daughter, would also be a key character. Her skills and her relationship with Boruto could drive the story forward in many ways.
Obviously, Harry's closest friends like Hermione and Ron. They would be devastated. Hermione would probably be racked with guilt for not being able to prevent it. Ron would be angry and at the same time lost without his best friend.
The main characters would be Naruto for sure. He's the center of this time - travel concept. But we can't forget about the other members of Team 7. Sasuke, with his brooding and powerful nature, and Sakura, who was developing her skills. Also, characters like Iruka - sensei, who was important to Naruto's early development, might also play significant roles. And there could be appearances from other ninja like Shikamaru and Choji, who were Naruto's friends and comrades during his genin days.
Naruto, of course. Since they are in the same team in the original story, it's very likely that Sakura will interact with Naruto. She might try to change his fate or help him in a different way. Sasuke is also a main character she'll interact with. Maybe she'll try to prevent Sasuke from going down his dark path. And Kakashi, as their teacher, will also be involved in their interactions.
They are likely to interact with Naruto's past self. It would be an interesting dynamic as Naruto tries to explain things to his younger self without messing up the timeline too much. And Himawari would be there, perhaps teaching her young father some of her own jutsu.
In 'deception naruto x sasuke fanfiction', not only Naruto and Sasuke's relationship but also their relationships with other characters like Sakura could be affected. For example, if Sasuke is deceived about Naruto, he might act in a way that makes Sakura misunderstand Naruto too. And Naruto, if deceived about Sasuke, might distance himself from Sakura as he focuses on sorting out the situation with Sasuke.
Family members, if he has any in the fanfiction world, would be devastated. His mother, for instance, would have to deal with the loss of her son. She might become more involved in the affairs of the demigod world, trying to make sure that her son's sacrifice was not in vain. Also, his half - siblings, if any, would be affected. They could be inspired to step up and prove themselves worthy of Percy's sacrifice.
Peter Parker would be extremely affected too. Iron Man was like a mentor to him. His death could make Peter question his own abilities and whether he can continue to be a hero without Iron Man's guidance. He might also feel a sense of guilt, thinking that if he had been stronger or more experienced, he could have saved Iron Man.
The nine - tailed fox, Kurama, could also play a major role. Given its long - time connection with Naruto, it may have some influence on Naruto's state of dying or even try to save him in some way. For example, it could share its remaining chakra with Naruto to prolong his life.
Obviously, his close friends like Sasuke and Sakura would be likely to be affected. Since they are often around Naruto, they would be the first ones to experience the nightmares he creates.