Obviously, Naruto would be the main character since it's about his past seeing the future. Sasuke would also be important as Naruto's relationship with him is central to the Naruto series. Kakashi too, as he is Naruto's teacher and mentor, and his guidance might be influenced by Naruto's new - found knowledge of the future.
Well, the main characters would surely include Naruto, Sasuke, and Sakura. Naruto because of the whole premise of the fanfiction. Sasuke, because Naruto's actions towards him in the past could change based on the future he sees. And Sakura, as she is part of Team 7 and her growth and relationship with the others could be affected. Also, characters like Jiraiya might be important as he was Naruto's teacher and had a big influence on him. His teachings could be different if Naruto has knowledge of the future.
Lucy could be a likely candidate. She is a Celestial Spirit mage, and there could be some connection between her magic and seeing the future through her spirits. For example, maybe one of her spirits has the power to grant her glimpses of the future. Another one could be Jellal. Given his complex backstory and powerful magic, it's possible that in fanfiction, he could develop or already have the ability to see the future as part of his evolution or redemption arc.
Lily Potter would also be involved. She was James' wife, and if James saw something in the future that affected their family, he would surely involve her. Also, Dumbledore might be in the story. He was always a key figure in the wizarding world, and James might seek his advice on what to do with his visions of the future.
Obviously, Naruto himself is the most affected as he has to deal with the knowledge of the future. But his friends like Sasuke, Sakura, and Kakashi would also be deeply affected. If Naruto saw a future where Sasuke was in trouble, he would do everything to change it, which would impact Sasuke's life. Sakura, being Naruto's teammate and also caring about Sasuke, would be involved in any plan Naruto made. And Kakashi, as their sensei, would be there to guide and support them through the changes Naruto tries to make based on his future vision.
Sakura might also be a main character. In the original series, she is part of Naruto and Sasuke's group. Her skills as a medical ninja could be crucial in a story that involves future memories. Maybe Naruto's future memories show a situation where Sakura's medical skills are the key to saving someone important. Additionally, Kakashi could be in it too. His experience and wisdom could help Naruto make sense of his future memories and figure out what actions to take.
Obviously, Naruto himself would be a main character. He's the one from the future, so the story would likely revolve around him. His future self might have different relationships with his old friends like Sasuke and Sakura. Sasuke could also be a main character as Naruto's relationship with him has always been a crucial part of the Naruto story.
Obviously Naruto would be one of the main characters. Since it's about him flashing to the future, he is the central figure through which the story unfolds. Sasuke could also be a main character. Maybe in the future, he has his own new goals or challenges that Naruto has to either help with or oppose. Sakura might also play an important role. She could be a powerful medic - ninja in the future and be crucial in treating the injured during some sort of conflict.
The main characters are Naruto and his comrades. Iruka, Naruto's first teacher, could be in it too. He has always been like a father figure to Naruto. In the fanfiction, he might be one of the first to notice something strange about Naruto's future. Then there are Naruto's other friends from the village like Kiba and Choji. They would all react differently to seeing Naruto's future. Kiba might be more impulsive in his actions to change it, while Choji might be more cautious but still determined to help Naruto have a better future.
Obviously Naruto is one of the main characters since it's about him watching the future. Sasuke would also likely be a key character, given their long - standing relationship. And Kakashi, as Naruto's former teacher, could play an important role too.
Peter is obviously one of the main characters since it's about him seeing the future. His friends, like Ned and MJ, often play important roles too. They could be the ones Peter is trying to protect or they could help him deal with the visions.
Naruto is the central character, no doubt. Hinata could be important as well. If Naruto sees a future related to his family or his relationship with Hinata, she will play a significant role. Additionally, the Hokage, like Tsunade or whoever is in charge at that time, would be important as Naruto may need to report the future he saw to the village leadership to take collective action.