The main characters would be Naruto and the Yellow Flash. However, characters like Sakura could also be important. She might be involved in the medical support during battles or have some emotional reactions to the Yellow Flash's return. Shikamaru could also be part of it. His intelligence could be used to strategize when they face the challenges brought by the Yellow Flash's return. And of course, the village elders might also play a role, as they would be concerned about the implications of such a powerful figure coming back to the village.
Kakashi Hatake would be a great character to pair with the Yellow Flash. Kakashi was Minato's student, and there could be fanfictions exploring more in - depth training sessions or missions they went on together that weren't shown in the original series.
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.
It could be about the Yellow Flash coming back and using his super - fast jutsu to help Naruto in a big battle. Maybe he teams up with Naruto to fight against a new and powerful enemy that threatens the Hidden Leaf Village.
Obviously, Naruto himself would be a main character. His friends like Sasuke and Sakura are also likely to be important. Maybe their children could also play significant roles as they grow up in the post - return to Konoha era.
Obviously, the Yellow Flash himself is a main character. But often, other characters from the Naruto series also show up. Naruto might be involved as he's the main protagonist of the original series. Minato, as the Yellow Flash, could have interactions with Kakashi, his former student. Also, characters like Jiraiya, who was Minato's teacher, could be part of the story, as their relationships can be further explored in fanfics.
Obviously, the Yellow Flash is one of the main characters. He is the center of the 'Second Coming' concept. There might also be his former comrades or friends who were part of his story before his first 'departure'.
It could be a new, previously unheard - of ninja who has the potential to become as great as the Yellow Flash. Maybe a young orphan who discovers some hidden power within themselves.
Obviously, the Flash is one of the main characters. He brings his super - speed and unique personality to the story. And then, of course, members of the Justice League like Superman, Batman, Wonder Woman, etc. Superman with his super strength, Batman with his intelligence and gadgets, and Wonder Woman with her combat skills and Amazonian heritage are all likely to play important roles.
Kakashi could be a great mentor. Since he was Minato's student, he has first - hand knowledge of Minato's techniques. He could teach Naruto the fundamentals of the Yellow Flash's fighting style, like how to control chakra for high - speed movement.
The Akatsuki members could also be involved. If Naruto returns from the dead, they might see him as a threat to their plans or as an opportunity to use his new - found power for their own purposes. For example, Pain might be curious about how Naruto managed to return and what new powers he has.