In 'Steven Universe Watch the Future fanfiction', Steven is bound to be a central figure. He's the protagonist of the original series, after all. Alongside him, the Crystal Gems - Garnet, Amethyst, and Pearl - are very likely to be main characters. They've been with Steven through thick and thin. Additionally, characters like Peridot, Lapis Lazuli, and Bismuth, who have become important parts of Steven's life in the later parts of the series, could also be main characters. Connie, with her connection to Steven and her own growth in the story, is also a strong candidate for a main character.
The main characters in 'Steven Universe Watch the Future fanfiction' are likely to be centered around Steven. However, the Crystal Gems will be crucial. Garnet, with her combined wisdom and power, Amethyst with her fun - loving and sometimes reckless nature, and Pearl with her grace and knowledge. Peridot could also be a main character as she has her own unique perspective and skills. Lapis Lazuli, given her complex history and relationship with the others, might also be a main character. And of course, Connie, who has been Steven's partner in many adventures and has her own story arc, is very likely to be a main character as well.
If it was a crossover with "She - Ra and the Princesses of Power", Adora could be a main character. Her strong leadership and the power of She - Ra would be an interesting contrast to Steven's more laid - back leadership style. Together, they could fight against a common enemy that threatens both their worlds.
Obviously, Steven and Pink Diamond are the main characters. Steven, with his unique ability to understand and empathize with all beings, and Pink Diamond, with her complex and mysterious past. Their interaction would be the core of the fanfiction.
Obviously, the Marauders themselves - James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew. Since it's about them watching the future, they would be the central focus. They are the ones who will have reactions and make decisions based on what they see in the future.
The main characters are bound to be the core members of the Bat family. Batman is a given as he's the leader. The various Robins are important as they represent different generations and aspects of the family. For instance, Dick Grayson brings his acrobatic skills and his experience as the first Robin. Jason Todd with his more edgy and complex personality. Tim Drake with his detective skills. And Damian Wayne as the son of Batman. Batgirl, with her own set of skills and her connection to the Bat family, would also be a main character. Alfred, who has been with the family for a long time, is also likely to be there as they witness the future.
Obviously, Team Minato itself would be the main characters. That includes Minato Namikaze, Obito Uchiha, Rin Nohara and Kakashi Hatake. They are the core of this story as it's about them watching the future.
It could be a corrupted Gem from the past that was somehow locked away and now resurfaces in the future, angry at the changes that have occurred. This Gem might not understand the new world order and wants to return things to how they were.
Obviously, Pearl is one of the main characters. She's the refined, sword - wielding Gem we know from the show. In the context of Pearl Lemon fanfiction, Lemon becomes a central figure as well. This new character could be anything from a mysterious new Gem to a human with some special connection to the world of Gems. Their interactions and the relationship between them form the core of the fanfiction stories.
In the context of the show's universe, it's a bit of a strange concept. Since fanfiction exists in our real - world fandom and not in the show's world directly. But if we were to imagine a meta - situation where he could access it, I suppose it could be possible. However, it would be a very surreal situation for him.
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 would likely include Ichigo, as he is the protagonist of the original series. He might be facing new challenges in this future scenario. Renji could also be a main character, as his relationship with Rukia and his own growth arc make him an important part of the Bleach universe. And Aizen, even though he was a villain, could play a significant role if the fanfiction explores his possible return or his influence on the future events.