A new, original character could be the main character in a Beyblade time travel fanfic. This character could be a young up - and - coming Beyblader who has a natural talent but is still learning. Time - traveling would be a huge adventure for them, as they would be exposed to different Beyblading cultures and techniques. They could grow and develop their skills in unexpected ways during their time - traveling journey and become a legend in the Beyblading world.
A young and curious Pokemon trainer would be a great main character. They're always eager to learn and explore, so the concept of time travel would be both exciting and a bit scary for them. They could start off as an ordinary trainer in their own time, but then through some strange event, get sent back or forward in time.
Oscar could be an interesting main character for a time travel RWBY fanfic. As Ozpin's current host, he has a connection to a long history of events in Remnant. Time traveling could allow him to learn more about Ozpin's past directly, and he could also use his new - found knowledge to change things for the better in the present and future of Remnant.
It could be an original character. Maybe a young wizard who discovers a long - lost time - travel spell. This character could be from a family that has been affected by the dark arts in the past and travels back to change their family's fate. They would then get caught up in the larger events of the wizarding world during that time.
Naruto himself would be a great choice. He has a strong sense of justice and his time - traveling could lead to some interesting changes in the clan wars. He might try to end the wars early and bring peace among the clans. His unique abilities and personality would also make for an exciting story.
The Riddler could be a great main antagonist. He could use his knowledge of time paradoxes and puzzles to try and outwit Batman as he travels through time. He might set up elaborate traps across different time periods that Batman has to solve.
One idea could be that a modern Beyblader gets transported back in time to the origin of Beyblading. He could then learn the ancient techniques and bring them back to the present, revolutionizing the sport. Another idea is that a past Beyblading champion is brought to the future to see how the game has evolved. This could lead to some interesting battles and exchanges of strategies.
A time - traveling pirate who has his own agenda and wants to change the course of pirate history for his own gain could be the antagonist. This pirate might be jealous of Luffy's future achievements and try to stop him from ever becoming the Pirate King by changing things in the past.
Obviously, Sophie is a main character. In many fanfics, her friends like Tyson or Kai might also be important characters. They often support Sophie in her beyblade journey, whether it's by giving her advice or competing against her to make her better.
A scientist could be the main character. He might have been working on a top - secret time travel project and something goes wrong. As a result, he has to become the repairman, using his scientific knowledge to correct the problems in time. He could be an expert in quantum physics or some other relevant field.
Aragorn could be the main character in a Tolkien time travel story. He could travel back in time to learn more about his ancestors and the ancient kingdoms of Men. This would make him an even more powerful leader in his own time as he would have knowledge of the past mistakes and victories of his people.