John Lennon could be the main character. He was such an iconic figure in The Beatles and had a very creative and out - of - the - box thinking. His journey through time could be filled with self - discovery and new musical inspirations.
It could also be a fictional character who is a huge Beatles fan and somehow gets the ability to time - travel with The Beatles. This character could act as a guide for the band in different time periods, and at the same time, learn a great deal about music and life from them.
John Lennon is often a popular choice. His charisma and creative genius make him a fascinating character to interact with in time - travel scenarios. Writers can explore his thoughts and his impact on the music world from a different perspective.
Shun would also be a good choice. His calm and strategic nature would serve him well in the unpredictable situations that come with time travel. He might be more interested in exploring the historical aspects of Bakugan in different time periods and uncovering secrets that could benefit the present.
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.
It could be a time - traveling villain from the future who wants to change the past to gain more power in their own time. They might try to stop Naruino from achieving their time - travel goals.
Maybe a young journalist. They are curious and eager to discover the truth. In the fanfiction, they could travel back in time to the Treaty of Versailles and report on the events as they unfold. They might expose some behind - the - scenes secrets that could change the outcome of the treaty.
Shido could be an obvious choice as the main character. Since he has a special connection with the spirits in the original story, his time - traveling adventures could add new dimensions to his relationships with them. He could go back in time to understand the origins of the spirits better and find new ways to save them.
A young WW1 infantryman would make a great main character. He could represent the 'old - school' values and combat style of WW1. When he travels to WW2, he has to adapt to the new warfare, and his journey of adaptation could be very interesting to follow.
Issei would be a popular choice. Since he is the main character in the original series, having him time travel would create many interesting storylines. He could use his knowledge of future events and his growth as a character to change things in the past.
Perhaps a time - traveling agent sent from the future. Their mission could be to study the decline of ancient Egypt and try to find solutions to prevent it. This would make for an interesting story as they interact with the people of the past, from the slaves to the pharaohs, all while trying to fulfill their mission.
It could be Nagisa. Since he is one of the central characters in the original series, he would make a great time - traveling protagonist. He could travel back in time to gain more skills or knowledge to better assassinate Koro - sensei, or he might go forward in time to see the consequences of their actions in the classroom.