Often, the main protagonist from the original work is likely to be a common character in this fanfiction. They are usually the ones with the most motivation to go back to the past. For instance, if it's a fantasy series about a chosen one, the chosen one might go back to gain more knowledge or power. Additionally, mentors or guides from the original story could also be present, as they can help the character navigate the past.
It really depends on the source material of the fanfiction. If it's based on a superhero story, it could be the superheroes themselves trying to go back and prevent a villain from getting power in the past. Or if it's a school - based story, the students might be the ones traveling back. Sometimes it can also be a side character from the original story who gets the chance to go back and change things.
Well, often in 'gotta get back to the past fanfiction', the characters' relationships can be a key element. For example, if it's a story about friends going back in time, their friendship might be tested in new ways. There could also be a sense of mystery, like what caused them to go back in time in the first place. And the cultural differences between the present and the past can add a lot of flavor to the story as the characters navigate through it.
Naruto himself is obviously very popular. People love to see how he uses his future knowledge in the past. Sasuke is also a favorite as fans are interested in how his relationship with Naruto might change in this new timeline. Kakashi is another popular one as he often plays an important role in guiding Naruto in the original story, and in the fanfiction, his role can be even more complex and interesting.
Naruto himself is obviously very popular as he is the main character who goes back in time. Sasuke is also popular as Naruto might try to change Sasuke's path in the past. Kakashi is another one, as he has a big role to play in Naruto's development.
Obviously, Harry himself is a common character. Hermione is also often included as she is Harry's closest friend and very intelligent, so she can help Harry figure out how to navigate the past. Ron might be there too, providing some comic relief and loyalty. Dumbledore usually makes an appearance as he has a lot of knowledge and can offer guidance to Harry in the past.
One common theme is forgiveness. Since they had a lot of issues in the original series, forgiveness is key for them to get back together. Another is the power of true love. Writers often emphasize that their love was always there, just buried under all the drama. And there's also the theme of self - discovery. As they try to get back together, they also learn more about themselves.
His friends like Sakura and Shikamaru would be affected too. With Naruto's changes, their relationships with him and with each other could be very different. For example, if Naruto changes the course of events, Sakura might not be as fixated on Sasuke in the same way. And Shikamaru might find himself in different strategic situations due to Naruto's interference.
Kikyo can be a prominent character as well. Her connection to Inuyasha's past is deep. In a time - travel scenario, she could be alive in the time Inuyasha travels back to. This could create a lot of drama as Inuyasha has to deal with his feelings for both Kagome and Kikyo in this new situation, and Kikyo might have a different reaction to Inuyasha's presence since she doesn't know all the things that have happened in the future yet.
Ron is also a common character. He could provide the comic relief as well as be part of the adventure with Harry. Dumbledore might also show up as he is the wise mentor figure. Harry might seek his advice on how to handle the changes he wants to make in the past without disrupting the future too much.
Luna Lovegood could be involved too. She has a unique perspective on magic and the wizarding world. Her presence in the fanfiction could add an interesting and quirky element, especially if she helps Harry in his new situation, perhaps with her knowledge of strange magical creatures or her intuitive understanding of magic.
The Marauders, James, Sirius, Remus and Peter, are often seen in these fanfictions. Since Harry is reborn in the past, he might interact with his father and his friends in a whole new way. This can lead to some really interesting storylines, like Harry helping them with their Hogwarts adventures or even preventing some of the bad things that happened to them later on.