One such story is 'Replay' by Ken Grimwood. The protagonist keeps reliving his life from high school, trying to make different choices each time.
Another one could be 'The First Fifteen Lives of Harry August' by Claire North. In this story, Harry August keeps being reborn and has to deal with the implications of his repeated lives. It's a fascinating read with a lot of twists and turns.
Well, in the 'Naruto relives his life fanfiction', Naruto could potentially change the relationships in the Hidden Leaf Village. He might be able to reach out to characters like Sasuke in a different way, since he already knows Sasuke's pain and struggles from his first life. This could lead to a more harmonious bond between them much earlier in the story.
In 'harry relives his life fanfic', a possible plot point is that Harry gets to experience different magical adventures all over again. He could explore parts of Hogwarts he missed before or learn new spells earlier. Also, he might be able to influence the wizarding world's politics in a different way this time, like preventing some dark wizards from rising to power as he already knows their tricks.
One possibility is that Percy relives his life and focuses on training more intensively. He could learn new skills or magic earlier, which would change the course of his adventures. Maybe he would be more strategic in battles, and as a result, save more people and gain more respect in the demigod community.
If Percy relives his life, he could completely rewrite the prophecy. He may not make the same mistakes that led him to fulfill the prophecy in the original way. Instead, he could find new ways to deal with the threats to the demigod world, like finding alternative solutions to the problems caused by the Titans and the Giants. He could also have a chance to explore more about his mother's side of the family, which was not much delved into in the original story.
Obviously, Harry Potter himself is the main character as the whole concept is about him reliving his life. His friends like Ron Weasley and Hermione Granger are also likely to be main characters as they are an important part of Harry's life in the original story and will surely play a role in this new scenario.
Obviously, Percy himself would be the main character. Annabeth would most likely be there too, as she is an important part of Percy's life. Grover would also be a likely character, being Percy's best friend.
Sasuke is definitely one. Since Naruto already knows Sasuke's path in his previous life, he could change Sasuke's fate. Also, Kakashi. Naruto might interact with Kakashi differently, sharing his future knowledge which could impact Kakashi's decisions.
He'd likely become more confident. Since he already knows what he's capable of, he can show it right away. For instance, in his first encounter with a monster, he won't be as scared and will be more assertive in using his powers.
I recommend the book,"I Got Hostile with the Sick Male Lead After I Transformed." The male protagonist was mentally ill. The female protagonist was imprisoned by the male protagonist in her previous life and died of illness. After the female protagonist was reborn, the male protagonist dreamed of his previous life. Later, the male protagonist remembered and decided to become a doctor. The plot of this novel was complicated and confusing. The sick male protagonist presented a unique character, but at the same time, there were ups and downs in the plot and a grand atmosphere. I hope you like this fairy's recommendation. Muah ~😗
One such story is the account of Judas Iscariot, who betrayed Jesus and later took his own life.