If Harry goes back to his 5th year in a fanfic, his relationship with Cho Chang might be different. He could be more cautious in approaching her, considering how things ended between them. He might also have a different dynamic with the members of Dumbledore's Army. Since he already knows their potential, he could assign tasks more effectively and boost their self - confidence. His relationship with the Hogwarts ghosts could also change; he could interact with them more, seeking their unique insights into the school's history and secrets.
His relationship with Sirius could be different. He might be more careful and not let Sirius get into danger so easily. Also, his relationship with Hermione and Ron could be strengthened even more as he would be more aware of how important their friendship is.
Well, his relationship with the teachers would surely change. He could be more respectful to Snape, knowing what Snape has to endure. And with Dumbledore, he might be more demanding, asking for more help and guidance right away. As for his classmates, he could be more of a leader, guiding them through the tough times. For instance, he could be more inclusive towards Neville, helping him gain more confidence much earlier.
Well, he might be able to change some of the bad things that happened. Maybe he could stop Umbridge from being so cruel. He could also be better prepared for the challenges that year brought, like the fight against Voldemort's forces.
His relationship with Sasuke would be very different. If Naruto stops the Uchiha massacre, Sasuke may not have the intense hatred he had in the original story. They could grow up as friends without the need for Naruto to constantly chase after Sasuke to bring him back.
With Ron, they might not be as close as they were at Hogwarts. Ron might be a bit jealous if Harry does really well in college. But on the other hand, they could also bond over missing Hogwarts and their old adventures.
His relationship with Hermione and Ron would be strained at first. They would be confused and a bit scared. But as they see Harry resist the dark side, they would become more supportive. With Dumbledore, there might be a new level of secrecy and mistrust at the start, but Dumbledore would likely keep an eye on Harry to see how he develops. As for the other students, many would be afraid and avoid him, but some might be curious and try to befriend him to see what it's like to be around the heir of Voldemort.
His relationship with his former sensei, Iruka, would be really interesting. Naruto could go back and show Iruka how much he has achieved, which would be a really heartwarming moment. And with Kakashi, he could share his experiences as Hokage and maybe even learn some new things from Kakashi in the past.
With Hermione and Ron, it would be very different. If Harry is de - aged, they might see him as a younger, more vulnerable friend. Hermione could become even more protective, like an older sister. Ron might be a bit confused at first but would probably still be his loyal friend. Their dynamic would shift from equals to something more like Harry being the 'little one' they need to look after.
His relationship with his enemies like Voldemort would also be affected. If Regina has some sort of power or influence over Harry, Voldemort might see him as an even greater threat or an easier target. Harry might also have different ways of defending himself, influenced by Regina's methods or the new environment he's in. For example, Regina might have her own way of dealing with dark magic that she teaches Harry, which changes how he approaches Voldemort and his Death Eaters.
His relationship with the teachers would also be different. Snape, for instance, might be more conflicted about Harry. On one hand, he's in Slytherin which Snape favors, but on the other hand, he's still Harry Potter. And Dumbledore would have to watch Harry from a different perspective, perhaps guiding him in a more subtle way to make sure he doesn't get too influenced by the darker aspects of Slytherin house.
Sirius Black can be a very popular character in 'harry potter 5th year fanfic'. Since he has a close relationship with Harry, fanfic writers might focus on his interactions with Harry during this year. Maybe he gives Harry some secret advice about dealing with the Ministry or the Death Eaters, which adds an extra layer of intrigue to the story.
Well, for Naruto and Sasuke, their relationship might become even stronger earlier. In the past, they could train together more and understand each other's pain from the start. Sakura might be more assertive in her relationship with Sasuke, as she has the knowledge of what will happen in the future. She could try to prevent Sasuke from going down a dark path right from the beginning. And among the other members of Konoha 12, they might form closer bonds as they rely on each other more in this strange new situation of being in the past.