The time travel could put some strain on their relationships at first. Harry might be more focused on seeing his godfather again, Ron could be a bit jealous if Harry's attention shifts too much, and Hermione would be constantly worried about the rules of time travel. But as they work through these issues, they'd likely come out with a deeper understanding and respect for each other. They'd also have to hide their true identities from the people in that time, which would require a lot of trust among them.
They might try to change certain events. For example, they could attempt to save Sirius earlier. Maybe they'd use their knowledge of future events to outwit Voldemort's plans more effectively in that time period.
Harry's personality is deeply influenced by his experiences with Voldemort. In the past, he might be more carefree initially but would quickly become a protector when faced with threats. His presence could inspire those in the past to be braver. Hermione, being the book - smart one, would try to correct historical inaccuracies in magic theory. This could lead to a revolution in the way magic was taught in the past. Ron, with his down - to - earth nature, would probably make friends easily. He could introduce muggle - like concepts to the wizarding world of the past, which might change their view of non - magical people.
The Golden Trio's reactions would be diverse. Hermione would immediately start making mental notes about the new magic education system. She would be interested in how they teach Charms, Potions, and Transfiguration in the future. She might even try to get involved in some of the classes as an observer. Harry would be looking for the sense of community and camaraderie that he had at Hogwarts. If he doesn't find it in the future's system, he would be disappointed. Ron would be a bit overwhelmed by all the new gadgets and advanced magic used in the teaching process. He might long for the simpler days at Hogwarts, but at the same time, he would be curious about the new things he sees.
His relationships with his guild members would also change. He could prevent some of their deaths or mistakes. For example, he might be able to stop Klein from getting separated from the group at the start of SAO. This would lead to a different dynamic within the guild, with more camaraderie and a sense of unity.
Harry would find that fanfiction shows him different sides of his character that he hadn't considered before. It could make him more self - reflective. Hermione would see that the details she thought were so important might not be as crucial to others when they retell their story. She would then have to reevaluate what truly defines their story. Ron would come to understand that their adventures are not just their own, but have become a part of a larger cultural phenomenon. This could make him feel a sense of pride and also a bit of pressure to live up to the fan - created images of them.
Their relationships could develop in many ways. For starters, Harry might look up to James as a father figure he never really got to know. James, in turn, would be proud of his son. Sirius could become like an older brother to all three of the Golden Trio. He'd be protective and also share his wild stories with them. Remus would be a great source of wisdom for them, and Hermione would especially appreciate his knowledge. Ron might be a bit in awe of the Marauders at first, but soon they'd all be joking around like old friends. The relationships would likely be based on mutual respect for their different skills and the common goal of making the wizarding world a better place.
Hermione would start by studying all the new things she could find. Ron would follow Harry's lead most of the time. Harry would use his instincts to figure out who to trust in this new future.
Their relationships could become stronger as they face the new and strange future together. They would rely on each other more in this unfamiliar setting.
If Walter goes back in time, his relationship with Skyler would be completely different. Instead of lying to her about his meth - making activities, he would be honest and they could build a more trusting relationship. They might even have a normal family life without all the secrecy and danger.
The relationship between the Black Knights and Lelouch would also change. If Lelouch goes back in time and is more strategic from the beginning, the Black Knights might be more unified and loyal to him. They would see his long - term vision more clearly and be more willing to follow his every command, which could lead to a more powerful and efficient resistance against Britannia.