Well, his return would bring back a lot of memories. Some of his friends might have moved on in different ways, so there could be some initial awkwardness. But overall, they would be glad to have him back. They might also look to him for guidance in new problems that the wizarding world is facing, since he has so much experience dealing with danger.
For his old friends, Harry's return would be a mix of emotions. They would be happy, of course, but also a bit worried. Worried that the peace they've managed to build in the wizarding world might be disrupted again. However, they would also know that with Harry back, they are stronger together. Harry's presence could also re - ignite their sense of purpose and adventure, which might have faded a bit over time.
Hermione would be overjoyed. She'd probably start researching immediately how it happened and what implications it has for magic. Ron would be both happy and a bit in awe, like he was when they first became friends with Harry. For Ginny, it would be a huge relief and she'd be very emotional, as she lost the love of her life.
His friends might be overjoyed at first. But then, they could also feel a bit of unease. For example, Hermione might be worried about the implications of his return and how it fits into the laws of magic they know. Ron, on the other hand, might be more focused on just having his friend back and want to jump right back into their old adventures.
Well, initially, his friends would be shocked. But as time goes on, they would adapt. Hermione would use her vast knowledge of magic to try and understand the nature of Harry's transformation. Ron, on the other hand, would be more focused on how Harry is feeling in this new form. Their friendship would be tested in a way, as they have to deal with the stares and whispers from other students. However, they would stay by Harry's side, and this experience might even bring them closer as they face this new and strange situation together.
Hermione would probably be very curious at first. She'd want to research all about the Peverell family to understand the significance of Harry's decision. Ron, on the other hand, might be a bit more confused and a little worried that Harry is trying to distance himself too much from their group. But overall, they would support him because they are his true friends.
His friends would be extremely worried. Hermione, for instance, would likely try to find him using all her knowledge and resources. She'd be scouring every book and magical spell she knows to track him down. Ron would also be concerned and probably want to go after him right away, but he might be a bit more hesitant about how to actually do it.
It could strengthen their bond. They could sit together and laugh about the crazy ideas in the fanfiction. Sharing this experience of reading about themselves in different scenarios would give them more things to talk about and joke around with.
His friends might be initially terrified. Hermione, for example, would be both scared and immediately start researching how to reverse it. Ron would probably be more shocked and not know how to react at first. Their friendship would be tested as they try to figure out what to do. They might have to keep Harry's transformation a secret from other students to protect him from being hunted or experimented on.
One possible reason could be a dark magic spell gone wrong. Maybe some wizard tried to experiment with a time - altering spell and accidentally reversed whatever transformation Voldemort (Riddle) had undergone. Another reason might be related to some ancient magic artifact. If Riddle's essence was somehow bound to an object, and that object was tampered with, it could bring him back to his old self.
Economically, Aegon's return could be a game - changer. If he starts another conquest, there would be destruction of property and disruption of trade routes. On the other hand, if he manages to bring stability, it could lead to new economic opportunities. He could also introduce new forms of governance that might have an impact on how resources are distributed and economies are managed in the different kingdoms of Westeros.
It would strengthen their bond. His friends would be in awe of Harry for catching such a dangerous and elusive figure. They would see Harry as even more of a hero, and it would bring them closer together as they deal with the aftermath. For example, Hermione would be eager to research all about Peter and what his capture means, and Ron would be proud to have Harry as his best friend even more.