One possibility is that Harry leaves Hogwarts to go on a solo adventure to find more about his family's past. He might travel to different wizarding communities that his parents were associated with, uncovering secrets along the way.
Maybe Harry leaves Hogwarts because he feels a greater calling outside the school walls. He could be on a mission to train young, outcast wizards in a more practical and real - world way, far from the structured learning of Hogwarts. He might start a small, hidden school of his own in a remote location, teaching skills that Hogwarts doesn't cover fully, like how to survive in the Muggle world as a wizard without using magic all the time.
One possible plot could be that Harry leaves Hogwarts to hunt down the remaining Death Eaters on his own. He might feel that he can't put his friends in danger anymore and takes it upon himself to rid the wizarding world of the last remnants of Voldemort's followers.
One possibility is that Harry leaves due to feeling like an outsider still. Maybe he discovers some long - hidden family secrets that make him question his place in the Potter family. He could then leave to seek his own identity away from the family name and all the expectations that come with it.
Well, it could be about Harry facing unique challenges in the Triwizard Tournament. Maybe he has to deal with a new dark magic threat that the other champions don't know about. And he might use some new spells he learned secretly.
Maybe Percy leaves the hunt because he has some personal issues to deal with. For example, he might have a family matter that requires his full attention. Or perhaps he has a different mission or goal in mind that conflicts with the hunt.
One possible reason could be that she's frustrated with the school's bureaucracy. For example, if she constantly faces obstacles in getting approval for new study groups or advanced classes. Another reason might be a personal quest. Maybe she discovers a hidden mystery outside of Hogwarts that she can't explore while being a student there.
It could be that there's a powerful enemy that has taken over Hogwarts and Harry, in a desperate attempt to stop this evil from spreading, resorts to destroying the school. He might think that rebuilding it later is better than allowing it to be used for evil purposes. For example, if Voldemort had found a way to permanently taint the magic of Hogwarts, Harry might see destruction as the only option.
In the 'harry potter after hogwarts fanfic', a really interesting plot could be about the discovery of new magical creatures or lost spells. Harry, being the adventurous type, might go on quests to explore these new elements. He could also get involved in international wizarding relations, using his fame and experience to bridge gaps between different wizarding communities around the world. This would open up a whole new world of magic for the readers to explore.
In this fanfic scenario, there are several implications. First, the power vacuum left by Voldemort's death would lead to a power struggle among the remaining dark wizards and witches, but also among those in the Ministry who might want to take more control. Harry leaving could inspire some young wizards to follow in his footsteps and explore the world outside of the UK's wizarding community. The Hogwarts students would grow up in a world where Voldemort is just a scary story, but they would also be curious about Harry, the hero who disappeared. This could lead to a new generation of adventurers in the wizarding world.
One possibility could be that Harry discovers he has some other magical destiny outside of Hogwarts. Maybe he is taken in by a different group of wizards who teach him their own brand of magic in a hidden location. They might believe Hogwarts is too mainstream or that Harry has a special power that needs to be nurtured away from the school.
Well, it could start with Harry nervously asking Ginny to meet him at the Hogwarts grounds. Maybe they go for a walk by the lake, holding hands and sharing stories. They could end up at the Astronomy Tower, looking at the stars and having a really deep conversation about their future together.