One reason could be to give him a stronger connection to Hogwarts. As the heir, he might have special privileges or knowledge about the school. Another reason is to add a new dimension to his character. It makes him more than just a student who defeated Voldemort.
There are multiple possible reasons. Firstly, it might be a creative way to expand on the existing lore. By making Harry the heir, the author can delve deeper into the history of Hogwarts. Secondly, it can be used to create a sense of destiny for Harry. Instead of just being a hero by chance (fighting Voldemort), he now has a pre - ordained role as the heir of Hogwarts. This can lead to more complex character arcs and story developments. Also, it could be a means to bring in new characters or magical creatures that are related to this new status of Harry.
Hermione Granger could also be a possible Hogwarts heir. She is extremely intelligent and has a thirst for knowledge about Hogwarts' history and magic. Her Muggle - born status might seem to be a contradiction, but it could also be part of what makes her unique as the heir. She could bring new perspectives and use her vast knowledge to unlock secrets about the heir's role and the future of Hogwarts.
One reason could be to show a more complex side of Harry. By making him the heir of Slytherin, it blurs the lines between the houses and shows that he has qualities from different aspects of the wizarding world.
In the fanfiction world, Harry might be the heir to Hogwarts if there was some sort of magical pact made generations ago. For example, perhaps one of his ancestors had a special role in the creation or protection of Hogwarts, and this role was passed down through the family. It could also be that his unique magical abilities, like his ability to resist Voldemort's attacks from a young age, are signs of a deeper connection to Hogwarts itself. This connection could be what designates him as the heir in the fanfiction's plot.
One reason could be jealousy. Harry is famous in the wizarding world, and some students might be envious of that. So they bully him to make themselves feel better.
One possible reason could be that he was under the influence of a powerful dark magic or a curse that made him lose control. Another reason might be that he was tricked into believing Hogwarts was a threat to the wizarding world in some extreme way. Maybe a powerful enemy manipulated him to think that destroying Hogwarts was the only way to save everyone.
In some fanfictions, Harry Potter can be depicted as the heir of Hogwarts. Fanfiction allows for a lot of creative interpretations. Writers might come up with unique backstories or plot twists that make Harry the heir, perhaps based on some long - lost family connection or a special prophecy within the fan - created universe.
He might have enhanced control over the Hogwarts wards. Since he is the heir, he could be able to manipulate the protective spells around the school more easily than others.
It could also be that the fanfic might interfere with the way he wants his story to be remembered. His adventures at Hogwarts were real and important to him, and when fanfic changes the narrative, it's like his story is being disrespected. For example, if a fanfic portrays him as cowardly when he was actually brave, that would surely make him dislike it.
In some fanfictions, Harry might be expelled for being wrongly accused of using dark magic. Maybe someone framed him by planting dark magic items in his dorm. Another reason could be that he continuously breaks school rules in a way that the school can't tolerate, like sneaking into the Forbidden Forest too many times without permission.
Well, it depends on the specific fanfiction. Some authors might make Harry the heir as part of a grand plot. For example, they could tie it to an ancient prophecy or a hidden power within the school. This can lead to new adventures and challenges for Harry, as he discovers his new role and the responsibilities that come with it.