Well, it could show Harry involved in special missions or tasks assigned by the Queen to protect the magical and non-magical worlds.
One possibility is that Harry is enlisted by the Queen to use his magical skills to solve complex magical problems that threaten the monarchy. Maybe he's also involved in diplomatic efforts between the magical and non-magical governments under the Queen's orders.
Perhaps in the fanfiction, Harry serves the Queen by uncovering and stopping dark magic plots aimed at destabilizing the monarchy. Or he could be providing magical protection for important royal events and places at the Queen's behest.
In this fanfiction, Harry Potter would interact with the Queen in a very unique way. Since he is used to the hierarchical system in Hogwarts, he would understand the importance of showing deference to the Queen. He could offer her a magical gift, like a charm that gives good luck. And the Queen, being curious, might ask him about his world. Harry would have to be careful not to reveal too much about the wizarding world to the muggles, but still satisfy her curiosity. There could be some misunderstandings too, for example, when Harry tries to explain some magic concepts using wizarding terms that the Queen doesn't understand.
In the fanfictions, Harry being a kid might involve his reliance on adults for support, his excitement over simple magical discoveries, and his efforts to fit in at Hogwarts while still having that childlike charm and vulnerability.
Well, in this fanfiction, Harry might be a professor because of his extensive knowledge and experience in magic. He could be teaching younger students and sharing his wisdom.
Harry could be powerful in the fanfic because he's mastered advanced spells or has discovered unique magical artifacts that give him an edge.
One way is through the detailed setting of Hogwarts itself. The castle's layout, the different houses, and the various locations within it like the Forbidden Forest and the Room of Requirement are all elements that fanfiction writers can use to create unique stories. They can describe new events happening in these familiar places. For example, a fanfiction could be about a secret passage that leads to an undiscovered part of Hogwarts.
Well, in some fanfics, Harry Potter might use his magical knowledge and experiences to establish a school with unique teaching methods and courses.
Well, sometimes it's because he did something really naughty or broke a major rule at Hogwarts.
In many fanfictions, Harry might send a howler when he's really angry or wants to make a bold statement. It's usually a dramatic moment.
Well, some fanfics might show more of the emotional impact it had on Harry. They might describe his inner thoughts and struggles in detail.
In the fanfiction, Harry could be like Alissa in terms of their approach to friendships, always being loyal and supportive. Or perhaps they have a similar sense of justice and a willingness to stand up for what's right, no matter the cost.