Power and its implications are also common. If Harry has a new identity, it usually comes with different powers or limitations. Writers explore how he uses or struggles with these new powers. In some fictions, he may have to hide his powers to avoid danger, while in others, he uses them to change the wizarding world for the better.
Well, you might want to check out 'Harry's Double Life'. In this fanfic, Harry pretends to be a Muggle exchange student to investigate some mysterious events at Hogwarts.
It could be a random wizard or witch from another school. Maybe a student from Beauxbatons or Durmstrang who crosses paths with Harry before he meets Ron or Hermione. This could lead to a whole new set of adventures and friendships that change the course of the story as we know it.
One popular 'Harry Potter is someone else fanfiction' could be those that reimagine Harry as a different type of wizard, like a wizard from a different magical culture. For example, there might be fanfics where he is more in tune with the ancient magic of the druids.
Maybe it's a powerful noblewoman from within the Seven Kingdoms. A woman who has been overlooked for marriage before but has her own influence and resources. Her marriage to Robert could be a way for her to gain more power and for Robert to gain more support within his own realm.
Maybe he meets an exchange student from a different magical school. For example, a student from Beauxbatons or Durmstrang. They could share their different magical cultures and knowledge with Harry, and together they could face some challenges that require a combination of their unique skills.
There's also 'Harry as a Secret Heir' fanfiction. Here, Harry is not just the Boy Who Lived but has a secret heritage that changes everything. It delves deep into the lore of the wizarding world and creates a complex web of relationships and mysteries. The author does a great job of building suspense throughout the story.
They could go on an adventure to find a lost magical artifact. The two of them would have to face various obstacles, like dark creatures and complex spells set to protect the artifact.