Obviously, Harry Potter himself would be the main character. Hermione and Ron might also be involved, as they are Harry's closest friends. They could be amazed or even a bit skeptical about Harry's experiences in Skyrim.
Maybe Harry Potter brings some unique magic or skills he learned in Skyrim back to the wizarding world. He could use Skyrim - style combat magic to fight Voldemort's forces.
The setting in which Harry disappears and returns also matters. If it's in the middle of Hogwarts, the school would be in chaos. Teachers would be trying to keep the students calm while secretly searching for Harry. And when he returns, the reactions of different houses - Gryffindor being relieved and proud, Slytherin perhaps being suspicious - could add more layers to the story.
The following are some recommended novels about the return of undercover agents: " Power Battle: Dancer and Empress ": The female protagonist was a dancer and a spy, while the male protagonist was also a spy. The two of them started a thrilling story in the power struggle. This novel matched the given information. The male protagonist returned from undercover.
The theme of sacrifice could also be present. Maybe Harry disappeared because he sacrificed himself for a greater good. And his return could be a sort of resurrection, where he has to deal with the consequences of his sacrifice and how it has affected the wizarding world.
Another theme is the adjustment to a new life. Harry has to get used to living with someone in a different way than he was used to before. He may have to share his space, make compromises, and this is often explored in these stories. It also shows how his friends and the wizarding community react to his new married status.
Neville Longbottom can be a popular character in such fanfiction. In the original series, he grew into a strong and brave wizard, and in the fanfiction of Harry Potter's return, he could be a key figure in the wizarding world. Luna Lovegood might also be a popular character as her unique perspective and magical abilities can add interesting elements to the story.
He might run into some of his old professors like McGonagall. She would be glad to see Harry back at Hogwarts. And perhaps he'll also meet some new students who look up to him as a hero. These new students could ask Harry for advice on how to be brave in the face of danger and how to master difficult magic spells.
In the fanfic, Harry Potter could meet the new generation of students. They would be in awe of him. He might also encounter some of the ghosts, like Nearly Headless Nick, who would surely have some interesting stories to share since Harry left. And there's a good chance he'll meet the caretaker, who would probably give him a hard time about coming back and causing a stir. Moreover, he could cross paths with some of the older students who idolize him and want to learn from his experiences.