One common theme is power struggle. Harry has to grapple with the power of the Venom symbiote. Another is identity crisis, as he is no longer just Harry Potter but also has this new, alien part of him. And there's often a theme of secrecy too, since he can't just go around showing off his Venom - like powers in the wizarding world.
One common theme is redemption. Venom, being a more complex anti - hero, often has a journey towards redemption in these fanfics, especially in relation to Spiderman. They might start off as enemies, but gradually Venom starts to see things from Spiderman's perspective.
One common theme is the clash of two different power systems. Magic from Harry Potter and the symbiotic powers of Venom. Another is the exploration of how different characters from both universes would interact.
The idea of Venom being an outcast is also common. Fanfictions may show how he tries to find his place in the world, whether it's among humans or in a world of his own kind. It adds depth to the character and makes for an engaging read.
Well, in these fanfics, a common theme is the struggle against the odds. Harry might face challenges like lack of proper tools or difficult customers, but he overcomes them. Also, the theme of growth is present. He starts as a novice perhaps and grows into a skilled mechanic. And sometimes, there's a bit of a mystery involved, like when he has to figure out what's wrong with a particularly tricky car.
A frequent theme is the exploration of the wizarding world's social hierarchy. As a lord, Harry is thrust into a different social stratum. He has to navigate the politics, alliances, and rivalries among the noble families. This often involves dealing with ancient family feuds and forging new relationships. It also includes themes of legacy, as Harry discovers what it means to carry on a family name in a more formal, lordly way.
One common theme is power and privilege. When Harry is nobility, he often has to navigate the power dynamics within the wizarding world's noble families. Another theme is identity. Harry has to figure out how his new noble identity fits in with his existing self - the boy who grew up with the Dursleys.
One common theme is acceptance. In many of these fanfics, Harry's friends learn to accept his autistic traits. Another theme is struggle, as Harry has to deal with the wizarding world which may not always be accommodating to his needs.
One common theme could be how Harry's German heritage affects his relationship with other characters. For instance, it might change the dynamic with Hermione and Ron as they come from different cultural backgrounds.
Common themes often include power dynamics. Since Harry is a demon, he may have new and different powers. Fanfics might explore how he uses or controls these powers, and how they affect his relationships with others like Hermione and Ron. Also, the theme of redemption can be present. Even as a demon, Harry may strive to do good, and the story could be about his journey towards redemption.
One common theme is the power aspect. Since both Harry and Merlin are powerful in their own rights, fanfics often explore how their combined powers would change things. For example, they might be able to defeat dark forces more easily.