In this fanfic, the story could start with Rias Gremory sensing a unique power within Harry Potter. She decides to adopt him in a way that she can mentor and guide him. Harry, being a curious boy, would be both intrigued and a bit scared at first. As the story progresses, they might face common enemies that require the combined knowledge of the wizarding world magic and devil powers. Harry could grow not only in power but also in his understanding of different magical realms.
Well, perhaps the plot could involve Rias Gremory taking Harry Potter under her wing in a world where the two fictional universes collide. She might use her devil powers to protect Harry from the threats in the wizarding world that Dumbledore couldn't handle. Harry could also learn some new skills from the devilish side of things, like enhanced combat abilities.
The main characters are Rias Gremory, who has her own set of powers and a leadership role in her devilish world, and Harry Potter, the young wizard. Rias would play a key role in shaping Harry's new path. Additionally, we might see characters like Dumbledore from the Harry Potter universe popping up to check on Harry. And from Rias's world, her servants or allies might be involved in the story as they interact with Harry.
Perhaps in the fanfic, Narcissa adopts Harry because she has a change of heart after seeing the destruction Voldemort causes. She wants to protect Harry as a way to atone for her family's association with the Dark Lord. Harry would then grow up in a Slytherin - influenced environment but still hold onto his Gryffindor values. This would lead to interesting interactions with other Slytherins and a different dynamic within Hogwarts.
In this fanfic, an interesting concept could be the power dynamics. Harry Potter has his own set of powers and skills, and Rias Gremory has her own abilities and her peerage. When they come together, there could be a whole new power structure. Maybe they form an alliance and have to figure out how to combine their powers effectively. It could also be about the exploration of different values. Harry Potter values friendship, courage, etc., while the Rias Gremory world might have different values related to loyalty within the peerage. This contrast could lead to some great character development and storylines.
Maybe there is an ancient prophecy in both worlds that foretells of a union between a wizard and a demon. Harry Potter and Rias Gremory are unknowingly the ones mentioned in the prophecy. As they are brought together, they first resist the idea as it goes against their own beliefs. However, as they face various threats, like a group of rogue wizards and demons who want to stop the prophecy from being fulfilled, they start to see the value in each other. They combine their unique magical abilities and ultimately fulfill the prophecy, bringing peace and a new era of cooperation between the two worlds.
Obviously, Harry Potter would be one of the main characters. He brings his own story, skills, and personality from the Harry Potter series. And Rias Gremory would also be a main character as she is from her own universe. Her leadership and unique abilities would play a major role. Hermione and Ron could also potentially be main characters as they are Harry's closest friends. In the Rias Gremory side, her peerage members like Akeno or Koneko might also be important characters in the fanfic.
Well, perhaps it could start with Bella Swan finding little Harry Potter in a strange situation, like he's been magically transported to her world. She decides to take him in out of kindness. Then, she might have to deal with the magical aspects of Harry's world that she doesn't understand at first. Maybe she tries to protect Harry from the threats in his own world using her own unique skills.
One idea could be that Harry Potter, while on a mysterious magical journey, stumbles upon the world where Rias Gremory exists. They initially misunderstand each other due to their different magical backgrounds. Harry is used to wands and spells, while Rias has her own demonic powers. But as they get to know each other, they start to learn from one another and combine their powers to face a common enemy that threatens both their worlds.
Well, it could be really interesting. Harry could bring his magic skills from the wizarding world of Hogwarts. Maybe he'd introduce new spells to the world Rias is in. He might also form a strong alliance with Rias and her group, using his experience in fighting dark forces like Voldemort to help them in their battles.
A plot twist could be that the magic within Harry starts to have an impact on the Cullens' immortality. It could either strengthen it in some strange way or put it at risk. Another interesting twist would be if the Cullens have to hide Harry not only from the wizarding world but also from other vampire clans who see him as a threat or a valuable asset due to his unique magical powers. And what if Harry starts to develop a new kind of magic that is a blend of wizardry and something influenced by the Cullens' vampire nature?
In a 'Percy Jackson adopts Harry Potter' fanfic, the plot could start with Percy being on some kind of mission that crosses into the wizarding world. He stumbles upon Harry, who is alone and vulnerable. Percy decides to adopt Harry because he sees the same kind of determination and courage in Harry that he has. As they journey together, they exchange knowledge. Percy teaches Harry about Greek mythology and combat skills, while Harry shares his knowledge of magic. They form a bond that helps them face threats from both magical and mythological creatures, and they might even team up to fight against a common enemy that is a threat to both their worlds.