Since Harry has dealt with complex magical artifacts like the Marauder's Map, he could help Rias in her search for powerful items in the Highschool DxD world. His expertise in this area could lead to Rias obtaining artifacts that significantly enhance her development. For example, she might find an item that allows her to communicate with her allies more effectively or one that gives her better control over her devil powers. Harry's magic would not only add new skills to Rias but also open up new avenues for her growth and exploration.
His story would be drastically different. He might not have the same fear of Voldemort as he would be in a different environment. Instead, he could be facing threats related to Rias' world like other devil clans or powerful supernatural beings.
In such a fanfiction, Harry Potter might grow up with a very different set of values. Rias is from a different fictional universe with her own code of conduct. He could be trained in devil - related magic or combat skills that are unique to her world. Maybe he would be more assertive in relationships as Rias is quite bold in that aspect.
He might react with hostility. Dark Naruto has a certain edge to him, and if he sees Rias as a threat or someone he doesn't like, he'll likely oppose her. He could use his combat skills to challenge her directly.
Well, it's a really wild concept. In theory, it could be possible. Maybe Harry Potter, with his magic skills from his own world, could find himself in the Highschool DxD universe and for some reason decides to take Rias under his wing. He could teach her some unique magic tricks that are different from the devil magic in her world. But it would be really challenging to blend the two very different universes' magic systems and storylines in a believable way.
Potential plot points might include Harry helping Rias with her studies at school. Since he's well - versed in magic from his own schooling, he could offer her new ways to approach magic studies in her devil school. Also, there could be a plot where they have to face a common enemy together. Maybe an evil wizard from Harry's world has found a way into the Highschool DxD world and they have to combine their powers to stop him. And perhaps Harry could share with Rias the story of the Deathly Hallows and she could find a parallel in her world's artifacts.
Well, it could be a really interesting story. Maybe Harry Potter, with his magical knowledge and skills from the wizarding world, could introduce new forms of magic to the Highschool DxD universe. He might help Rias develop her powers in unique ways. For example, he could teach her some advanced spell - casting techniques that are not known in the DxD world. This could give Rias an edge in battles and also in her leadership role within the school's supernatural community.
Her character development would be quite significant. As she is pregnant, she would have to deal with new emotions like fear for the baby's safety and excitement for motherhood. This would probably make her more cautious in her actions. For example, she might be less likely to engage in dangerous battles without considering the potential harm to the baby. She could also grow closer to other female characters who could offer her advice on pregnancy and motherhood, which would further shape her character.
One great fanfiction idea could be that Issei discovers a new power within himself that is directly linked to Rias's heritage. Maybe he can tap into an ancient magic that only works in harmony with Rias's own powers. As they train together to master this new ability, their relationship deepens beyond just the typical master - servant bond in the Highschool DxD world.
A common theme is power - up. Rias may gain new powers or improve her existing ones. This could be related to her devil heritage or through some special training or encounter.
In 'Highschool DxD' fanfiction about Rias, her character often retains her strong - willed and noble nature. She is a powerful devil, and in fanfictions, her leadership skills and loyalty to her friends are usually emphasized.