The story would change in many ways. Firstly, the power dynamics would shift. Harry has his own set of powerful magic, which could tip the balance in battles. Secondly, the relationships within the group would be different. Harry might have a different approach to problem - solving compared to Rias's group members. So, there could be some friction at first but also a lot of growth as they learn to work together.
The story would change significantly if Harry Potter joins Rias Gremory in fanfiction. Harry's moral compass, which was shaped by his experiences at Hogwarts, would influence the group's decisions. His ability to handle dangerous magical artifacts could be crucial in Rias's world. For instance, if there were a situation similar to the Horcruxes in Rias's world, Harry would know how to deal with it. His presence would also likely bring a different tone to the story, perhaps a more heroic and self - sacrificing one, as he is known for putting himself in harm's way to protect others. This would contrast and blend with Rias's own style of leadership and decision - making.
If Harry Potter were to join Rias Gremory in fanfiction, the story's scope would expand greatly. Harry comes from a world full of mystery and unique magic. His presence would attract new enemies and allies alike. His knowledge of the Deathly Hallows, for example, could introduce a whole new aspect to the story. Also, his friendship with Ron and Hermione might be a factor. Maybe they could also get involved in some way, further complicating and enriching the story. The story would no longer be just about Rias's world but a blend of two very different magical universes.
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.
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.
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.
The story would change in multiple ways if Harry joined. Firstly, the location aspect. Harry is used to Hogwarts and the wizarding world locations. But in the Slenderman world, it's often in creepy forests or abandoned places. He would have to adapt to these new settings. Secondly, the conflict. Instead of the usual battles against Death Eaters or dark wizards, he would be facing a completely different kind of threat in Slenderman. His magic might not work in the same way as it does in his own world. He may need to find new ways to use it or combine it with the resources available in the Slenderman world. Also, the relationships in the story would be different. Harry might form new alliances with characters in the Slenderman world, or there could be conflicts between his values and the way things work in that world.
The overall plot would be completely different. Since Harry is Rias's father, he might introduce some Hogwarts - like education into the Underworld. This could lead to a new generation of devils with different skills and values. Harry's past traumas might also make him extremely protective of Rias, and this could lead to conflicts with other devil families who have different ideas about Rias's role in the Underworld.
The story would become much darker. Bellatrix is a symbol of pure evil in the Potter universe.
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.
Well, if Harry Potter joined Rias's peerage in a fanfic, it could be really interesting. He'd bring his powerful magic skills from the wizarding world. Maybe he'd teach the other members some unique spells. His Gryffindor courage would also fit well with the group's values.
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.
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.