Perhaps the plot could start with Percy being sent to Hogwarts for some reason, like his demigod powers are being affected by some dark magic that only the wizards can help with. While at Hogwarts, he uncovers that he is Dumbledore's grandson. This leads to a whole series of events where he has to deal with the Hogwarts politics, make friends and enemies, and also figure out how to use his demigod and new - found wizarding heritage to stop an ancient evil that is starting to rise again. He could face challenges like dealing with the Slytherin students who might be jealous of his connection to Dumbledore, and also trying to convince the demigod world that the wizarding world can be an ally.
The plot could revolve around a new threat that targets both the demigod world and the wizarding world. Percy, as Dumbledore's grandson, feels a responsibility to bring the two worlds together to fight this threat. He could start by gathering a group of his friends from both worlds, like some of his demigod friends and some Hogwarts students he befriends. They would have to learn to work together, with Percy acting as a bridge between their different powers and cultures. Along the way, Percy might also discover some long - lost secrets about his family and the two worlds' connection.
One possible plot could be Percy discovering his relation to Dumbledore. Maybe he starts having strange dreams or visions that lead him to the wizarding world. He then has to learn about his new family connection while also trying to keep his demigod identity a secret from most of the wizards, as they might not understand it.
This could be a really interesting fanfiction idea. Percy Jackson has his own rich world of Greek mythology in the 'Percy Jackson' series, and Dumbledore is from the 'Harry Potter' universe. Combining them could lead to some unique magic and adventure. Maybe Percy would inherit some of Dumbledore's wisdom and magical abilities along with his own demigod powers. It could be set in a world where the two fictional universes collide, and Percy has to use both his skills to face new threats.
Well, the plot could be centered around Percy's attempts to bridge the gap between his father Poseidon and his grandfather Zeus. There have always been tensions between the two gods. Percy, using his unique position, tries to bring peace. But there are forces at work, like some rogue demigods who don't want peace between the two powerful gods. They try to sabotage Percy's efforts, leading to a series of adventures and challenges for Percy.
Well, one possible plot could be that Percy discovers his new relation to Hephaestus later in his adventures. He might then start to have an affinity for creating and fixing magical items, which could be a new skill for him in battles against monsters. He could also meet other descendants of Hephaestus who teach him more about his heritage.
One possible plot could be Percy using his Uchiha heritage to gain new powers. For example, he might unlock the Sharingan which could enhance his battle perception in the demigod world. He could then use this newfound ability against his enemies, like the Titans or monsters. This would create a whole new dynamic in the Percy Jackson universe as he combines his demigod skills with Uchiha powers.
One possible plot could be that Percy Jackson's grandson discovers a portal that leads to the wizarding world. He soon learns about Voldemort's reign of terror and decides to use his demigod powers to stop him. Along the way, he teams up with some young wizards and witches who are also against Voldemort.
They could be related through a shared ancestor in a really convoluted backstory. Imagine there was an ancient being who had descendants in both the world of Greek mythology (where Percy Jackson is from) and the wizarding world. This being's bloodline could have led to Percy on one side and Dumbledore on the other, perhaps giving them both their unique powers and a connection that's yet to be fully discovered.
One common theme is identity. Percy has to figure out who he is now that he has this new family connection. Another is power. Since Dumbledore was so powerful, Percy might inherit some of that power or knowledge.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own. Some stories might explore Percy's newfound family connection and how it changes his relationship with the wizarding world and his friends at Hogwarts.
In the fanfiction, perhaps Voldemort's grandson is not as evil as his grandfather. He could be trying to redeem his family's name. Percy Jackson might initially be suspicious of him but then they team up. The grandson could teach Percy some basic magic, and Percy could teach him how to be brave in the face of real danger, not just the kind wizards face. They might go on an adventure together to retrieve a powerful artifact that could change the fate of both their worlds. This would be a great way to explore the idea of good and evil not being so black and white.
Percy would probably rely on his friends. In the Percy Jackson series, his friends were always there for him. In this fanfiction situation, he'd need them more than ever. They could help him stay grounded and remind him of his true self, not the dark legacy of Voldemort. Also, he might learn more about his demigod side to overpower the dark side in him.