percy is dumbledore's grandson fanfiction

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.

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.

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.

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.

One common plot twist is that Dumbledore knew all along about Harry being his grandson but kept it a secret to protect him. Another could be that there's a dark family secret that comes to light, like a curse on the family line that Harry has to break.

In most fanfictions, evidence might be fabricated within the unique plot of that story. It could be things like Dumbledore having a secret family connection that was hidden all along, or some magical bond that reveals Harry's relation to him. But in the original 'Harry Potter' series, there is no such indication.

One interesting fanfiction could be about Percy Jackson's adventures that are more closely tied to his relation as Zeus's grandson. Maybe he discovers some hidden powers that are passed down only through the Zeus lineage. He could face challenges where his Zeus - related powers are both a blessing and a curse, like when he has to control excessive lightning powers during a battle with a powerful monster.

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.

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.

It could be a very dark and complex story. Percy might be constantly at war with himself, having grown up in a more 'good' family environment but having this dark connection to Voldemort. He could be hunted by both sides - those who fear he'll turn out like his 'grandfather' and the remnants of Voldemort's followers who might want to use him for their own ends.