Well, another option is to look on Wattpad. Sometimes fan - made stories like 'frederick meets percy' end up there. You might need to do a bit of digging through the search results, but it could be worth it.
Adventure is likely to be a theme too. Maybe they go on some sort of journey together, facing challenges along the way. For example, they could be exploring a mysterious place and relying on each other's skills to get through it. It could also involve them learning from each other. Frederick might have certain knowledge or abilities that Percy doesn't and vice versa. So, through their meetings, they grow as characters. And of course, there could be elements of loyalty in the stories, standing by each other in difficult situations.
One place to start looking for 'frederick chase meets percabeth fanfiction' could be on Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search for specific tags like 'frederick chase' and 'percabeth' to find relevant stories.
One popular 'percy meets leo fanfiction' is 'The Meeting of Heroes'. It's a story where Percy and Leo first cross paths during a quest. They initially clash due to their different personalities but then gradually learn to work together. Another one could be 'Percy and Leo's Unexpected Alliance' which focuses on how they team up against a common enemy that neither could face alone.
Another place to find 'paul meets percy' fanfiction could be Archive of Our Own (AO3). It has a large collection of fan - created works. You might need to use some filters to narrow down your search to the most relevant ones, but it's likely you'll find some interesting takes on this scenario there.
One way to find great 'percy meets estelle fanfiction' is to join relevant fan communities. For example, on Reddit, there might be sub -reddits dedicated to the fandom. People in these communities often share and recommend their favorite fanfictions. They can give you insights into which ones are well - written, have interesting plots, and capture the essence of Percy and Estelle's relationship accurately.
I also like 'Percy and Harry's Unexpected Encounter'. This fanfiction explores what would happen if Percy and Harry met during a time of crisis in both their worlds. The characters' personalities are well - written, and it's fascinating to see how they work together to overcome the challenges, despite their very different backgrounds and magical natures.
Maybe Frederick has a different view of the original work and thinks fanfiction distorts it. For example, if he is a purist who loves the original Percy story as it is, any fan - made alterations in the fanfiction might be off - putting to him.
A possible plotline could be that Frederick Chase, being Annabeth's father, is initially hesitant about Percy. But as he gets to know Percy better during a quest they all end up on together, he starts to see Percy's good qualities and gives his blessing to Percabeth.
There's also 'Percy in the World of Rias'. In this fanfic, Percy gets transported to Rias' world and has to adapt to new rules and powers. It shows how his demigod abilities interact with the supernatural elements of Rias' realm. It's a great read if you like crossovers.
I'm not sure of a specific one off the top of my head. But you can try searching on fanfiction websites like Archive of Our Own. There are often a lot of unique crossovers there.