One interesting plotline could be Percy using his powers to save his school from a mythical threat that somehow infiltrates the campus. For example, a group of minor demons might be causing chaos in the school, and Percy has to use his water - controlling abilities to stop them without revealing his identity to most of the students.
Some fanfictions might also include new characters specific to the school setting. For example, a mortal friend of Percy's who has always suspected that there was something different about him. When Percy's identity is revealed, this friend could play a crucial role in either helping Percy adjust to the new situation at school or causing some trouble by accidentally spreading the news too widely.
Some fanfictions might focus on different pairings. Like Percy with someone other than Annabeth in an alternate universe kind of scenario. It could also delve into the powers of the characters more, perhaps showing Percy developing a new aspect of his water - related abilities that was only hinted at in the official stories.
Percy and Annabeth are still really popular in fanfiction. Their relationship is a big draw for fans. People like to read about their further adventures together or how they deal with new challenges as a couple.
In some fanfictions, there are often crossovers. For example, a demigod from the Percy Jackson world meeting a character from another popular fantasy series. This can lead to really cool and unexpected adventures. They might have to combine their different skills and knowledge to overcome a common enemy. The contrast between the two different fictional universes can create a lot of interesting plot twists.
Percy Jackson himself is often very popular. Fans love to write more about his adventures, his relationships with other characters, and his growth as a demigod. He's the main character of the original series, so it's natural that he remains a central figure in fanfictions.
There might be fanfictions that focus on the relationships between different gods. Like a story about the friendship (or rivalry) between Poseidon and Hades. It could explore their past, their different views on ruling their realms, and how Percy and other demigods get caught in the middle of their power struggles.
In 'demigods revealed percy jackson fanfiction', Percy Jackson is bound to be a central figure. But other demigods like Nico di Angelo might also take on major roles. Since it's about demigods being revealed, characters who have secrets or hidden aspects to their identities, such as Thalia Grace, could be important. Also, the gods might play a more prominent role as they are related to the demigods, so Zeus or Poseidon could be significant characters in the story.
Percy Jackson is obviously a main character. He's usually at the center of most fanfictions. Annabeth Chase is also very common, as their relationship is a big part of the original series. Grover Underwood often makes an appearance too, since he's Percy's best friend. Nico di Angelo is another popular character in these fanfictions, especially when it comes to exploring the darker side of the demigod world.
These fanfictions often explore different aspects of the Percy Jackson world that the original books might not have fully delved into. For example, the political implications among the demigods or the reactions of minor characters when they learn about Percy. It gives more depth to the universe. Also, the way Percy himself copes with the revelation can be written in various creative ways, which makes it engaging.