The fanfic could focus on Percy's own character development within the context of being Amphirite's brother. He could start off as a somewhat naive or inexperienced character. Through various encounters and experiences, like facing sea monsters or dealing with the politics of the underwater world, he grows into a more confident and respected figure.
Perhaps it's a story of Percy's relationship with Amphirite. It could show how they interact, their sibling bond. It might include times when Percy has to protect Amphirite from some threat or how Amphirite helps Percy when he's in trouble. For example, Percy could get caught in a feud between different sea deities and Amphirite steps in to save him.
Well, it could be about Percy's adventures in the world related to Amphirite. Maybe he has to prove himself in a world full of sea - related challenges since Amphirite is a sea - goddess. He might be on a quest to find a lost treasure that has some connection to his sister.
One plot twist could be that Percy discovers he's not actually Amphirite's biological brother. Maybe there was some kind of mix - up or a hidden secret about his origin. This would completely change his relationship with Amphirite and his place in the sea - world.
A fanfic about Percy, brother of Zeus, could start with Percy feeling a sense of isolation. Despite being part of the divine family, he doesn't quite fit in. He decides to leave Olympus for a while and explore the mortal world. There, he experiences the joys and sorrows of humanity in a way that Zeus never has. He falls in love with a mortal, which causes a huge rift between him and Zeus. This love story could be the central theme of the fanfic, with Percy having to choose between his family and his new - found love.
It could be about a beach vacation they take together. Maybe they're on a quest that leads them to a tropical island and they end up wearing bikinis and having some fun and romantic moments on the beach.
Well, it could be about Percy's continued adventures and leadership as a praetor. Maybe it would explore how he deals with new threats to the camp while in this position, and his relationships with other campers might be further developed.
It could be about Percy going on a quest in ancient Egypt and encountering Hatshepsut. Maybe she has some knowledge or power that he needs to complete his mission.
It could be about Percy getting involved in a quest where he has to work with a blindfolded Artemis. Maybe she's been cursed to be blindfolded and Percy has to help her break the curse while facing various mythological monsters along the way.
One possible plot could be Percy's adventures in the world of the Greek gods as the brother of Artemis and Apollo. Maybe he has to use his unique skills, perhaps some sort of special powers related to his divine siblings, to solve a problem in Olympus. For example, he could be the key to resolving a conflict between two powerful godly factions.
The plot might involve Percy's discovery of a hidden power within him. As the brother of Zeus, he has always been in his brother's shadow. But when he uncovers this new power, it changes everything. He has to learn how to control it, and in the process, he may attract the envy or fear of other gods. This could lead to a power struggle within the divine realm.
One possible plot could be Percy and Artemis having to team up against a common enemy. Since Percy is a son of Poseidon and Artemis is a powerful goddess, their combined powers could be a force to be reckoned with. Maybe they have to stop an ancient evil that is threatening both the mortal world and the world of the gods. Percy's skills in combat and his ability to control water, along with Artemis' hunting skills and her connection to the moon, would make for an interesting dynamic as they fight side by side.
One possible plot could be Percy dealing with the strange combination of his own water - based powers and Aphrodite's domain of love. Maybe he has to use his skills to help Aphrodite solve a problem related to love among the demigods, like a love - related curse that is causing chaos in the demigod community. He could struggle with how his more action - oriented nature fits with Aphrodite's more emotional and relationship - focused world.