One potential new character could be a half - human, half - Titan who was hidden on Olympus. This character could have a complex backstory, being both feared and pitied by the gods. They could initially be an enemy to Percy, believing that Percy is just a puppet of the Olympians. But as the story progresses, they could become an ally, realizing that Percy has his own ideas and is not just blindly following the gods. Also, there could be a celestial being from a different realm who visits Olympus during Percy's time there and gets involved in his adventures.
A possible new character could be an oracle - like figure who is not from the traditional Delphi but is a seer on Olympus. This character could give Percy cryptic prophecies that are related to the future of Olympus and the demigod world. There might also be a group of centaurs who are specifically trained to protect Percy and serve as his advisors, different from the ones at Camp Half - Blood.
Perhaps in this fanfic, Percy is raised as a sort of prince on Olympus. He could be given tasks by the gods to prove his worthiness to be among them. This might include going on quests that are not just for the safety of the mortal world, but also for the stability of Olympus itself. He would also have to navigate the complex social hierarchies among the various gods and goddesses.
A new demigod from a really rare godly parentage, like a child of Hypnos, the god of sleep. This character could have unique powers related to dreams and illusions and could be an ally or an adversary to Percy. Another could be a centaur who has been exiled from his herd for some reason and has a vendetta against the Olympians. He could be a source of knowledge for Percy about some of the more hidden secrets of the gods.
Obviously, Percy Jackson is the central character. But often, Annabeth Chase also plays an important role. She might come to visit Percy on Olympus and get involved in his adventures there. Also, the gods themselves, like Poseidon (Percy's father), Zeus, and Athena, are frequently main characters as they interact with Percy in the Olympian setting.
Percy Jackson himself is likely one of the most important. He's the hero of the Percy Jackson series, and in this fanfic related to the Bane of Olympus, he would probably be at the center of the action, using his powers and wits to combat the threat.
In some 'Percy Jackson Raised on Olympus' fanfictions, there could be a plotline about Percy uncovering long - hidden secrets of Olympus. For example, he might discover a forgotten prophecy that has implications for the entire pantheon. Also, his interactions with the nymphs and other mythical creatures in the Olympian realm can make for an exciting story. Maybe he has to protect them from a new threat that is emerging within the boundaries of Olympus itself.
Obviously, Percy would be one of the main characters. And probably the Olympian gods like Zeus, Poseidon, Athena etc. would also play important roles as he is raised in their domain.
There could be a local guide in the place where Percy is exiled. This character could be an outcast from their own community and help Percy navigate the strange new land.
Well, it depends on what you like. If you're a big fan of the Percy Jackson series, it might be interesting as it often takes the beloved characters and the world of Olympus in new and creative directions. Some fanfics in this vein are really well - written and add depth to the existing lore.
Obviously, Percy Jackson himself. Annabeth could also be there, as she is smart and would be interested in Percy's new - found fluency in Greek. Grover might tag along, adding his own unique perspective. And of course, Chiron, who has a deep knowledge of Greek culture and language, could play an important role.
There could be a new oracle who is specifically attuned to Percy's 'son of fate' situation. This oracle might be a young demigod with unique powers that help Percy understand his fate better. Maybe they can see visions of the future that are directly related to Percy's journey.