The central character is Percy. Alongside him, his family members could be involved. They might worry about him leaving the camp and their reactions could be part of the story. Additionally, there could be some antagonists who try to stop Percy from becoming famous or try to take advantage of his new - found fame for their own evil purposes.
Obviously, Percy himself is the main character. There could also be his friends from the camp who might play a role in his journey outside the camp, either helping him or trying to bring him back. Maybe some new characters that he meets on his path to fame, like a mentor figure who guides him in the new world he enters.
Well, it could be that Percy leaves camp and discovers a new power within himself while on his journey. He then uses this power in a very public way, like in a big sports event where he showcases superhuman abilities that no one has ever seen before. This could lead to him becoming famous as people are always fascinated by the extraordinary.
In this fanfiction, Percy is the main one in control. But characters like Chiron, the centaur mentor, would also play a significant role. Chiron has a wealth of knowledge and experience, and Percy would likely rely on him for advice on matters of the camp's history and traditions. Also, there could be some antagonist characters within the camp who don't like Percy's new rules and ways of controlling, which would add some conflict and drama to the story.
Obviously, Percy Jackson himself would be a main character. Since it's about him being in a god camp. Annabeth Chase is also likely to be a main character as she has always been an important part of Percy's life. Grover, Percy's best friend, would probably be there too. And there might be some new characters, like other god - like beings or powerful demigods in the camp that Percy interacts with.
Percy himself, of course. His friends like Annabeth and Grover would likely be in it too. Maybe there would be some new characters, like a powerful wizard who helps Percy on his path to fame. Or a mysterious stranger who initially opposes Percy but later becomes his ally.
He might meet other demigods who are not affiliated with the camp. These could be demigods who have been living on their own, trying to hide from the monsters and the chaos of the demigod world. They could have different views on how to use their powers and might teach Percy new ways to fight or survive.
Obviously Percy himself. Also, Annabeth would probably be there as his girlfriend. Grover, his satyr friend, might also make an appearance. And the gods, like Poseidon, Percy's father, would surely play a role, either guiding Percy or testing him on his path to godhood.
Perhaps it's an old acquaintance from Percy's past who he reconnects with after leaving camp. They fall in love and she becomes the mother of his daughter.
Most probably, the main characters would include enthusiastic trainers of different ages. There might be a budding trainer who is shy but has a very powerful Pokemon. Another could be an experienced trainer who acts as a mentor to the younger ones at the camp. And of course, there could be a mischievous trainer who always gets into trouble but has a heart of gold.
He might go on a solo adventure to discover more about his powers. He could encounter new mythical creatures that he hadn't seen around the camp. Maybe he'll meet some other demigods who are on the run or have their own secret quests.
There could be new characters introduced, like old family retainers of the noble family Harry is now part of. Maybe an old wizard who serves as an advisor to Harry on matters of the lordship. And of course, some antagonists such as rival lords or wizards who don't want Harry to gain too much power.