Artemis is a must - as the goddess leading the Hunt. Her hunters, especially those like Phoebe, could be main characters. Phoebe could be curious about Percy and his blindness. She might be the one to first approach Percy when he's found. Another character could be Chiron. He could hear about Percy being with the Hunt and come to check on him. He could offer advice to both Percy and the Hunt, based on his vast knowledge of demigods. And then there's the Oracle. It could give some cryptic prophecy related to Percy's new situation with the Hunt, which would add an interesting layer to the story.
Obviously, Artemis. She is in charge of the Hunt, and her relationship with Percy would be central to the story. Then there could be Zoe Nightshade. She was a very important member of the Hunt in the original Percy Jackson lore. If Percy is adopted by the Hunt, she would have a big influence on him, either as a mentor or as someone who initially opposes his presence. And the wolf is also crucial. It could be a mysterious figure, maybe a messenger of the Hunt or a guardian of some sort, and it would be involved in Percy's journey every step of the way.
One possible plot could be that Percy, being blind, has a unique connection to the Hunt. Maybe he can sense their presence in a different way. For example, he can feel the magic of the Hunt through vibrations in the ground or changes in the air. The Hunt could be initially suspicious of him but then realize his special abilities are actually an asset. They could take him under their wing and he could help them in their quests in ways no one else could, like using his blindness to his advantage in stealth missions.
Artemis could be a major character. As the goddess associated with the Hunt, she would have a huge role. She might initially be skeptical of Percy's ability to protect the Hunt but gradually come to trust him. Thalia, who is part of the Hunt, would also be important. She has her own history with Percy and could be a key ally in the protection efforts.
There could be his friends or comrades in the hunt. For instance, someone like Annabeth who might be affected by his leaving and try to convince him to stay.
Definitely the dragons would be key characters. There could be a powerful dragon queen who takes Percy under her wing, so to speak. She would be a very important figure in Percy's upbringing, teaching him the values and ways of the dragons. And there might be an outcast dragon, shunned by the others, but who bonds with Percy because they both feel like outsiders. Also, some of Percy's original friends from the demigod world, like Annabeth, might make an appearance. She could be initially confused and then intrigued by Percy's new dragon - influenced self.
Well, obviously Percy Jackson is one of the main characters. Since it's about him being a slave of the Hunt, he's at the center of the story. Then there would likely be the Hunt's leader. This character would play a crucial role in dictating Percy's actions and his life within the Hunt.
Artemis could be seen as the 'guardian of the hunt' in Percy Jackson fanfiction. As the goddess of the hunt in Greek mythology, she has the power and the authority to oversee everything related to the hunt. She could be the ultimate protector of the hunters and the hunting grounds.
Piper McLean could be a great addition. Since she has some connection to Aphrodite already. She could either help Aphrodite in her plans or try to protect Percy from her. And of course, we could add some minor gods or goddesses like Eros. He could be Aphrodite's little helper in creating chaos with love arrows, which would definitely fit in with the lemon aspect of the fanfiction if it involves some love - related mischief.
A powerful Titan who was once associated with the Hunt but turned against it. This Titan could be seeking revenge for being exiled from the Hunt in the past and wants to destroy it completely.
A possible main antagonist could be a rogue demigod who was once rejected by the Hunt and now wants revenge. This demigod could have allied with some powerful monsters and is constantly causing trouble for the Hunt. For example, they might be stealing important artifacts or sabotaging the Hunt's missions.