The two central characters are Percy and Apollo. Percy, with his water - based powers and heroic nature, is being trained by Apollo. Apollo, with his vast array of abilities and godly knowledge, is the trainer. There could be other characters from the Percy Jackson universe popping up, such as Chiron, who might offer some advice or guidance regarding Percy's new training regime.
Well, obviously Percy Jackson and Apollo are the main characters. Percy, the demigod son of Poseidon, with his skills in combat and his ability to control water. And Apollo, the god of the sun, music, and prophecy. Their different natures and powers often create interesting dynamics in fanfiction.
Well, perhaps Percy is being trained in some sort of combat or special skills by Apollo. Maybe Apollo is teaching him archery, which is Apollo's specialty. Percy could be learning to use a bow and arrow in new and creative ways to defeat his enemies.
Obviously, Percy and Fenrir are the main characters. Percy is likely the one being trained, and Fenrir is the trainer.
Obviously, Percy Jackson is one of the main characters as he is the trainer. And then there's the young character who is being trained. This could be an original character created by the fanfiction writer. For example, it could be a young demigod who has just discovered their powers and Percy takes them under his wing.
Apollo himself is often a great character in these fanfictions. His complex personality as a god who has fallen from grace and is trying to regain his status makes for an interesting read. He brings his godly powers and knowledge of the mythological world.
The main characters would be Percy and Atalanta. Percy is probably the protagonist who is undergoing training. Atalanta, on the other hand, is the one with the knowledge and skills to train Percy. There may be other supporting characters as well, but without reading the fanfic, it's hard to say for sure.
The main characters are obviously Percy and Madara. Percy is the one being trained, and Madara is the trainer.
Apollo himself could be seen as an antagonist in a way, because of his possessive behavior towards Percy. His actions that restrict Percy's freedom and independence are antagonist - like. However, in some cases, other characters who oppose Apollo's possessiveness might also be antagonists from Apollo's perspective. For example, if Percy has a close friend who tries to protect him from Apollo, Apollo might view that friend as an enemy.
There are also times when a character who is an outcast within the Apollo cabin is the main character in fanfiction. Maybe they don't seem to fit in because their powers are different from the others, or they have a different view on how the cabin should be run. Their journey to find their place within the cabin and among the other demigods can make for an interesting story.
It could be the Titans who escaped from Tartarus and are seeking revenge. They might see Percy and Apollo's relationship as a threat to their plans of overthrowing the Olympians. Another possibility is some jealous gods or goddesses who don't like the idea of Percy and Apollo being mates.