Luke might also make an appearance in some fanfictions, even though he's dead in the original series. His past grievances against the Olympians could be a driving force for Percy's new opposition, or he could be a ghostly advisor to Percy, guiding him in his fight.
Grover could be there too. He might be the one who first discovers Percy is being bullied and tries to cheer him up or find a way to stop it. And of course, there could be the bullies, who might be mortal kids at first, but later could be revealed to have some sort of connection to the mythological world, like being descendants of minor monsters or something.
Obviously, Percy and Calypso are the main characters. Percy, with his heroic deeds and complex past, and Calypso, the lonely figure on her island. Sometimes, other characters from the Percy Jackson universe like Annabeth might also be involved, perhaps she tries to convince Percy to come back but fails as he has made up his mind to be with Calypso.
Chiron, the centaur who trains demigods at Camp Half - Blood, could also play a role. He might offer advice to Percy before he embarks on his journey with Poseidon or be there to welcome him back and help him adjust to life at camp again after his time with his father. His wisdom and experience can be a great addition to the story, especially in terms of Percy's growth as a demigod.
The gods themselves, like Zeus, Poseidon, and Athena are also main characters. Their different personalities and powers play a big role in the fanfiction. For example, Zeus's authoritative nature might create conflicts, while Poseidon's relationship with Percy as his father adds an extra layer of complexity.
The main characters are usually Percy Jackson himself, as he is the central figure in the series. Annabeth Chase is also often involved, given her close relationship with Percy. Grover Underwood is another character that commonly shows up in these fanfictions, as he is Percy's best friend.
Annabeth is often one of the main characters in these girl talk scenarios. She's smart and has a lot of experiences to share. Another one is Piper. She has her own charm and insights, especially when it comes to matters of the heart. And of course, Hazel, with her unique background and powers, can also be part of these girl - talk sessions.
A really cool storyline might be Percy losing his memory and being manipulated by an anti - Olympian force. As he regains his memories, he has to decide whether to continue fighting against the Olympians or rejoin their side. This would create a lot of internal conflict for Percy.
In 'Percy Against Olympians' fanfiction, there are multiple common themes. The idea of a hero's journey but in a more subversive way is one. Percy is already a hero, but when he's against the Olympians, it's a different kind of journey. Family is another theme. His relationship with his godly parent and how that affects his stance against the Olympians can be a major part of the story. Additionally, the concept of a changing world order is often present. Percy's actions against the Olympians could potentially change the entire power structure in the world of the series, and this is an exciting theme that many fanfiction writers explore.
In Gohan snaps fanfiction, Gohan is the main focus. However, antagonists can play a big role too. Characters like Cell or Frieza could be in the story, if it's set in an alternate universe or a what - if scenario. For example, if Frieza comes back and attacks his family again, that could be the reason for Gohan to snap. And then there are his friends who will support him, like Krillin and Tien.
Batman is obviously one of the main characters. He's the central figure around which the tickling scenarios revolve. Robin is also commonly involved, as his relationship with Batman allows for different types of interactions, including tickle - related ones. The Joker is another character that might show up, as he loves to play mind games with Batman and tickling could be part of his devious plans.