One underrated character is Tyson. He has so much potential for a fanfiction focus. He's a Cyclops, which makes him different from the other demigods, and his loyalty to Percy is really heartwarming. A fanfiction could explore his backstory more, like his life before he met Percy at Camp Half - Blood. Another underrated character is Clarisse. She's often seen as just a bully, but there could be a lot more to her. A fanfiction could show her softer side and what made her the way she is, perhaps a story about her first quest and how it changed her.
Luke Castellan is an interesting underrated character in a sense. While he is a major antagonist in the main story, in fanfiction, we could explore his journey before he turned against the gods. What led him to his disillusionment? A fanfiction could show his early days at Camp Half - Blood, his friendships, and what made him start to question the gods' ways. It could also be a redemption arc story for him, where he has a chance to make things right in a different way than in the original story.
Silena Beauregard is quite an underrated character. In fanfiction, she could be the main focus, especially exploring her relationship with Beckendorf and her role in the camp. Maybe a story about her trying to balance her love life with her duties as a camper. Also, the Oracle could be a great character to focus on. Fanfiction could be about the Oracle's origin and how it came to be at Camp Half - Blood. What secrets does it hold? And how does it choose who to give prophecies to? It would be really interesting to dig deeper into these aspects.
I think Grover is a bit underrated in fanfiction. He's Percy's best friend and his role as a satyr could be expanded upon. For example, fanfiction could focus on his search for the lost god Pan. His abilities like being able to sense nature spirits could be used in more creative ways. Also, Clarisse La Rue. She's often just seen as a bully in the original, but in fanfiction, she could be developed into a more complex character. Maybe explore her relationship with her father, Ares, more and her own journey of self - discovery as a demigod. And then there's Rachel Elizabeth Dare. She has the gift of prophecy and that could be the center of an interesting fanfiction story, showing how she copes with this power and her role in the demigod world.
One underrated character is Bob, the Titan. He has a really interesting backstory and his loyalty to Percy and his friends is quite remarkable. Fanfiction could explore his past in more detail, like his time before he became Bob. Another character is Small Bob, the cat. He may seem like a minor character, but there could be a really fun fanfic written about his adventures in the House of Hades, perhaps with his own little quests. Nico di Angelo is also a bit underrated in this context. There could be fanfiction focusing on his internal struggles while in the House of Hades, like his feelings of isolation and how he copes with the darkness of the place.
There's also Grover. He's Percy's best friend, but in a lot of fanfiction, he's just there as a sidekick. He could be developed more, like showing his growth as a satyr and his role in protecting nature. And then there's Clarisse. She's a tough and strong demigod, but often overlooked. Fanfiction could explore her in - depth feelings and her own quests that are separate from Percy's.
I'm a big fan of Percy in fanfictions. He's always so brave and resourceful. In many fanfictions, he gets to show even more of his humorous side, which makes him really likable.
Obviously, Percy Jackson himself. He's the main character of the original series, so having him interact with the SI character can create many exciting storylines.
Silena Beauregard is also underrated. She could be the focus in a fanfiction set in the school. Since she was a daughter of Aphrodite, she could use her charm and beauty skills in a different context at school. For example, she could use her powers to boost the confidence of shy students or mediate between feuding groups by using her charm to calm everyone down.
The main characters are Percy Jackson, the son of Poseidon; Annabeth Chase, daughter of Athena; and Grover Underwood, a satyr.
In 'Percy Jackson and the Lightning Thief Novel', Percy Jackson is obviously a central character as he is the protagonist. He is a demigod with the power of Poseidon. Annabeth Chase is another important one. She is the daughter of Athena and is very intelligent and brave. Grover Underwood, a satyr, is Percy's friend and protector. He helps Percy throughout his journey. Luke Castellan is also a key character. He has his own secrets and motives which are gradually revealed as the story progresses.
One great Percy Jackson Lightning Thief fanfiction is 'The Lost Quest'. It continues the adventures of Percy and his friends in a really engaging way, with new monsters and challenges that fit well with the original story's tone.
Nico di Angelo is often overlooked compared to Percy. He has such a rich backstory with his connection to the Underworld and his struggle with his identity. Fanfiction could explore more of his inner thoughts and his relationships, especially his friendship with Percy on a deeper level.