The main character is Percy, no doubt. However, depending on the plot of the 'percy born blind fanfic', other characters can vary. Some fanfics might include Percy's family members as main characters, exploring how they deal with Percy's blindness. There could also be antagonists who target Percy because of his perceived weakness due to blindness, making them important characters in the overall story as well.
In addition to Percy, there could be a healer or a magic - user who tries to find a way to cure his blindness. This character would be important as they drive part of the plot. And of course, Percy's closest friends, who are with him through thick and thin, would also be main characters. They share his joys and sorrows and are there to protect him when needed.
Grover can be a key character too. In some 'Percy Jackson blind fanfic', Grover uses his empathy link with Percy in a unique way to assist him. His loyalty to Percy is further emphasized in these stories.
Obviously, Percy is the main character. There could also be his family members who might react in different ways to his being born a monster. Some might be accepting, while others could be horrified.
Well, 'The World Through Percy's Blind Eyes' is an interesting 'percy born blind fanfic'. It focuses on Percy's unique perspective of the world around him. He uses his other senses to perceive things that others might miss. There's also a fanfic where Percy teams up with other characters to fight evil despite his blindness, but I can't recall the exact name at the moment.
Obviously, Percy would be the main character. As he is the one born a god in this fanfiction.
Perhaps it could be a new evil force created as a result of Percy's sudden god - born existence. His new - found power could have unbalanced some ancient magic or prophecy, and this new evil entity rises to oppose him and restore the old balance. It might be a being made of dark magic that has a vendetta against Percy for disrupting the natural order of things.
Obviously, Ash Ketchum is the main character. His Pokémon would also be very important characters. Pikachu, for instance, would likely play a crucial role in helping Ash get around and protecting him. His friends like Misty and Brock could also be main characters, as they would be there to support Ash in his new situation.
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.
The most important character is of course the man born blind. He is the central figure around whom the story revolves. His experiences, his struggles, and his growth form the core of the narrative.
Well, without actually reading the fanfic, it's hard to say for sure. But it could be his friends. In many fanfics, there are often sidekicks or best friends who play important roles. They might support Percy in his adventures or add some comic relief to the story.