Who are the main characters in Percy and Naiads fanfiction?

It's possible. There could be other demigods or mythical creatures. Maybe a centaur who gives Percy some advice regarding the naiads. Or a sea monster that they have to face together.

I'm not sure specifically as I haven't read this particular fanfiction. But it might involve Percy having some sort of adventure or encounter with the naiads. Maybe they go on a quest together or there's some mystery in the underwater world that they have to solve.

One idea could be Percy helping a Naiad protect her water source from pollution. He uses his demigod powers to fight off the forces causing the pollution.

I'm not sure specifically since I don't know the exact fanfiction, but it could be his friends who might be either involved in his hacking activities or completely unaware of them. Maybe there's a mentor - like figure who guides him in the world of hacking.

In many 'Percy is a biker' fanfictions, Percy is the central figure. However, new characters could be introduced. For example, there could be a rival biker who turns out to be a demigod from another camp. This would create a lot of tension and interesting plotlines as Percy has to deal with both his biker rivalries and his demigod duties.

Percy is the main focus. There could be other demigods that are either intrigued or threatened by Percy's difference. Some might want to be his allies, while others might see him as a threat to the status quo at Camp Half - Blood. And his family, like his mother, would also play an important role in dealing with the changes in Percy.

In most 'Percy is wise' fanfictions, Percy is central. His character development towards being wise is the focus. Other characters often include Grover, his satyr friend. Grover might rely on Percy's wisdom more than ever. Then there are the minor characters like the various nymphs and demigods who interact with Percy and are affected by his wise decisions.

There could be other gods as well. For instance, Zeus might play a role, perhaps being suspicious of Percy's newfound godly powers or seeing him as a threat to his own authority. Hermes could also be there, acting as a messenger or a guide to Percy in the world of the gods.

Percy is the central figure in 'percy is immortal fanfiction'. Other characters like Grover might play important roles too. Grover could be worried about Percy's immortality and try to help him come to terms with it. And of course, there could be new characters introduced who are also immortal and interact with Percy in different ways.

Percy is usually a central figure, and his backstory and powers play a big role in the fanfiction. Peter may be a new character introduced into Percy's world or vice versa. Their interactions are what drive the story forward. Whether they are friends or start off as rivals, their relationship is at the heart of the fanfiction, and their individual traits are what make the story unique.