If Percy is the captain of a group of adventurers, the other adventurers are main characters too. They could include a wizard - like character who provides magic support, a strong fighter who protects the group in physical battles, and a healer who takes care of any injuries. All of them together, with Percy as their captain, form the core of the story.
Obviously, Percy is the main character as he is the captain. But depending on the type of fanfiction, there could be other important characters. For example, if he's a sports captain, his teammates would be significant. They could have different personalities and skills that interact with Percy's leadership. If he's a ship captain, his crewmates, like the navigator or the first mate, would play important roles in the story.
Well, obviously Captain Darko is a main character. He's the central figure around which the stories revolve. There might also be his trusty first mate, someone who has been with him through thick and thin. This character could provide support and sometimes comic relief.
The main characters are Naruto and Samui. Naruto's journey to become a great ninja and his experiences in the ninja world provide a rich backdrop. Samui, with her own backstory and her role in her own village, adds another layer. Fanfictions often explore how their paths cross and the relationships and adventures that unfold as a result.
A mysterious figure from the captain's past could be a key character. Maybe this person was involved in the events that led to the promise in the first place. They could reappear and try to either help or hinder the captain in keeping the promise. Also, a young crew member who looks up to the captain could be important. Their naivete and admiration could add an interesting dynamic as they try to understand the weight of the captain's promise.
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.