The main character is Percy Jackson for sure. However, depending on the creativity of the fanfiction writer, there could be a whole host of other characters. We might see some ancient beings from the very origins of chaos. There could be other demigods from different cabins at Camp Half - Blood that we haven't seen much of in the original series but play important roles here. And don't forget about the villains. There could be new antagonists who are trying to either take advantage of the chaos or stop Percy from fulfilling his role as the champion of chaos. Annabeth would most likely be there to provide her intelligence and strategic thinking to Percy's more impulsive nature.
I'm not sure specifically as there can be many different fanfictions with this title. But generally, it might involve Percy Jackson in some new adventures related to chaos. Maybe he has to face new threats or make alliances in a world where chaos is a major factor.
Since it's about Percy Jackson being the champion of the Pit, he's the main focus. However, in the Percy Jackson universe, his relationships are important. So Annabeth could be a major character, perhaps helping Percy strategize or solve problems in the Pit. Grover, with his knowledge of nature and the wild, might also be involved, using his skills to assist Percy. Additionally, there could be antagonists like some powerful monsters or maybe a rival champion vying for the same position or goal as Percy within the Pit.
The Titans could be potential enemies. Even though they've been defeated before, some of them might be resentful and see Percy as the Chaos Champion as a new threat to their possible plans of a comeback. Kronos, for example, might have some of his essence lingering and try to possess other powerful beings to go against Percy.
Obviously, Percy Jackson is the main character. He is the one who becomes the soldier of chaos. His character development from a hero of the Olympians to a figure in the chaos realm would be a central focus.
Percy Jackson is definitely a main character. He's the one at the center of the 'son of chaos' concept. Then there are his friends from Camp Half - Blood like Annabeth. She might be involved in trying to understand Percy's new situation or helping him in his new adventures. Grover could also be there, being Percy's loyal friend as always.
In the 'percy jackson saved by chaos fanfiction', Percy Jackson and Chaos are central. Percy, the demigod with his green eyes and black hair, is the focus of the rescue. Chaos, on the other hand, is this mysterious and powerful being. But it's not just them. There could be other characters that play important roles. Grover, Percy's satyr friend, might be there, worried sick about Percy. And then there could be new characters created by the fanfiction author. Maybe a prophet who foresaw Percy's encounter with Chaos and tried to guide him before the danger even occurred. Or an ancient being that has a connection to Chaos and is either helping or hindering Percy's rescue.
Another main character could be Chiron. He has always been an important figure in Percy's life. In this fanfiction, he might be the one who first discovers Percy's connection to Chaos and tries to guide him. Or he could be struggling to understand how to deal with Percy's new situation, especially if Percy's powers start to have unforeseen effects on Camp Half - Blood.
Obviously, Percy Jackson himself is a main character. Since he is the one blessed by chaos. He's the hero of the original series and in the fanfiction, his character is likely to be further developed with this new element of chaos.
Well, Annabeth would definitely be one. She's always been by Percy's side, and in this fanfiction, she might be a bit worried about Percy being the champion of Nyx. She could be trying to help him while also being cautious of Nyx's motives.
Obviously, Percy Jackson is one of the main characters as he is the son and heir of chaos in this fanfiction. His friends from the original series like Annabeth Chase could also be main characters. They would likely play important roles in supporting Percy on his new journey and dealing with the implications of his new status.