Percy Jackson is the central figure here. He's the one with the unique heritage as the son of Chaos. Artemis is a key character too. In addition, there might be some new characters created specifically for the fanfiction. For example, a mentor figure who helps Percy understand his chaotic powers better and how to relate to Artemis and her ways. There could also be antagonists, maybe a demigod who is jealous of Percy's special connection and tries to undermine him.
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.
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.
Another great addition could be Circe. She has a lot of knowledge about magic and the supernatural. In the fanfiction, she could be an ally or an enemy. If she's an ally, she could teach Percy and Artemis some spells to combat the chaos - influenced threats. If she's an enemy, she could be working with the forces of chaos to try and gain more power.
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.
Obviously, Percy Jackson himself is a main character. He's the focus as the adopted son of Chaos. Chaos would also be a major character, as Percy's adoptive father. There might be appearances from old friends like Annabeth. She could be worried about Percy in his new situation or even try to help him. Another character could be some of the primordial deities related to Chaos. They might be either allies or antagonists to Percy depending on the story.
Obviously, Percy is a main character. Since he is the son of Chaos in this fanfiction, his character development and journey are central to the story.
Well, obviously Percy himself. Since he is the son of Chaos and Nyx in this fanfiction, he is the central figure. Annabeth is often included too. Her relationship with Percy, whether it's evolving or being tested due to his new status, is a key aspect. There could also be other demigods like Grover. He might be there to support Percy or be a bit wary of his new powers.
Well, in some fanfictions, there could be a plot where Percy, as the son of Chaos and with his link to Artemis, discovers a hidden prophecy. This prophecy might state that only he can unite the forces of chaos and the order of Artemis's hunters to save the world from a new threat that neither side could face alone. So he embarks on a journey to convince both groups to work together, facing a lot of resistance along the way.
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.
It could be the Titans or some new creatures that are jealous of Percy's connection to Chaos. They might see Percy as a threat and try to stop him and Perlia from achieving their goals.