Another plotline could involve Percy exploring the powers he has inherited from Chaos and Nyx. Maybe he discovers unique abilities that no one has ever seen before, like the power to manipulate shadows in a way that's different from a child of Hades. This could lead to him going on a journey to understand the full extent of his powers and how to control them.
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.
Developing his powers further is also a way. Since he's the son of Nyx, he could learn to manipulate different aspects of darkness like creating illusions using shadows or traveling through the dark realms faster. This would not only make him more powerful but also show his growth as a character as he masters these new abilities.
In some fanfictions, Percy Jackson is indeed portrayed as the true son of Chaos. Writers often take creative liberties to explore new storylines and character developments. This idea can lead to very interesting and unique plot twists, such as Percy having powers beyond what we see in the original series.
The plot could center around Percy's transformation into the 'Son of Chaos'. He might have to face challenges that test his loyalty to his old friends at Camp Half - Blood while also adapting to his new role. He may also encounter new characters who are either allies or enemies in this new phase of his life. It might also involve a power struggle within the chaotic realm where he has to prove himself worthy.
One possibility for a Percy Jackson fanfiction centered around the Primordial Son of Chaos could be a story where Percy discovers a hidden prophecy related to this powerful being. Maybe he has to team up with some unlikely allies, like a group of minor gods who are also interested in the balance that the Primordial Son of Chaos might disrupt or uphold. This could lead to a series of adventures across different realms, including Tartarus, where they search for clues about the true nature of the Primordial Son of Chaos.
One common theme is the struggle with identity. Since Percy is the son of Erebus and Nyx in these fanfictions, he often has to grapple with being different from the 'canon' Percy. Another theme is power. Given his new parentage, he might have different or enhanced powers, and the fanfictions often explore how he uses or controls them.
The Titans could be antagonists. Since Nyx is an ancient and powerful goddess, the Titans might see Percy as a threat because of his connection to her. They could try to either turn him against Nyx or simply eliminate him.
One idea could be Percy having to face a new type of monster that is related to Nyx's powers. For example, a shadow - creature that can only be defeated by using the unique abilities he inherits from being the son of Nyx.
In my opinion, it has its merits. It takes the familiar Percy Jackson world and turns it on its head. If you're a fan of the series and like to see alternate versions of the story, this fanfiction could be really interesting. It could delve deeper into the concept of Chaos and how that affects Percy's life. For example, his relationships with other characters might be completely different, and the way he views the world of gods and monsters could change too.