Gaea should be included. Since she is an important primordial entity in the Percy Jackson universe, her presence could drive the plot. Maybe she has some unfinished business from the past that involves the primordial gods and Percy gets caught in the middle. Tartarus could also be a great character. It's a place but could be personified in the fanfiction, and Percy could have to face its terrifying power and find a way to survive or even use it to his advantage.
Erebus, the personification of darkness, would be a great addition. His shadowy nature and connection to the primordial world could create some really cool scenes. And then there's Oceanus, the primordial god of the ocean. Given Percy's connection to the sea, their interactions could be very intense and full of conflict. Percy might have to prove himself to Oceanus or face his wrath, which could be a major plot point in the fanfiction.
Definitely Chaos. As the origin of all things, it would add a whole new level of mystery and power to the story. Also, Nyx, the goddess of the night, could be really interesting. Her dark and powerful nature would contrast well with Percy's more heroic and light - hearted side.
Well, obviously Percy and Phoebe are the main ones. But other great characters to include could be Annabeth. She could be jealous of Phoebe at first, creating some interesting drama. Grover would also be a good addition. His ability to sense danger and his friendship with Percy could play an important role in the story.
Well, obviously her father Percy Jackson should be included. His experience and wisdom could be a great help to his daughter. Annabeth Chase could also be a great addition. She could be like a mentor to the daughter, teaching her things about strategy and knowledge.
Sally Jackson, Percy's mother, is also an important character. Her love for Percy and her strength can be a central part of the story. She could be the one who gives Percy the emotional support he needs when he's confused or scared about the strange things happening around him. In a fanfiction, she could also have some secrets of her own related to the mythological world that Percy discovers as he grows up.
Percy himself is obviously a must - include. His journey of leveling up is the core of the story. Annabeth is also great as she can be a support and also have her own leveling - up arc related to her wisdom and battle strategies. Grover could be there too, as he often provides comic relief but can also level up his own nature - related powers.
Leo Valdez would also be an excellent character to include. His mechanical skills and sense of humor could lighten the mood during tense situations. He could also create some cool gadgets to help the group in their adventures, like a device to detect mythical energy or something similar.
Paul Blofis should be in it. Since he's Sally's husband, his presence would add an interesting layer to the family dynamic in the fanfic. He could be involved in some humorous situations when it comes to understanding Percy's demigod world.
Well, Percy Jackson himself is likely to be one of the main characters. He would probably be involved in the story as it relates to the primordial of creation, maybe trying to understand or stop it. Another could be Annabeth, as she often teams up with Percy. And of course, the primordial of creation would be a central character, with its own motives and powers.
Well, Percy Jackson himself is likely to be one of the main characters. He would probably be involved in the story given the 'Percy Jackson' part of the title. He might be facing new challenges related to the Primordial of Earth.
Percy Jackson is likely to still be one of the main characters. Since it's related to his world, he'd be in the center of the story. Alongside him, there could be new characters representing the forgotten primordial beings. They might be ancient and powerful, with names and abilities that are unique to this fanfiction realm.
It's likely that Percy Jackson himself is still a main character. Since it's related to the Percy Jackson world, he would probably play a significant role.