Perhaps some of the minor gods who are tired of the traditional power structure in Olympus could be Percy's allies. They might see his rebirth as a son of Chaos as an opportunity to shake things up. Also, any being that has a connection to the concept of change or new beginnings could potentially side with Percy. This includes spirits of innovation or even some forgotten heroes who sense that Percy is the key to a new era in the world of demigods and gods.
Percy Jackson himself would obviously be a main character since it's a 'Reborn Percy Jackson Fanfiction'. His friends like Annabeth Chase are also likely to be main characters. She could play a crucial role in helping Percy adjust to his new life after being reborn. Grover would probably be there too, still being Percy's loyal friend. And the gods, especially those who have a connection to Percy like Poseidon, would also be important characters as they might have different reactions to Percy's rebirth.
A character who was a villain in their past life but is reborn with a chance to change. They would struggle with their old instincts and the expectations of others, but could grow into a hero. This kind of character arc would be really engaging as they fight against their own nature and the prejudices of the demigod community.
Well, one interesting idea could be Percy having new powers or abilities. Maybe he's reborn with the power to control not just water, but also other elements like fire or air. Another could be his relationships being different. For example, his friendship with Grover might start off on a more competitive note instead of being friendly from the start. And also, the whole concept of him being reborn might mean he has a different view of the gods, perhaps more skeptical or more understanding depending on his new experiences.
The Percy Jackson series was a series of fantasy novels written by Douglas Hofstadter, who told the story of the protagonist, Percy Jackson, and his adventures. The series included Defense Against the Dark Arts, The Magic Kingdom, Percy Jackson and the Sword of Fire, and Percy Jackson and the Curse of the Dragon.
The protagonist of the story, Percy Jackson, was a young magician who had a special ability--to communicate with dragons. In the series, Percy Jackson and his companions went on many adventures, their goal was to find lost magical treasures and fight against evil forces.
The plot of the series was full of fantasy elements and magic techniques, which was very popular among readers. At the same time, the characters in the novel also have their own characteristics, with profound character images and character descriptions, so that readers can understand and appreciate the story more deeply.
If reborn into this fanfiction, your life would be full of new challenges. You'd be part of a community of demigods, which means there would be a whole set of rules and hierarchies to follow. You might start off as a nobody but through your actions on quests, you could become a hero. You'd also be constantly in danger from monsters sent by the gods who don't like you or your parent god.
Well, in such a fanfiction, Percy might gain new and extremely powerful abilities as a son of Chaos. He could have control over primordial forces that are far beyond what he had as a son of Poseidon. For example, he might be able to manipulate the very fabric of reality in ways that would make him almost god - like.
Well, a major plot twist could be Naruto being reborn as Percy but still having some of his past life memories. This would lead to him trying to find other reincarnated ninjas in the Percy Jackson universe. Maybe he thinks there are other shinobi reborn as demigods too. Also, his knowledge of seals could be used in a really unique way. He could create seals that interact with the magic in the Percy Jackson world, like sealing away monsters in a way that the demigods have never seen before.
Well, if Harry Potter is reborn as Percy Jackson, perhaps his relationship with the gods would be unique. Since he has experience with a different kind of magic system, he might question the Greek gods' ways more. He could try to introduce some of the more organized aspects of the wizarding world, like the Ministry of Magic's rule - making, to the rather chaotic world of the demigods.