In a 'percy adopted by chaos fanfiction', it could start with Percy being disillusioned with the Olympian gods. Chaos senses this and approaches Percy. After being adopted, Percy is exposed to the vastness of Chaos's power and knowledge. He may be sent on missions to different dimensions or realms to maintain balance, as Chaos sees him as a key figure in the grand scheme of things. Along the way, he discovers secrets about his past and his true potential that were hidden from him before his adoption.
Maybe in the fanfiction, Percy is on the verge of death in a battle. Chaos, who has been observing Percy for a while, decides to save him and adopts him. Percy then embarks on a journey in Chaos's realm. He could be trained by powerful beings there and form new alliances. His relationships with his old friends from his previous life might be strained as they don't understand his new situation, but he also gains new friends who are loyal to him because of his connection to Chaos.
Well, there could be new characters created specifically for this fanfiction. For instance, Chaos might have his own loyal servants or minions who interact with Percy. There could also be other heroes or demigods from different pantheons. They might come to Percy for help or to challenge him. And of course, Percy's mother, Sally. She might be worried about her son and try to reach out to him, even though he is now in the realm of Chaos. Her presence could add an emotional aspect to the story as Percy has to balance his new life with his love for his mother.
In this fanfiction, Percy could be exposed to different realms and dimensions that are part of Chaos' domain. He might meet some very strange and powerful creatures. Maybe he'll form alliances with them or learn from them to become an even greater hero. Also, his personality could change as he adapts to this new and wild environment under Chaos' care.
One plot idea could be Percy's struggle to balance his new identity as Lady Chaos' adopted son with his existing relationships in the demigod world. He might face suspicion or envy from his old friends. Another idea is that he discovers new powers related to chaos, which he has to learn to control quickly to face an emerging threat. Maybe there's a prophecy that only he, as the son of Lady Chaos, can fulfill, leading him on a quest across different realms.
One interesting plotline could be Percy's struggle to adapt to his new role as the adopted son of Chaos. He might have to deal with new powers that are both a blessing and a curse. For example, he could have the power to manipulate the very fabric of reality, but it comes with the risk of losing his humanity. Another plotline could be Percy facing off against old enemies from his past in the Percy Jackson series, but now with his newfound powers and status. It would be a test of his loyalty and how much he has changed.
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.
It's possible that some of Percy's old enemies, like Kronos' minions who somehow survived, might resurface in this fanfiction. They could be trying to stop Percy from achieving whatever goals Chaos has for him. Also, some of the gods might get involved. They could be curious about Percy's new situation, or they might be worried that Percy's new power under Chaos could be a threat to them. And then there could be some mysterious entities from the Chaos - related realms that we haven't heard of before in the original Percy Jackson stories.
Well, one possibility is that Percy could gain new powers related to Apollo. For example, he might learn to heal more effectively or have a connection with the sun. Another aspect could be his relationship with Apollo's other children. He'd have to adjust to a new family dynamic within the godly realm.
Well, perhaps Percy has lost his original family or home in this fanfic. Ares, being the god of war, might see potential in Percy. He could adopt Percy to train him to be a great warrior. Percy might struggle with Ares' rough and war - like ways at first, but then gradually adapt and learn unique combat skills from him.
Well, in this fanfiction, perhaps Percy is adopted by Hera to serve as a bridge between the gods and the demigods. Hera might see his potential to unite both groups and decides to take him under her wing. Percy then has to navigate the complex politics of Olympus while still maintaining his relationships with his demigod friends.
Well, it could be about Percy having a new life in the realm of the gods. Maybe he gets special powers and training from them. He might also face new enemies that are threats to the gods, and he has to use his newfound abilities to protect the divine world.