How would Percy's character develop in a 'Percy Jackson meets past self fanfic'?

Well, Percy could warn his past self about future dangers. Maybe he'd tell himself to be more careful with certain enemies like Luke. It would change the course of his past adventures in an interesting way.

He would likely be more cautious and distrustful. Since he's being raised by a monster, he may not have the same sense of heroism and justice that the normal Percy has. He might see the world as a more dangerous place where only the strong survive.

Percy would likely become more withdrawn at first. The trauma of being the sole survivor would take a toll on his usually outgoing and confident personality. He might start to question his own abilities and whether he could have done more to save his friends.

They might start with some mutual suspicion. Percy would be cautious around Thor as he's a very powerful being from a different mythology. Thor might see Percy as a bit of an oddity at first. But then they could start to exchange stories about their adventures. Percy could tell Thor about his battles with the Titans, and Thor could share his tales of fighting giants. This would lead to a newfound respect between them.

His character would become more confident in his artistic abilities. Apollo is the god of many arts, so Percy would likely be exposed to music, poetry, and painting. He might be more flamboyant in his actions and speech, as Apollo has a certain charm. For example, he could start using more flowery language when talking to his friends or enemies.

Percy's character would likely become more in tune with nature. He'd be more reserved perhaps, as he grows up in an all - female group. His sense of honor might be more shaped by Artemis' values, such as protecting the weak and the natural world.

He would probably become more somber. The loss of all his friends would make him less carefree. His sense of humor might still be there, but it would be tinged with sadness.

Percy's character would develop in many ways. Firstly, he'd gain a deeper understanding of the politics among the gods. This would make him more calculating and strategic. He'd also become more empathetic towards the gods' viewpoints, even if he doesn't always agree. His relationships with his old friends would change too. He might not be able to be as carefree with them as he used to be. Instead, he'd have to consider how his actions as king affect them and the entire demigod community. Moreover, his sense of responsibility would expand far beyond just protecting his friends and family to safeguarding the entire divine and mortal worlds.

Percy would likely become more diplomatic. As Hera's husband, he'd have to deal with all kinds of divine politics, so he'd learn to be more tactful in his words and actions.

Percy might become more confident in his abilities. Knowing he is related to Achilles, a great hero, could give him a boost. He may also become more strategic in combat, learning from Achilles' military tactics.