Maybe Percy tries to break the curse. He could embark on a quest to find a powerful magical artifact or a long - forgotten spell that has the power to reverse his immortality. Along the way, he would face various challenges and meet interesting characters who either help or hinder his journey.
Percy would probably develop a greater sense of patience. Since he has all the time in the world, he could learn to wait for the right moment to act. This new - found patience could help him in his adventures and in his attempts to either break the curse or come to terms with his immortality. He might also study various things over the long years, becoming more knowledgeable and wise, which would also shape his character.
In such a fanfiction, Naruto might experience extreme loneliness. He would watch his friends and loved ones die while he remains alive. He could also be hunted or studied because of his immortality, constantly on the run from those who want to use his unique condition for their own gains.
His character could develop in a very complex way. At first, he'd probably be confused and scared about the curse. But as time passes, he might use his immortality for good in a more extreme way. For example, he could take on the most dangerous missions without fear of death. However, the constant cycle of seeing people he loves die would also harden him. He might become more calculating and less impulsive, as he realizes the long - term consequences of his actions. He could also gain a deeper understanding of life and death, and maybe try to find a way to break the curse not just for himself, but for others who might be suffering from similar fates.
The gods themselves could be the main antagonists. Since they cursed Percy, they might be trying to keep him in a state of misery or use him for their own purposes.
One possible plot could be Percy struggling to control new, strange powers that come with the curse. Maybe he has to constantly battle against the dark impulses the curse brings out in him.
Well, one interesting aspect could be the unique twists on the original mythology. For example, in some cursed fanfiction, the gods might have different and darker personalities. It can also be interesting to see how the characters' fates are changed in a more cursed or negative way compared to the original stories.
You can also try searching on Tumblr. There are a lot of Percy Jackson fans on there who create and share fanfiction. By using relevant tags such as 'Percy Jackson cursed fanfiction' or something similar, you might be able to find some interesting pieces. Just be aware that the quality can vary widely, so you might have to do a bit of sifting through to find the really good ones.
The main antagonist could be one of the major gods who cursed Percy. For example, Zeus might be angry with Percy for some reason and decide to curse him. Zeus would then use his power to send all kinds of obstacles and enemies Percy's way. He could manipulate the weather to create storms that target Percy or send powerful monsters after him.
It depends on the specific Perlia fanfiction. Some might focus on Percy's immortality deeply, showing how it affects his adventures in new and different ways. For example, they could write about how he feels when he watches his mortal friends age while he remains the same. Others may just mention it in passing as part of the established character trait.