Well, in this fanfic, perhaps there are unique interpretations of the Curse of Achilles. It could be that Percy discovers new aspects of the curse that weren't in the original story. For example, it might have some sort of connection to his demigod powers in a way that makes him even more special. Also, the fanfic might explore how Percy deals with the knowledge that he has this powerful and potentially dangerous curse.
In this fanfic, Percy's character could develop in several ways. Firstly, his understanding of power and responsibility might deepen. With the Curse of Achilles, he has a significant advantage, but also a great burden. He may become more cautious in his actions as he doesn't want to misuse the power of the curse. Also, his relationships with other characters may change. Some might be in awe of him, while others may be jealous, which could lead to him becoming more discerning about who he trusts.
There could also be antagonists. For instance, some old enemies of Percy might be drawn to him because of the Curse of Achilles. They might see it as a challenge or an opportunity to finally defeat him, and these antagonists would be important characters in driving the story forward.
Perhaps there's a plotline where Percy has to keep the curse a secret from his friends. This could lead to some tense moments of near - discovery and the resulting drama as he tries to keep his friends in the dark while still relying on them in battles.
It could be an old enemy of the gods who sees Percy as a threat because of the Curse of Achilles. Maybe a Titan who escaped from Tartarus and wants to use Percy's power for their own gain. If they can control Percy, they could have a powerful weapon against the gods.
A great plot could involve Percy having to deal with the psychological impact of the Curse. He might start to feel overconfident and make mistakes. Then, his friends have to help him realize that the Curse is both a strength and a potential downfall. For example, he could be lured into a trap by an enemy who plays on his new - found sense of invulnerability.
Well, it's quite an interesting scenario. If Percy gets the Achilles curse while reading fanfiction, he might be so distracted by the story he's reading that he doesn't immediately notice the full implications of the curse. Maybe he'd initially think it was just some strange side - effect from whatever fictional world he was immersed in through the fanfiction.
In 'Percy son of Achilles fanfic', the theme of legacy is quite prominent. Percy has to carry the legacy of Achilles, which can be both a burden and a source of strength. Another theme is friendship. His friendships with other characters might be tested or strengthened because of his new identity. And there's also the theme of discovery. Percy discovers new things about himself, his powers, and his place in the world because of being the son of Achilles.
Yes, there are many non - inappropriate fanfics about Percy Jackson, including those involving Nico from 'Titan's Curse'. You can find them on fanfic platforms like Archive of Our Own. Just search for the relevant tags and filter out the inappropriate ones.