A fanfiction could revolve around the idea that the Eye of Odin has been stolen by a rogue demigod who wants to use its power for his own gain. Percy Jackson is called in to stop this demigod. The Eye of Odin in this story could be a key to unlocking an ancient power that could change the balance between the Greek and Norse worlds. Percy has to learn about Norse magic and lore quickly in order to face this new threat. He might meet some Norse demigods along the way who either help or hinder his progress.
The plot could involve Percy being sent on a quest by Chiron after strange omens related to the Eye of Odin start to appear at Camp Half - Blood. Percy discovers that the Eye has the power to see into the future, but only for those who are worthy. As he searches for it, he is opposed by a group of villains who want to use it to rule the world. Percy must race against time to find the Eye first and decide what to do with its power.
At first, Percy would probably be angry and frustrated. Losing an eye is a huge deal. But he's also a determined person. He would start to practice with his remaining senses more intensively. He'd learn to listen more carefully for approaching enemies, feel the vibrations in the ground or water more acutely. He might also seek out some magical or medical help within the demigod world. There could be potions or spells that might help him either regain some vision or enhance his other senses to make up for the loss.
In a fanfiction, Percy could lose an eye while on a quest. Perhaps he's exploring an ancient, cursed temple. There are hidden traps everywhere, and as he's trying to solve a riddle to progress, one of the booby traps activates. A sharp blade swings out and hits his eye. This event could change his relationships. Some friends might be overly protective, while others might not know how to act around him. Percy would then have to prove that he's still the same hero, just with a new challenge to overcome.
Sure did. Thor's loss of an eye is a key development that adds depth to his character and story arcs in the comics. It often symbolizes his growth and sacrifices.
Well, it could be due to a powerful enemy attack during a fight in Wave. Maybe an enemy with a sharp weapon or some dangerous jutsu managed to strike Naruto's eye.
No. Percy Jackson is an original fictional series. Although it uses Greek mythology as its base, it has created a completely new world, characters, and storylines. Fanfiction usually implies building upon an existing work in a more derivative way, often by fans rather than the original creator. 'Percy Jackson' was created by Rick Riordan as an original concept.