Well, it could make his breathing underwater effortless. He can explore the underwater world more freely without worrying about running out of air. It might also give him an advantage in battles underwater, as he can stay submerged for as long as he needs.
Another possibility is that it was a side - effect of a powerful curse or blessing. For example, if Percy was cursed to be more connected to the water, the gills could be a physical manifestation of that. Or if he received a great blessing from the ocean itself, the gills could be part of that package, making him more in tune with the underwater realm.
One idea could be Percy discovers he has a new ability related to his gills that allows him to communicate with underwater creatures in a more profound way. Maybe he can understand their ancient languages and has to use this new skill to solve an underwater mystery that threatens both the sea world and the surface world.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. AO3 has a wide range of Percy Jackson fanfics, and you can use the search function to specifically look for ones related to 'gills'. FanFiction.net also has a large collection, but the quality can vary more. Another option is to check out Percy Jackson - related forums where fans might recommend their favorite 'gills' fanfics.
Maybe it's a strange genetic experiment gone wrong. Some evil scientist in the fanfic world might have tampered with Naruto's DNA, adding some sort of aquatic - like genes that resulted in gills.
Well, Percy Jackson has changed fanfic in several ways. For one, it has introduced a whole new set of characters and a rich mythology that fanfic writers can play with. The complex relationships between the characters in the Percy Jackson series, like Percy and Annabeth's relationship, give fanfic writers a lot of material to explore different scenarios. Also, the unique world of demigods and the various quests they go on inspire fanfic writers to create their own adventures within that universe.
Well, it really depends on your taste. If you're a fan of both Percy Jackson and the concept of Sharingan from Naruto, it could be quite interesting. It might offer a fresh take on the Percy Jackson universe with the added element of the Sharingan's powers. However, fanfics can vary greatly in quality. Some might be well - written with engaging plots and good character development, while others could be a bit of a mess. So, it's hard to say for sure without actually reading it.
You can expect a lot of unique twists. For instance, Percy might use the Sharingan to see through the illusions that some Greek monsters create. It could also change his relationships with other characters. Maybe his friends would be both amazed and a bit wary of his new power. And the fanfic could introduce new villains or challenges that are related to the Sharingan's presence in the Percy Jackson world.
I'm fairly certain there is. Fanfiction writers often like to cross - over different fictional universes, and Percy Jackson and Excalibur are both rich sources of inspiration. Writers could explore how Percy, with his demigod abilities, might interact with the power and mystery of Excalibur. There could be all kinds of plotlines, from Percy finding Excalibur on a quest to it being a key element in a battle against a new, powerful enemy.
Yes, it is quite popular. Many fans enjoy exploring different relationship dynamics for Percy Jackson in fanfiction, and the 'harem' concept, where he has multiple romantic interests, offers a lot of creative possibilities for writers to play with different character interactions and storylines.