One possibility could be that the sister has a special power like Percy. Maybe she can control water in a different way, like being able to turn it into ice instantly. She could join Percy on his quests and use her power to help them out of tough situations.
Perhaps she's a sister who was thought to be dead but actually survived. She could have been corrupted by the experiences she had while being 'dead'. When she returns, she blames Percy for not saving her properly. This false blame leads her to betray Percy. She could start spreading rumors about Percy being a coward or a bad leader among the demigod community.
A common theme is the discovery of the sister's powers. For example, she might find out she can control water like Percy but in a different way. This adds an interesting twist to the story as they learn to use their powers together.
I really like 'A Sister's Tale in the Percy Jackson Universe'. In this fanfiction, the sister character brings a new dynamic to the story. It shows how she copes with the knowledge of the Greek gods and her relationship with Percy, which is full of both love and typical sibling spats. It's a very engaging read.
One great 'Percy Jackson and Sister' fanfiction is 'The Lost Sister'. It has an interesting plot where the sister has unique powers and they go on adventures together. The character development is really well - done.
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.
Definitely. Fanfiction is all about exploring new ideas and concepts. The idea of Percy Jackson, a demigod from the Rick Riordan universe, having the Sharingan, a dojutsu from the Naruto universe, is an interesting one. Writers might be intrigued by the possibilities of how Percy would use the Sharingan's abilities in his adventures. It could add a whole new dimension to his character, like being able to predict his enemies' moves more accurately or seeing through illusions in the mythological world he inhabits.
Yes, there likely is. The Percy Jackson series has a large and creative fan base. Fans often like to cross over different fictional universes, and combining Percy Jackson with the Super Saiyan concept from Dragon Ball Z is a cool and imaginative idea that some fans would surely explore in fanfiction.
Yes, there might be. Fanfiction is a vast world where all kinds of crossovers and creative ideas are explored. You can start by looking on popular fanfiction websites like Archive of Our Own or FanFiction.net. Just search for the specific concept and see if any authors have written about it.