One reason is the allure of combining different character traits. Percy's heroism and Hermes' trickery can create a very dynamic and interesting relationship in fanfiction. Also, it might be a way for fans to fill in the gaps in the original stories. If they feel there could be more to the relationship between these two characters, fanfiction allows them to explore that.
People write Percy and Hestia love fanfiction because it offers a fresh take on the Percy Jackson universe. It allows them to explore a relationship that is not part of the original canon. It gives a chance to create unique storylines and character developments for both Percy and Hestia.
One reason could be that fanfiction offers a fresh take on familiar stories. They might be bored with the original narratives and find the creativity in fanfiction exciting.
Well, in some fanfictions, Hermes might be possessive of Percy because Percy could possess certain qualities or powers that Hermes wants to control or have an influence over. Maybe Percy has a unique connection to the world of the gods that Hermes sees as valuable.
Some people write it because they might not like Percy's character arc in the original books. They feel that he gets too much praise or that his development isn't as good as it could be.
People write 'Percy and Piper kiss fanfiction' because they like to explore different relationship dynamics. It's a way to play with the existing characters and create new storylines that might not be in the original works.
Some people write it because they see a potential in the relationship between Percy and Nico that wasn't fully explored in the original works. They want to expand on their connection and show a different side of their bond through the idea of a kiss.
People write 'Percy Jackson tortured fanfiction' to explore darker themes. They want to see how the characters would react under extreme pressure. Percy is a strong character in the original series, and by torturing him in fanfiction, writers can show his limits and how he might overcome or succumb to different forms of torture.
Some writers might be inspired by the strong bond that Ash and Pikachu already have in the original Pokemon series. They see that bond and think, 'What if there was more to it?' So they write love fanfiction to expand on that relationship. It can also be a form of escapism for the writers, creating a world where Ash and Pikachu's love can be a central theme.
Some people write it because they simply don't like Molly and Percy. Maybe they think the characters are annoying or they don't fit into their idea of what the story should be like.
People write it because they love the relationship between Annabeth and Percy. Their connection in the original series is so strong that fans want to explore more romantic moments between them, like their kisses.