Well, it could be a story where Percy Jackson's demigod skills are combined with Nancy's detective abilities. Maybe they team up to solve a mystery that involves both the mythological world and the normal human world. For example, a series of strange disappearances that are actually the work of a minor Greek god who has found a way to operate in the modern world unnoticed.
The fanfic might also focus on a relationship between Percy and Nancy. Percy could introduce Nancy to his world of Camp Half - Blood, and she in turn could show him how to use modern detective techniques in their adventures. They might face challenges from other demigods who are skeptical of Nancy's presence, but eventually prove that she is a valuable asset.
A good Percy Jackson x Nancy fanfic would first have a well - developed plot. It should blend the elements of Percy's world of gods and monsters with Nancy's detective - solving skills in a seamless way. For instance, if there is a conflict, it should not seem forced but rather a natural consequence of their two worlds colliding.
One great fanfiction could be one where Nancy Bobofit has a character arc that makes her more than just a bully. Maybe she discovers some secrets about the demigod world and has to team up with Percy Jackson. It could show her growth from being a nuisance to a helpful ally.
One challenge could be dealing with the child's past traumas. If the child has been through a lot, like being orphaned or facing monster attacks on their own, Percy would have to help them heal. He's not a trained psychologist, so it would be difficult for him to know exactly how to handle it.
Perhaps he has been exposed to some sort of deadly and unknown substance in the mythical world. This could be a new type of monster venom or a strange plant that he accidentally ingested. The substance could be attacking his body from the inside, causing his internal organs to bleed, and thus he throws up blood.
Another popular theme is friendship. Despite their initial animosity, fanfictions like to explore the possibility of Percy and Nancy becoming friends. This could involve them going through adventures together, learning about each other's strengths and weaknesses, and ultimately developing a bond.
Another reason might be that she is forced to leave. There could be a magical or divine force at play. Maybe a god or goddess, who has some grudge against Percy or his father Poseidon, manipulates the situation so that Sally has no choice but to abandon Percy. This would add a lot of drama and conflict to the fanfic.
Perhaps in the fanfic, Percy is a weapon in the sense that he is the key to activating a super - powerful ancient weapon. The gods and goddesses are all vying for control over him because they know that with Percy, they can wield this ultimate weapon. Percy has to navigate through political intrigue among the deities while also trying to figure out his own role in this whole mess.
The plot could be that Percy discovers an old sweatshirt in his attic that turns out to be a magical artifact from one of the gods. Maybe it gives him the power to control water in a new and unique way, and he has to figure out how to use it without getting into trouble with the other gods.
Well, the color of his eyes could be a big part. His sea - green eyes are unique, and in a fanfic, it could be that when he gets really angry or emotional, the color intensifies. For example, when he's facing a powerful enemy and his friends are in danger, his eyes might turn into a stormy green.
It could be about Percy going on a quest in ancient Egypt and encountering Hatshepsut. Maybe she has some knowledge or power that he needs to complete his mission.