One possible plotline could be that Percy's sacrifice leads to a new era of peace in the fictional world. His death might inspire the other characters to come together and fight against the common enemies more fiercely. For example, his friends could form a stronger alliance to protect the world he gave his life for.
Family members, if he has any in the fanfiction world, would be devastated. His mother, for instance, would have to deal with the loss of her son. She might become more involved in the affairs of the demigod world, trying to make sure that her son's sacrifice was not in vain. Also, his half - siblings, if any, would be affected. They could be inspired to step up and prove themselves worthy of Percy's sacrifice.
In a fanfic where everyone dies in the final battle of Percy Jackson, it could be a very dark and tragic take. Maybe it's a way for the author to explore the ultimate cost of war and conflict. It could also be a statement about the futility of the fight against the gods' will. However, it would be extremely sad for fans who love the characters and hope for a more positive outcome.
Well, it could start with the final battle being so intense that the enemy has some sort of unbeatable advantage. Maybe a powerful new monster or a dark magic that the heroes can't counter. This leads to the deaths of all the main characters one by one. For example, Percy might go down first while trying to protect his friends, and then the others follow as they are overwhelmed.
He could also become withdrawn and depressed. Percy and Annabeth have a very strong bond, and her death would leave a huge void in his life. He might isolate himself from his friends and family, lost in his grief and memories of her.
Rebuilding is also a theme. After Percy's death, the world around the characters might be in chaos. So, in many fanfictions, they have to work towards rebuilding what was lost, whether it's a physical place or the sense of hope that Percy once brought.
Percy might become more independent. Without his mom's presence, he has to rely more on himself. He could start to take on more leadership roles within the demigod community. He also may develop a darker side to his personality, as the pain of his mom's death lingers. However, through his experiences and the support of his friends, he gradually learns to balance this new, harsher side with his original kind - hearted nature.
Maybe it's because Percy represents a certain kind of hero. He has his own flaws and insecurities, which makes him more relatable. People like to read fanfiction about him to see how he overcomes challenges in different scenarios. The fanfiction can also introduce new and exciting characters and plots that are centered around Percy, adding more depth to his story.
The reason could be that the Percy fanfiction often explores different aspects of the character that fans cherish deeply. It might be his heroism, his relationships, or his personal growth. Fans are protective as they view these fanfictions as a precious addition to the overall Percy fandom. They want to safeguard the integrity of these stories so that new fans can also enjoy the same great interpretations and ideas that they do.
In this fanfiction, Percy might sacrifice himself in a grand battle. He could be facing a powerful enemy that was about to strike Zoe. Percy, being the heroic type, jumps in front of Zoe at the last moment. His last thoughts could be of his friends and all the adventures he had. Zoe, in turn, is left with a deep sense of guilt and sorrow, vowing to carry on Percy's legacy. She might become even more determined to fight for the cause they both believed in, all while mourning the loss of her dear friend.