One common plot is Percy being framed by his friends for a crime he didn't commit. This often leads to him being hunted by other demigods or facing exile. Another is his friends siding with his enemies for power or personal gain, leaving Percy alone to fight against the odds.
In the world of fanfiction, Percy could go on a self - discovery journey. He could travel to different places that hold significance in his past or his family's history. Along the way, he might encounter other beings or forces that offer him new powers or insights. This would help him grow stronger both physically and mentally, and he would be able to face his former friends with new - found confidence, whether to forgive them or to make them pay for their betrayal.
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.
At the same time, Percy could be determined to find out why they betrayed him. He wouldn't just accept it passively. He'd be on a mission to uncover the truth, whether it was some outside influence or a misunderstanding that led to their actions. And he might also be a bit vengeful, thinking about getting back at them in some way, though his good nature might prevent him from going too far.
The story could go like this. Percy's friends are influenced by a false rumor about him. They start to avoid him and eventually turn on him. Percy, who has always been loyal to them, is devastated. He has to figure out how to clear his name while also dealing with the pain of their betrayal. Along the way, he might meet new allies who help him through this difficult time and show him that not all people are like his former friends.
The sister could be under the control of a powerful god or goddess who has a grudge against Percy. She might be forced to betray him. For instance, she could lead Percy into a trap set by the god. She could lie to him about a mission, saying it's a rescue mission but in fact it's a trap where the god is waiting to take revenge on Percy for some past deeds. This would be a really heart - breaking betrayal for Percy as he trusts his sister.
I really like 'Percy Jackson and the Realm of Shadows'. In this fanfic, the author takes the gang on a journey through a mysterious realm filled with all kinds of mythical creatures that we haven't seen much in the original series. It's full of action and adventure.
First, you need to know the characters well. Read the original books multiple times to understand Percy, Annabeth, and their friends' personalities, quirks, and backstories. For example, Percy is brave but also has a sarcastic side.
There's a chance that it could be a character from Percy's family. For example, a distant relative who has been corrupted by some dark magic. They might betray Percy for their own gain or because they are being controlled, and this betrayal could lead to Percy being killed.
Apollo might be the betrayed god. He could have been tricked by another god into betraying Percy. For example, Apollo might have been promised more power or a higher status among the gods if he turned against Percy. But then he realizes too late that he's been used and that he's actually betrayed someone who could have been an ally.