One possible reason for Annabeth to betray Percy in fanfiction could be a misunderstanding. Maybe she was misled by false information about Percy's actions or intentions. For example, if someone spread rumors that Percy was secretly working against the demigods, Annabeth might believe it without getting the full story.
In some fanfictions, Annabeth might betray Percy for power. Maybe she gets lured by some dark force offering her great power and in order to get it, she has to turn on Percy. It could also be due to a misunderstanding. For example, she might be tricked into believing Percy has done something really bad and as a result, she betrays him without realizing the truth.
In fanfiction, their relationship is often portrayed as very strong and loving. Writers like to show how they support each other through tough times. For example, in some stories, when Percy is feeling down about his powers, Annabeth is there to cheer him up and remind him of his importance.
Another idea is a fanfiction set in a modern city where Percy and Annabeth have to blend in as normal teenagers but still deal with the occasional monster attack. It could focus on how they navigate their relationship while also trying to keep their demigod identities a secret from their new friends at school. This would add an interesting layer of drama and secrecy to their story.
At first, Percy would likely be angry. He's a fighter, and being betrayed by someone he loves would fuel his rage. He might go after Annabeth to demand an explanation. But as the reality sinks in, he could become very sad and withdrawn. He might isolate himself from his other friends as well, feeling like he can't trust anyone anymore. He would constantly be thinking about what he did wrong to make Annabeth turn on him.
A popular one is 'Percy and Annabeth's New Quest'. In this fanfiction, the author takes the duo on a quest that wasn't in the original books. They have to solve ancient riddles and battle new mythical creatures. It stays true to the characters' personalities, making it a great read.
Percy would likely feel a great sense of hurt and confusion. He might question his own judgment in trusting Annabeth. He could become more withdrawn and less trusting of others in general.
One great 'Percy Jackson and Annabeth Fanfiction' is 'The New Quest'. It takes the characters on a new adventure outside of the original story's setting. The author does a wonderful job of maintaining the personalities of Percy and Annabeth that we all love from the books.
One great 'Annabeth and Percy Jackson fanfiction' is 'The Lost Heroine'. It has an interesting plot where Annabeth goes on a solo quest and Percy has to find her. The character development in it is really well - done.