Percy would probably be extremely hurt. He trusts Annabeth deeply, so this betrayal would shatter that trust. He might feel angry at first, wanting to confront both Annabeth and Luke.
Well, it could be that in the fanfiction, the writer might have developed Annabeth's character in a way where she becomes disillusioned with Percy. Maybe she sees Luke as having something that Percy lacks, like a different kind of power or charm. Or perhaps there are some misunderstandings between Percy and Annabeth that Luke takes advantage of, pushing Annabeth towards the betrayal.
The concept of 'Camp Betrays Percy' fanfics can also stem from a desire to create new storylines. The original Percy Jackson series has a set plot, but fanfic writers like to take things in new directions. By having the camp betray Percy, they can introduce new characters, motives, and plot twists. It also allows for a deeper exploration of Percy's character, his emotions when betrayed, and how he overcomes this difficult situation.
Percy would be extremely hurt. Sally is his mother, and her betrayal would shatter his world. He might initially go into denial, not wanting to believe that she could do such a thing.
At first, it could be quite rocky if they find out later in the story. Percy might be angry that Luke has been keeping secrets or has done bad things in the past. But eventually, they would likely grow closer as they realize they are family and start to support each other.
One popular 'Camp Betrays Percy' fanfic might be 'The Betrayal at Camp Half - Blood'. It shows Percy being wrongly accused and the camp turning against him. Another could be 'Percy's Ordeal: Camp's Betrayal' which details Percy's struggle when his so - called friends at camp side with his enemies.
One popular 'Poseidon betrays Percy' fanfiction might involve Poseidon being forced to betray Percy due to some ancient godly law or threat from another powerful deity. In such stories, Percy often has to face the heartbreak of his father's betrayal while also trying to figure out a way to resolve the situation and still prove his worth.
One possibility is that it could lead to Percy's downfall. If Annabeth, who has been his close ally and friend, betrays him, it might shatter his trust not only in her but also in others. He could become more isolated and vulnerable, making it easier for his enemies to target him.
In this fanfiction, perhaps Percy is influenced by some dark force. This force convinces him that the Olympians are corrupt and need to be overthrown. He then betrays them by stealing important artifacts from Olympus that are crucial for its protection. He might also try to turn the demigods against the Olympians.