The jealousy can create conflict. Jason might start to act out, causing rifts between himself and Percy or Thalia. This can lead to different story arcs, like a rivalry developing. For instance, he could try to undermine Percy's actions or try to get closer to Thalia in a way that seems forced, which drives the plot forward as other characters react to his behavior.
In the fanfic, it could be that Percy and Thalia have a certain level of trust and understanding that Jason lacks with either of them. For example, they might communicate in a way that Jason wishes he could with them. Percy's relationship with the gods, especially Poseidon, and Thalia's connection to Zeus might make them a more formidable and enviable pair in Jason's eyes. He may be jealous of the power dynamics and the way they interact within the story.
Jason's jealousy might initially make him act out in negative ways. He could be bitter towards Percy and Thalia, which would isolate him from them and others. But as the story progresses, he might realize that his jealousy is unfounded and start to change for the better, learning to be more confident in himself.
The jealousy could lead to a split in the group. If Jason is constantly jealous, he may distance himself from Percy and Thalia, which would change the group dynamics. This could then lead to new alliances and rivalries within the fanfiction. Maybe Jason teams up with other characters who also feel left out because of Percy and Thalia's popularity.
It can add a lot of drama to the story. For example, Jason's jealousy might lead to him making rash decisions. He could try to compete with Percy and Thalia in a way that causes problems for their group. This might create conflicts that they have to resolve, making the story more interesting.
Annabeth might be annoyed. She's very perceptive, so she quickly realizes Jason's jealousy. She'll probably tell him directly to stop acting childish and respect her relationship with Percy.
Well, it could be that in the fanfiction, Percy and Thalia are both really popular and well - liked among their peers. Jason, on the other hand, might feel overshadowed by them. He's jealous because they seem to get all the attention and admiration, while he feels like he has to struggle more to be noticed.
Jason might show his jealousy through subtle actions like avoiding Percy during group activities or making snide remarks about Percy's powers when others are around.
The jealousy can initially strain their relationship. Percy's jealousy might make Annabeth feel smothered or like he doesn't trust her. For example, if Percy is jealous of Annabeth's friendship with a male demigod, he might act coldly towards her, causing her to be confused and a bit hurt.
In Percy Jackson fanfics, Jason's jealousy can add a lot of drama. Maybe he's jealous of Percy's popularity among the demigods. For example, Percy has a lot of friends and is often seen as a hero. Jason might feel overshadowed, which could lead to some interesting conflicts in the fanfic storylines.
It can create conflict. For example, Jason might try to undermine Jackson's actions or relationships in the story.