In the fanfic, Jason's jealousy could lead to his downfall at first. He could make bad decisions due to his envy, like ignoring his own team members to compete with Percy. But then, through a series of events, such as facing a powerful enemy together with Percy, he realizes the importance of unity. He starts to work on his jealousy and becomes a more well - rounded character. Percy could also develop by becoming more aware of how his actions might affect others. He might be more careful not to show off his skills too much around Jason, which shows his maturity.
At first, it might show the tension between them due to Jason's jealousy. Jason could be distant or snippy with Percy. But as the story progresses, they might start to communicate. Maybe Percy notices Jason's jealousy and tries to reach out, which begins to thaw the ice between them.
The fanfiction might develop it through relationships. Say, Jason becomes closer to a group of characters that Percy wants to be part of. Percy then feels left out and his jealousy towards Jason intensifies. There could also be public events where Jason is praised and Percy is not, which is a common way to build up this jealousy plot.
The author can show Jason's jealousy through his actions. For instance, when Percy is praised for a successful mission, Jason might clench his fists or look away with a scowl. He could also be short - tempered with Percy in group discussions, interrupting him or making snide remarks.
One reason could be Percy's popularity. Percy has many friends and is well - liked in the demigod community. Jason might feel overshadowed by Percy's charisma and the attention he gets.
In fanfiction, it could be related to their popularity among other characters. Percy might be more liked or have more friends, making Jason jealous. It could also be about their achievements. Percy may have accomplished more heroic deeds that overshadow Jason's, leading to his jealousy.
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.
One possible plot could be that in the fanfic, Jason is jealous of Percy's natural leadership skills. Percy always seems to know what to do in a crisis, and the other demigods look up to him. Jason, on the other hand, feels like he has to constantly prove himself. So, he starts trying to outdo Percy in every mission, which leads to some tense and exciting situations. For example, they might both be trying to solve a mystery at Camp Half - Blood, and Jason's jealousy causes him to take unnecessary risks just to show he's better than Percy.
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.
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.
In some fanfictions, Jason might be jealous of Percy because Percy has a closer connection to certain characters. For example, if Percy has a special bond with Annabeth that Jason wishes he could have. Maybe Percy is more well - known among the demigods, and Jason, coming from a different camp, feels left out or envious of Percy's status.