Jason's jealousy could lead to a change in the story's direction. He might start a rivalry with Jackson, which could add drama and tension to the plot. Maybe he tries to prove himself better than Jackson, causing a series of events that wouldn't have happened otherwise. Also, his jealousy could make other characters take sides, further complicating the plot.
It can create conflict. For example, Jason might try to undermine Jackson's actions or relationships in the story.
Jason might show his jealousy by being overly critical of Percy. He could nitpick at Percy's actions or decisions during quests. For example, if Percy takes a risk during a battle, Jason might comment on how irresponsible it was, while secretly he's just jealous of Percy's courage to take risks.
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 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 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.
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.
Jason might be jealous of Percy's connection to the sea. Since Percy is a son of Poseidon, he has this unique and powerful bond with the ocean. In fanfic, this could make Jason, who might not have such a strong elemental connection, feel inadequate. So, his jealousy could be a big part of the story as he tries to find his own place and power.
It might create some division. Some fans who like fanfiction might feel opposed to Jason Grace. While others who respect his view might be more cautious about fanfiction.
Well, it might be that Percy has a more carefree attitude in some ways. He doesn't always follow the rules strictly and still manages to come out on top. Jason, who is more of a rule - follower and leader type, might envy Percy's ability to bend the rules and get away with it. Plus, Percy has a closer connection to Camp Half - Blood which has been his home for a long time, while Jason has to adjust to this new place and community, seeing Percy so well - integrated can make him jealous.
The jealousy in fanfiction can both strengthen and strain their relationship. On one hand, it shows that they value each other enough to be possessive. For example, if Inuyasha gets jealous when another man flirts with Kagome, it might make Kagome feel special. But on the other hand, too much jealousy can lead to fights. If Kagome is constantly jealous of Inuyasha's past with Kikyo, it can create a rift between them.
It can create tension. Sasuke's jealousy may lead him to push Sakura away at first. He might be afraid to show his true feelings, so he acts distant. But this only makes Sakura more confused and a bit hurt. Eventually, if they communicate, it can strengthen their bond as they realize the depth of their feelings for each other.