The jealousy could also be a source of miscommunication. Hermione might misinterpret Annabeth's actions as showing off or being condescending. This would lead to arguments and misunderstandings. As the story progresses, these misunderstandings could either be resolved and lead to a stronger friendship, or they could spiral out of control and cause a major breakdown in the relationship between the two characters and their respective allies.
Hermione's jealousy might drive her to improve herself in areas she sees Annabeth excelling in. So she could start learning more about combat or architecture - related magic. This would change the direction of the story as she embarks on new quests for knowledge. Also, it could lead to a character arc where she has to overcome her jealousy to work with Annabeth for a greater good, like saving their combined worlds from a common threat.
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.
It can add drama. Tonks might start acting out of character, being more cold or distant towards Hermione or even Remus. This can create tension in the relationships. For example, she might try to sabotage their friendship by spreading rumors or trying to keep them apart.
The jealousy in this fanfiction scenario can have a complex impact on their friendship. Hermione's pride in her academic achievements is a big part of her character. When Harry gets good grades, she might feel like she's losing her 'edge'. This could make her distance herself from Harry. But as the story progresses, they'll realize that they each have their own strengths and weaknesses. Harry's success in grades doesn't diminish Hermione's intelligence, and they'll learn to support each other again, strengthening their friendship in the long run.
Often, she becomes overly possessive. If she sees Percy talking to another girl, she'll quickly insert herself into the conversation. She might put her arm around Percy or give the other girl a look that clearly says 'he's mine'. This possessiveness is a clear sign of her jealousy in the Percy Jackson fanfiction world.
The jealousy might cause Percy to view Luke's actions more critically. Even if Luke has good intentions, Percy's jealousy could make him suspect Luke of ulterior motives. This could gradually erode any positive feelings Percy had for Luke before. On the other hand, Luke might start to feel the coldness from Percy and become confused or even resentful. Their relationship could devolve into a cycle of suspicion and animosity, with the jealousy acting as a catalyst for all these negative emotions and behaviors.
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.
It can initially create some tension. Naruto might act out in small ways, like being a bit short - tempered around Hinata. This could make Hinata confused and a bit hurt. But as the story progresses, it can also lead to more honest communication. Naruto realizes his jealousy is a sign of his deeper feelings for Hinata, and he finally confesses. This can strengthen their relationship as they start to understand each other better.
Jealousy can create misunderstandings. For example, if Naruto gets jealous, he might jump to conclusions about Hinata's actions and say something hurtful without meaning to. This could make Hinata feel sad and pull away from him, straining their relationship.
It can create conflict. For example, Jason might try to undermine Jackson's actions or relationships in the story.