Another way is through the reactions of other characters. If other characters seem to favor Percy more, it can fuel Annabeth's jealousy. She might see how others flock to Percy and feel left out or less important, which then intensifies her jealous feelings.
Often, it starts with small incidents. For example, Percy might get praised for a simple task that Annabeth thinks she could have done better. This builds up her jealousy gradually.
Often, it starts with small incidents. For instance, Bella might get praised in front of Lauren for something she did. This makes Lauren feel inadequate. Then, as the story progresses, more and more situations arise where Bella is in the spotlight and Lauren is left out. Like at a big event in the fanfiction, Bella is the center of attention while Lauren is just a bystander.
Communication is key. They need to sit down and talk about their feelings. For example, Percy could tell Annabeth that he's only being friendly with the new demigod who seems to like him, but his heart is with Annabeth. Annabeth could then share her insecurities. Another way is through a shared adventure. If they go on a quest together where they have to rely on each other, they'll realize that their relationship is stronger than any jealousy - inducing situation. They could also be given a task by Chiron that forces them to work together and face their jealousy head - on.
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 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.
One possible reason could be Percy's natural leadership skills. He often takes charge in dangerous situations and gets a lot of attention for it. Annabeth might be jealous because she also wants that level of recognition.
Often, in fanfiction, Annabeth may be jealous of Percy's charisma. He has a way of attracting people to him, and that can make Annabeth, who is just as heroic but perhaps more reserved, feel jealous.
Well, perhaps Rachel has some unique talents or abilities that catch Percy's attention. In the fanfiction, this might make Annabeth feel insecure about her own relationship with Percy. For example, if Rachel can communicate with the gods in a way that Annabeth can't, and Percy is impressed by it, Annabeth could get jealous.
One idea could be that a new demigod arrives at Camp Half - Blood. This new demigod is really good - looking and shows a lot of interest in Percy. Annabeth gets jealous seeing them together all the time, like during training sessions or at the campfire. Another plot could be that Annabeth has to work closely with an old acquaintance on a quest, and Percy gets jealous because he feels left out and he's not sure about this acquaintance's intentions towards Annabeth. A third plot could be that in a school setting outside the camp, Percy is getting a lot of attention from mortal girls because of his heroic looks, and Annabeth has to deal with her jealousy while also trying to keep their demigod world a secret.
Well, in many Percy - related fanfictions, if we consider Grover as Annabeth's friend, he might be jealous of Percy because Percy often gets more attention or seems to be more in the spotlight. Percy has a lot of heroic moments and is the son of Poseidon which gives him a certain status, and Grover might feel overshadowed at times.
It might create some conflict initially. Percy and Annabeth could be worried about Sally's reaction, which could lead to some misunderstandings between them. However, as the story progresses, they could work through it and Sally could end up being a strong advocate for their relationship, adding a new dynamic to the fanfiction.