Hestia's possessiveness can shape the plot in many ways. It might lead to Percy being isolated from other characters who could be important to his development. This in turn can create a series of events where Percy has to either break free or come to terms with Hestia's possessive nature. Also, it could attract the attention of other powerful beings who either oppose or support Hestia's possessiveness, adding more twists to the plot.
Well, it could affect the plot in various ways. The gods' possessiveness might mean that Percy has limited freedom. He may constantly be under the watchful eyes of the gods, which restricts his actions. Also, it could lead to power struggles among the gods themselves, with Percy caught in the middle. Maybe one god tries to protect Percy from the others' possessive actions, adding more twists to the story.
It can create conflict. For example, if other characters don't like Jason's possessiveness, it can lead to arguments or even fights.
Percy may become more reserved. With Artemis being possessive, he might start to hold back his normal, outgoing nature. For example, he may not be as quick to jump into new adventures or make new friends.
Percy might initially be in shock. He has always trusted Hestia, so when she betrays him, it would be a huge blow. He could become very angry and feel a sense of deep betrayal. He might lash out at those around him, or he could go into a state of self - doubt, wondering what he did wrong to make Hestia turn against him.
It could be that the author of the fanfiction wanted to create a unique dynamic. Perhaps Percy's character in this fanfic has different values and goals that conflict with Hestia's, so he hates her.
In the fanfiction, Percy's possessiveness might also be demonstrated by his need to be included in all of Annabeth's plans. He may feel left out or threatened if she starts making plans with other people without him. He wants to be a part of everything she does, almost like he owns a part of her time and attention.
Luke's possessiveness can change the alliances in the fanfiction. Other characters might side with Percy against Luke, or some might be influenced by Luke's possessive behavior and turn against Percy. This reshapes the power dynamics in the story.
One common theme could be loyalty. Hestia being possessive might show her extreme loyalty to Percy. Another theme could be protection. She may be possessive in order to protect Percy from various threats in the fanfiction world. Also, there could be a theme of love, not necessarily romantic, but a deep affectionate love that makes her possessive.
There's also 'Hestia's Protege'. In this fanfic, Percy becomes an unofficial protege of Hestia. It has some really interesting plot twists. For example, Percy learns some ancient secrets from Hestia that help him in his battles against the new threats emerging in the world of the gods.
One way their romance could be portrayed in fanfiction is through Percy seeking solace in Hestia's hearth. Hestia, being the goddess of the hearth, represents warmth and home. Percy, having gone through so many harrowing adventures, might find a sense of peace with her. They could share quiet moments by the fire, with Hestia listening to Percy's tales of his quests. Their relationship could be a slow - burn one, starting from Percy's initial respect for her domain and growing into a deep, unspoken affection as he realizes how much her presence means to him in a chaotic world of gods and monsters.