Well, perhaps in this fanfiction, Jason is possessive of Percy because he feels that Percy is the only one who truly understands him. They could have a unique connection that others don't have. Also, it might be a result of jealousy. If there are other characters showing interest in Percy, Jason's possessive nature could come out as a way to keep Percy close to him.
In the fanfiction, it could be that Jason has been through a lot with Percy. They might have shared many adventures and experiences that made Jason feel like he has a sort of claim over Percy. It could also be related to the world - building in the fanfiction. For example, if there are certain power dynamics or alliances that make Jason protective and possessive of Percy. Another aspect could be that the author wants to explore a complex relationship dynamic between the two characters, where Jason's possessiveness adds an interesting layer to the story.
One possible reason could be a deep emotional bond. Maybe Gaara has seen Naruto's unique strength and kindness, which makes her feel a strong connection. It could also be due to a sense of protection. Naruto might have been in situations where he was vulnerable, and Gaara's possessiveness is her way of ensuring his safety.
Love is a big reason. She loves Percy deeply and is afraid of losing him. In the world of the fanfiction, there could be many threats to their relationship, so she holds on tightly.
Well, it could be that in the fanfiction, Percy and Thalia are both really popular and well - liked among their peers. Jason, on the other hand, might feel overshadowed by them. He's jealous because they seem to get all the attention and admiration, while he feels like he has to struggle more to be noticed.
One possible reason could be envy. Maybe Fleur sees Hermione's intelligence and skills and feels threatened. So she becomes possessive to try and keep Hermione in a certain place or relationship where she can control her influence. Another reason might be that Fleur has some deep - seated insecurities. Hermione is well - liked and respected in the wizarding world, and Fleur, perhaps unconsciously, wants to claim Hermione as 'hers' to boost her own status. It could also be a case of misinterpreting friendship for something more possessive. If they are friends in the fanfic, Fleur might not know how to handle her strong feelings for Hermione in a healthy way and ends up being possessive.
It can create conflict. For example, if other characters don't like Jason's possessiveness, it can lead to arguments or even fights.
Well, it could be because they both care deeply about Nico in different ways. Maybe Jason sees Nico as a great friend and ally, and Percy feels the same but in a more possessive way. In fanfiction, authors often play with these complex relationships to create drama.
One reason could be that he sees something special in Sakura. Maybe he admires her strength or her kind heart, and he doesn't want to lose her to someone else who might not appreciate her as much as he does.
One reason could be Percy's more fluid connection to his powers. Since he's been using his water - based powers for a long time, he's more in tune with them compared to Jason. So in a power - based showdown, Percy would have an upper hand.
One reason could be Jason's popularity. Maybe Jason is getting more attention from their peers or the gods, which makes Percy jealous. Another might be related to a girl they both like. If the girl shows more interest in Jason, Percy could feel jealous.
In the fanfiction, it could be that Percy and Thalia have a long - established friendship. Jason, being new to their group or dynamic, might feel like he can't break into that bond. He may see how they rely on each other and communicate without words, and he wishes he could be part of that. The jealousy then stems from his desire to be as close to them as they are to each other.