Maybe it's because of his godly parent. Jason is the son of Jupiter, the king of the gods in the Roman pantheon. This high - status parentage might make him feel superior to Percy, who is the son of Poseidon.
In the fanfic, if there are battles or challenges, Jason could have had more victories. These successes might have inflated his ego and made him think he's better. For instance, if he's better at handling political situations within the demigod community compared to Percy.
It could be his sense of duty. Jason is often very duty - bound, and he might see Percy as being more impulsive. So he believes his more restrained and dutiful nature makes him better. He may think that Percy's actions sometimes put others at risk because of his impulsiveness, while he himself is more calculated.
Well, in such a fanfic, it could be that Jason believes he has certain skills or qualities that Percy lacks. Maybe Jason thinks his leadership in the Roman camp gives him an edge. For example, his military strategies might seem superior in his own eyes.
Well, Percy has his water powers which are extremely versatile. He can control water in all forms, use it for defense and offense. For example, he can create huge waves to overpower enemies. Also, his connection to the sea is very deep and it gives him a constant source of power, which might make him stronger than Jason who mainly has wind and flight - related powers.
It could be that the author of the fanfic has created a rivalry between them. In some fanfics, authors like to add tension and conflict, and Jason hating Percy could be part of that. Maybe Percy got more attention or praise in the story, and Jason, being a proud character, resents that.
Well, Percy has some really cool powers like controlling water. He can create huge waves or even use water to heal himself sometimes. Jason, on the other hand, while also powerful with his control over the wind and lightning, Percy's powers seem more versatile and his character development in the fanfictions is often more in - depth, making him more impressive.
Maybe Jason is interested because he wants to know different interpretations of Percy. Fanfic can offer unique perspectives.
Well, it could be that there's some sort of magic or illusion at play. Jason might be seeing Percy as a god because he's been influenced by an external force. This external force could be an enemy trying to create chaos by making the other demigods believe Percy is a god. And Percy has to then figure out what's going on and clear his name while also dealing with the new - found respect or fear from his peers.
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 Grace may have had some bad experiences with Percy Jackson fanfics. For example, he might have read some that were really poorly written, with inconsistent plots or offensive content. This could have led him to form a general dislike for all Percy Jackson fanfics.
Perhaps Jason has his own ideas and interpretations of Percy, and the fanfiction goes against those. Fanfictions are often a creative exploration by different authors, and not all of them might align with Jason's view of Percy. He might be scared that these fan - made stories could influence how others see Percy in a way he doesn't like.
In fanfiction, it could be related to their popularity among other characters. Percy might be more liked or have more friends, making Jason jealous. It could also be about their achievements. Percy may have accomplished more heroic deeds that overshadow Jason's, leading to his jealousy.