One possible trigger could be academic pressure. Maybe Percy has a big test or a difficult assignment that he feels unprepared for. Another trigger might be social situations, like being bullied or feeling left out by classmates. It could also be related to a specific location in the school, such as a crowded hallway or a particular classroom where something bad happened before.
Annabeth would be a likely helper. She's very perceptive and has been through a lot with Percy. She would probably be able to sense something was wrong and offer her calm and rational presence to help him through it. Grover could also be there. He's Percy's loyal friend and his empathy for Percy's situation would make him a great support. He might even use his nature - related powers to create a more soothing environment for Percy.
Well, it could be about Percy being in a very stressful situation like facing a powerful enemy he's not sure he can defeat. This causes him to have a panic attack. Maybe he starts hyperventilating and his friends have to come to his rescue and calm him down.
Friends could help Percy by distracting him. For example, they could tell a funny story or joke to take his mind off the panic. They might also encourage him to engage in relaxation techniques, like deep breathing exercises together. If they know what triggers his panic attacks, they could try to shield him from those situations, like if it's a certain person, they could keep that person away from Percy.
Well, it could be due to social pressure. Maybe Percy is being bullied or feels left out by classmates. In school, the fear of not fitting in can be overwhelming.
Obviously, Percy would be the main character as it's about him having a panic attack. His friends like Annabeth and Grover could also be important characters. Annabeth might be the one who tries to use her intelligence to figure out what's wrong with Percy and how to help him. Grover could use his empathetic nature to comfort Percy during the panic attack.
One possible storyline could be Percy trying to hide his panic attack from his friends at school because he doesn't want them to worry. He might run off to a secluded spot like an old janitor's closet to deal with it on his own. Another could be that a new monster shows up at school disguised as a student or teacher, and Percy's panic attack is triggered by his sensing of the monster but not being sure where it is. Or perhaps Percy has a premonition of a future danger during a class, which causes the panic attack and he then has to figure out how to prevent what he saw from happening.
One aspect to consider in this fanfiction is the setting. If it's set at Hogwarts, the familiar yet often stressful environment can enhance the panic. The old corridors and the constant presence of peers and professors can all contribute to Draco's sense of unease.
One possible fanfiction could be Percy having a panic attack during a battle. Maybe he's facing a new and extremely powerful monster that reminds him of past traumas. He starts to hyperventilate, his hands shaking as he tries to grip his sword. His friends notice but are momentarily too occupied to fully assist him, adding to his sense of isolation and fear.
One common theme is friendship. His friends often play a crucial role in helping Percy through his panic attacks, showing the importance of support systems.