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.
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.
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.
In a fanfiction, Percy's panic attack can be a way to explore his fears on a deeper level. For example, he may fear that he's not really the hero everyone thinks he is. This panic attack can be a moment of self - reflection. He might question his actions, his decisions, and his very identity. This can lead to a more complex and nuanced understanding of Percy as a character, beyond just his heroic deeds.
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.
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.
To make it interesting, you can focus on the contrast between Percy's world and the Avengers'. For example, Percy's magic from the Greek gods is very different from the technology and superpowers in the Avengers' universe. When a panic attack occurs, this contrast can be highlighted. Maybe Percy's way of dealing with the panic attack is through some ancient Greek ritual, which the Avengers find strange but effective.
Well, a great Percy Avengers panic attack fanfiction could be centered around Loki. Imagine Loki, who is always so in control, having a panic attack after a failed scheme. Percy, being a demigod used to the treachery of the gods, understands his state of mind. He uses his knowledge of Greek magic and psychology to calm Loki down. Or perhaps it's a story where the Avengers are facing a new threat that is somehow related to Percy's world. The stress of this unknown danger causes one of the Avengers, like Natasha, to have a panic attack, and Percy has to step in to assist.
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.
Well, I remember reading a 'percy panic attack fanfiction' that was set in a modern AU. In this story, Percy's panic attacks are triggered by his school and social life stressors. It was quite unique as it explored how he coped without his usual demigod powers and just as a normal teenager dealing with mental health issues.