Well, in many fanfictions, Percy might be seen as too ambitious and career - focused. He could have made choices that put his job at the Ministry above his family. For example, he might have supported Ministry policies that the rest of the Weasleys disagreed with, like their stance on Harry Potter or how they were handling the growing threat of Voldemort. This could lead to the Weasleys being mad at him for seemingly choosing the wrong side or not standing by the family values.
The Weasleys could also be the ones to reach out first. They might realize that Percy was in a difficult situation at the Ministry and that he didn't mean to cause them harm. So they forgive him and they all work together to face whatever threats are out there, like Voldemort's return.
One possible reason could be a misunderstanding. Maybe there was a miscommunication about something important, like a plan to fight against the Dark Arts. For example, if the Weasleys accidentally left Hermione out of a crucial part of the plan, she might be very angry.
In such fanfictions, one reason could be Percy's ambition. He was often very career - driven and sometimes put his work for the Ministry above his family. This made the Weasleys, who were a very family - oriented group, feel neglected and thus blame him.
Well, in some fanfictions, Percy might be mad at Annabeth because of a misunderstanding. Maybe she made a decision without consulting him in a crucial situation regarding their adventures. For example, if she chose a path that put their friends in danger without his input, Percy could get angry.
Well, they could start with an honest conversation. The Weasleys could sit down with Hermione and ask her what's wrong. For example, Ginny could take the lead and say, 'Hermione, we know you're mad at us. Let's talk about it.'
Eventually, he may reach a point of self - reflection. After some time, Percy might realize that his family's feelings are also important. He could start to reevaluate his actions and his priorities. In some fanfictions, this could lead to him trying to mend the relationship with his family, even if it's a slow and difficult process.
One possible reason could be a misunderstanding. Maybe Annabeth made a decision without consulting Percy, like choosing a quest path that Percy thought was too dangerous. Percy, being protective and having his own ideas about how things should be done, might get mad.
Often, the Weasleys come to understand Percy's perspective and show remorse by changing their behavior and making efforts to include him again in the family.
Since I don't have access to the 'percy is mad fanfiction', it's difficult to give a detailed account. However, generally speaking, if Percy is mad, the fanfiction could be exploring his emotions deeply. It might show how his anger affects his actions, decisions, and relationships. For example, if it's a fanfiction related to Percy Jackson, his anger could lead him to take risks he wouldn't normally take, or it could cause rifts in his friendships with Annabeth or Grover. It could also be a story about how he overcomes his anger and grows as a character.
It could be because of a misunderstanding. In the fanfic, perhaps Annabeth was seen talking to an old acquaintance who Percy doesn't trust. He might jump to conclusions and get angry with her without really knowing the whole story. Like, if he thought she was plotting something behind his back with that person.