Perhaps it could be a centaur who was once a great guardian of the forest but has been broken by the encroachment of dark forces. Or it could be a minor god who was supposed to protect a certain aspect of the world but has failed and is now in a broken state. There are many possibilities within the rich lore of Percy Jackson.
First, really understand Percy's character. Think about what could break his heart. It could be something like Annabeth leaving him for some reason. Then, start with a strong opening that shows his broken state, like 'Percy stared at the empty space where she used to be, his heart feeling like it had been ripped out.' Build on his emotions, use descriptive language to show his pain, and also think about how he might interact with other characters in this state.
One great 'Percy Jackson broken heart fanfiction' could be 'The Shattered Heart of Percy'. It delves into Percy's feelings after a major loss in his love life. It shows how his usual confident self crumbles and has to pick up the pieces. The author does a wonderful job of portraying his internal struggle and how he tries to move forward while still being haunted by the past.
Well, it could be about a guardian figure in the Percy Jackson world who has been broken in some way. Maybe a protector who has failed in their duty, or perhaps has had their spirit or power broken. It might explore their journey to redemption or how their broken state affects the other characters around them.
One example could be a fanfiction where the character relationships are completely distorted. For instance, if in the original Percy Jackson series, Percy and Annabeth have a strong, positive relationship, but in the broken fanfiction, they are constantly at odds for no good reason. Another might be a fanfiction that completely changes the rules of the demigod world, like making it so that demigods no longer have powers related to their godly parent. This disrupts the whole essence of the original story.
One way to fix a Percy Jackson broken fanfiction is to go back to the source material. Re - read the original books to get a better understanding of the world, the characters, and the themes. If the fanfiction has misrepresented the mythology, study the Greek mythology again and make the necessary corrections. When it comes to character development, if it's off track, think about how the characters evolved in the original series and try to replicate that in the fanfiction. Also, consider getting feedback from other Percy Jackson fans. They can point out the areas that need the most improvement and offer suggestions on how to make the fanfiction better.
One scenario could be Percy sacrificing himself to save his friends from a powerful and ancient evil. Maybe he faces off against a primordial being and uses his powers to hold it back long enough for his friends to escape, but at the cost of his own life.
One of the sad moments could be when a character like Annabeth is in a situation where she feels completely alone and betrayed. In some fanfictions, she might be separated from Percy in a cruel way, like being trapped in a different dimension where she can't reach out to him. This not only makes her character suffer but also tugs at the readers' heartstrings as their relationship is so central to the series.
One consequence could be Percy feeling betrayed. He has always been a hero for the gods, but if they keep breaking their promises, he might lose faith in them. This could lead to him distancing himself from the world of the gods and focusing more on his own life or the lives of his mortal friends.
Maybe Percy breaks his ribs in a training accident at Camp Half - Blood. This could lead to him feeling frustrated as he can't participate fully in activities. He could then discover a new way to train or gain power while recovering, perhaps by learning more about his demigod heritage in a different way.