One example could be a story where Percy betrays his friends by accident, like revealing a secret that endangers them. His regret then drives him to go on a solo mission to fix the situation. The guilt makes him constantly second - guess his actions and relationships.
First, clearly define the act of betrayal. It could be something as simple as breaking a promise. Then, show Percy's initial reaction which might be shock at his own actions. For the regret part, have him think back on the good times before the betrayal and how he's now ruined things. For the guilt, make him avoid eye contact or be overly self - critical in his internal monologue.
One possible storyline could be that Percy is forced to betray the Avengers due to some sort of mind control. Maybe an enemy has a powerful device or magic that compels him to act against the team. Another could be that Percy is misjudged by the Avengers. They think he has betrayed them because of some false evidence planted by a villain who wants to create chaos within the group. For example, a villain might make it look like Percy has leaked important information about the Avengers' plans.
In some fanfictions, Merlin's betrayal could be a misunderstanding. For instance, he could be framed by an evil sorcerer. The sorcerer might use magic to make it seem like Merlin has given away Camelot's battle plans or something similar. This would lead to Arthur doubting Merlin and Merlin having to prove his innocence.
In some fanfictions, Remus might feel guilty for endangering others during a full moon. For comfort, a writer could depict a scenario where a fellow wizard creates a special charm to ease his pain and guilt. This charm could also have a side - effect of making Remus feel more connected to his human side, which in turn helps him deal with his negative emotions.
Well, in some fanfics, Serena might betray Ash because she gets influenced by a new ideology. For instance, if she joins a group that has a different view on Pokémon training and they convince her that Ash's methods are wrong. Then there are those where she accidentally betrays him, like when she gives away some of Ash's training secrets to someone she thought was a friend but was actually a spy. It really depends on the creativity of the fanfic writer.
One common plot could be a power struggle within the group. Maybe Piper feels Percy is getting too much attention and decides to betray him to gain more influence. Another might be a misunderstanding where Piper is tricked into believing Percy has done something terrible and she acts against him. Or it could be related to a prophecy that makes Piper think Percy is a threat to the safety of their friends.
One example could be 'The Scarlet Letter' by Nathaniel Hawthorne. Hester Prynne is shunned due to her association with the act of adultery. Even though she is the one who committed the act, the whole town's attitude towards her is a form of 'guilt by association' as her child is also affected. Another could be 'To Kill a Mockingbird' where Tom Robinson is considered guilty in the eyes of some just because he is a black man in a racially charged environment, and his association with the white family he worked for is also misconstrued.
A wife might cheat with a neighbor. She starts acting strange around the neighbor when her husband is present. She feels guilty when she hears her husband talk about how much he trusts the neighbors. She may start having nightmares about her husband finding out. Her guilt also shows in her decreased interest in her own home. She no longer cares about decorating or making it a nice place as she is preoccupied with her secret relationship.
😋I recommend the following novel to you: 1. "Ex-husband, Regret Forever": The story of the female protagonist who was heartlessly divorced by her ex-husband and was forced to wander around. In the end, she knelt down in a nightclub for her daughter and was humiliated by her ex-husband. She swore to make her ex-husband regret it, but he really did. When he saw his ex-wife, who was once in a sorry state, elegantly holding another man's hand, he was so jealous that he went crazy. 2. "He Regrets After Getting Out of Prison": The female lead was sent to prison for a crime, and she was tortured and destroyed by the male lead. After the female protagonist regained her freedom, the male protagonist kept pestering her. He only regretted it after the female protagonist died. 3. "After the Divorce, the CEO's Wife Regrets": The male protagonist was imprisoned for three years for love in exchange for a divorce agreement. The female protagonist thought that he was mediocre and incompetent. Now, the female protagonist was regretting and crying. 4. "Reporting to Father: Mother Eloped": The female protagonist was reborn after falling off a cliff and returned with a beautiful man. However, the nominal "husband" was entangled again. He always thought that a sentence of "regret" could make up for his past mistakes. 5. "Girlfriend Taken Home: Young Master, Please Be Careful": The female protagonist picked up a little white dog and was despised by the male protagonist. Later on, the female protagonist realized that the male protagonist's kindness to her was not sincere. After the male and female protagonists broke up, the male protagonist regretted it. I hope you like this fairy's recommendation. Muah ~😗
One great 'Percy Jackson guilt fanfic' could be about Percy feeling guilty for not being able to save all his friends during a battle. Maybe in the story, he constantly has nightmares about their deaths and tries to find ways to make amends. Another could focus on his guilt over accidentally using his powers in a way that hurt someone he cared about. He then goes on a journey to learn better control.