Percy might become more independent. Without his mom's presence, he has to rely more on himself. He could start to take on more leadership roles within the demigod community. He also may develop a darker side to his personality, as the pain of his mom's death lingers. However, through his experiences and the support of his friends, he gradually learns to balance this new, harsher side with his original kind - hearted nature.
Percy often becomes more somber. He may lose some of his initial naivete. For instance, he might be more cautious in his actions, thinking twice before jumping into a fight like he used to.
One possible plotline could be Percy's journey of grief and how he copes with the loss. He might become more withdrawn at first, then gradually find strength in his friends and his quest. Another could be his search for a way to bring his mom back, perhaps delving into dangerous magic or making deals with powerful beings. Maybe he also has to face the fact that his mom's death was part of a larger plan by the villains and he has to stop them from achieving their ultimate goal.
Another theme is growth. After his mom's death, Percy often has to grow up faster and become more independent. Fanfics might show him taking on more responsibilities and maturing in ways he wouldn't have if his mom was still alive. For example, he may become more decisive in battles or in dealing with other challenges. In some fanfics, there's also the theme of legacy. Percy might discover things about his mom that she left behind for him, like a hidden power or a special message. This gives him something to hold on to and also adds to the idea that his mom's influence still lives on even though she's gone.
There could be a fanfiction titled 'Percy's Struggle After Losing His Mom'. In this, it could show Percy having flashbacks of his mom during battles or difficult times, and how those memories both haunt him and give him the will to keep going. It might also include how he tries to honor his mom's memory in different ways.
One 'percy's mom dies fanfic' that might be touching is 'A Mother's Legacy'. It delves deep into Percy's grief and how he copes with the loss, showing his journey of self - discovery after such a tragic event.
Zoe could become more withdrawn initially. Losing Percy, who was perhaps a close friend or love interest, would be a huge blow. But then, she might slowly turn her grief into strength. For example, she could become more determined in her fights, using Percy's memory as a source of inspiration.
Grover could be a popular character. Since he's Percy's best friend, he might be involved in the fanfiction, perhaps helping Percy protect his mom or going on adventures with them. Another could be Annabeth. Her intelligence and skills could be useful in the stories, like when they are facing a difficult situation and she comes up with a clever plan.
He could also become withdrawn and depressed. Percy and Annabeth have a very strong bond, and her death would leave a huge void in his life. He might isolate himself from his friends and family, lost in his grief and memories of her.
After Percy's death, the story could focus on Jason's guilt. Since Percy died saving him, Jason might feel responsible and try to take on more dangerous quests to make up for it. Annabeth could go on a journey to find a way to bring Percy back, which could lead to new adventures and discoveries. The demigods might also face a new threat that they struggle to deal with without Percy's skills. They would have to learn to rely on each other in new ways and develop new strategies.
At first, Percy would be in a state of shock. His development would start with this numbness, but as time passes, it would turn into a seething anger. He would start to see the world in a more cynical way. He might become more solitary, spending long hours training or researching how to get revenge. His loyalty to the camp could be tested as he blames the camp's security or lack thereof for Annabeth's death. However, in the end, he could also grow to be more empathetic towards others who have lost loved ones, as he has now experienced that pain deeply.