One possible plotline could be Percy's journey of dealing with the diagnosis. He might initially be in denial, then gradually accept it and start treatments. Another could be how his friends and family react, like his friends rallying around him to keep his spirits up.
In this 'percy gets cancer fanfiction', a plotline could involve Percy's search for a cure outside of the normal medical means. He could go on a quest to find a magical or supernatural remedy. His relationship with his love interest might also change. They could grow closer as they face this difficult situation together, or there could be strain due to the stress of his illness.
One possible plot could be Percy trying to hide his cancer from his friends at Camp Half - Blood at first. He doesn't want them to worry or think he's weak. But as the symptoms get worse, he has to tell them. Then they all band together to try and find a cure, whether it's through mortal medicine or some magical demigod - related remedy.
One possible plotline could be Percy finding out he has cancer and having to deal with the reactions of his family. Some might be overly protective, while others might struggle to accept it. Another could be Percy supporting a family member with cancer, showing his growth and change from his more uptight self in the books.
A third plotline could be about Percy's mental and emotional state during his banishment. He could be dealing with feelings of betrayal, as he was banished. He might question his identity and purpose, and throughout the fanfiction, he gradually overcomes these doubts and insecurities, emerging stronger in character even if he's still trapped in Tartarus.
One possible plotline could be that Percy discovers his so - called friends have been secretly working against him all along. Maybe they spread false rumors about him, which makes everyone in his world turn against him. He then has to go on a journey alone to clear his name.
A possible plot point is the way Bella's love interests react to her illness. Maybe they become more protective or struggle to deal with the situation. Also, her friends might organize fundraisers or support groups for her, which could be another plot point.
One possible plotline could be that Percy has been betrayed by his closest friend. Maybe this friend revealed a big secret of Percy's, and now Percy feels isolated and heartbroken. He might start to question his relationships and his place in the world.
One possible plotline could be Percy's friends trying to break him out. They might have to overcome various obstacles like guards, traps, and security systems within the prison.
One possible plotline could be Hermione's search for a magical cure. She could travel to different parts of the wizarding world, seeking out ancient spells or potions that might heal her. Along the way, she might face various challenges and obstacles, like dark wizards who want to stop her from finding a cure because they see her as a threat to their power.
One possible plotline could be Naruto struggling to keep his ninja duties while dealing with the illness. He might try to hide it from his friends at first. Another could be him seeking out rare medical ninjutsu or herbs to cure himself. Maybe he teams up with some unlikely allies in his search for a cure.
Well, it could be that in this fanfiction, Frisk gets bullied because they come from a different background than the others. The bullies target Frisk for being an outsider. As the story progresses, Frisk could meet a mentor - like character who helps them gain confidence and teaches them how to deal with the bullies. Frisk might then use kindness and understanding to turn the situation around and make the bullies realize their mistakes.