I'm not sure which specific 'percy sick fanfiction' you're referring to. There are many fanfiction platforms like Archive of Our Own (AO3) where you can search for such stories. Try using relevant tags like 'Percy' and'sick' on AO3 to find what you're looking for.
In this kind of fanfiction, one scenario could be that Will Solace uses his healing powers to try and cure Percy. He might be really worried as Percy is not only his friend but also someone he cares about deeply. Maybe he brings Percy to the infirmary in Camp Half - Blood and stays by his side, constantly checking on his condition and using his medical knowledge and powers to make Percy better.
One popular 'Percy Jackson sick fanfiction' is 'Under the Weather'. It shows Percy dealing with a strange illness that even his demigod powers can't easily shake off. The story does a great job of exploring how his friends, like Annabeth, react and try to help him.
In the 'percy is sick fanfiction', perhaps there's a magical or special element to his sickness. It could be a curse that only certain remedies can cure, and his friends embark on a quest to find those remedies. They might face various challenges along the way, all while Percy is lying in bed, getting weaker. His friends' determination to save him would be a central part of the story.
One common theme could be the care and concern of other characters for Percy. For example, his friends might be worried and take care of him.
One great Percy Weasley sick fanfiction is 'Percy's Plight'. It delves into Percy getting a mysterious illness during his time at the Ministry. The story does a wonderful job of showing how his family reacts and tries to take care of him while also dealing with Percy's stubborn nature.
One place to find such fanfiction could be Archive of Our Own (AO3). Just search for 'Percy Jackson Will Solace x Sick' on their site and you'll likely come across some great works. AO3 has a large and diverse collection of fanfictions for all kinds of pairings and themes.
Well, one possibility is that Percy's friends try to find a cure. Maybe Annabeth uses her wisdom to research in the library of Camp Half - Blood while Grover tries to use his nature - related powers to find some special herbs. And Percy is just lying in his cabin, feeling really weak and feverish.
Obviously Percy would be one of the main characters as he is the one who is sick. His best friends like Annabeth and Grover would likely also be main characters as they would be taking care of him or trying to find a cure for his illness.
One common theme is family unity. When Percy is sick, it often brings his family together. For example, in many fanfictions, the Weasley family puts aside their differences with Percy (like when he was estranged from them in the books) to take care of him. Another theme is Percy's self - discovery. Being sick makes him reevaluate his life and his relationships.
One possible scenario could be that in the fanfiction, the sick person is a demigod who has been poisoned during a quest. Percy Jackson and Will Solace team up to find a cure. Percy uses his water - related powers to purify some of the ingredients needed for the antidote, while Will Solace, with his healing skills, tries to keep the sick demigod stable. They face various obstacles along the way, like monsters trying to stop them from reaching the final ingredient. In the end, they manage to save the sick demigod and strengthen their friendship.