Well, in 'alexis has cancer fanfic', a frequent theme is the emotional journey. It could include Alexis coming to terms with her illness, her fear, and her hope. Also, the theme of how cancer affects her relationships, like with a love interest, might be explored. It could show how they support each other through the tough times or how the relationship changes because of the illness.
Since it's a fanfic, it could go in many different directions. It could be a tragic story where Castle succumbs to cancer, or it could be an inspiring one where he overcomes it. It might also be a story that focuses more on the emotional and psychological aspects of having cancer, such as the fear, the anger, and the acceptance. It could also be set in a particular fictional universe that the original Castle concept belongs to, and the cancer plot could be intertwined with the existing storylines and characters from that universe.
Alexis might confront Beckett directly. She could say something like 'I think you're cheating on me. What's going on?' This is a very straightforward approach.
A lawyer could be an important character. This lawyer takes on Alexis's case, believing in their innocence. The lawyer has to battle a corrupt legal system or powerful opponents who want to see Alexis locked up for good. The fanfic could show the lawyer's strategies and how they build a case in Alexis's favor.
Perhaps there have been some rumors or whispers in their fictional world that have reached Alexis' ears. Even if they are baseless, they can plant the seed of doubt in Alexis' mind, making her think that Kate is cheating.
She could be defensive of Beckett. Since Alexis probably has a good relationship with Beckett, she may try to convince Castle that he's wrong and that Beckett didn't mean any harm. For example, she might tell Castle about all the positive things Beckett has done for her.
One 'percy has cancer fanfic' that stands out might be those that focus on Percy's emotional journey. It could show how he copes with the diagnosis, his relationships with friends and family during this tough time. For example, in some fanfics, his friends might rally around him, providing support in different ways like staying by his side during chemo sessions or just being there to listen when he's feeling down.
Well, first off, AO3 is a great place to look. It has a large collection of fanfics from various fandoms. Another option is to check any dedicated fan communities related to the 'Castle' franchise. They might have discussions or links to such fanfics. Sometimes, even a simple Google search with the exact phrase 'castle has cancer fanfic' might lead you to where it's hosted, but be careful of unreliable sources.