I'm not sure which comic you're referring to. However, based on the information you provided, I can provide you with some possible descriptions of the novel.
If you're referring to the works in Quick Reading Comics, then there might be a work called Death Castle. The story was about a male protagonist who had died in a castle, but the people in the castle would invite new people to visit. You can search for the work on the Quickread Manga website or find other readers 'comments and reviews to learn more.
If you are referring to other works, please provide more information. I will try my best to help you.
Some popular castle fanfiction might include those that explore different romantic scenarios between the main characters. For example, stories that focus on their early days of partnership and how their relationship could have developed differently.
Well, it really depends on the specific characters. For example, Castle himself might be flattered by some of the fanfiction that portrays him as an even greater detective or a more charming writer. Beckett, on the other hand, might be a bit more reserved in her reaction. She could be critical of any fanfiction that strays too far from the facts or that misrepresents her in a way she doesn't like. And the other minor characters like Ryan and Esposito might just have a good laugh about it all, enjoying seeing themselves in different fictional scenarios.
Well, usually when Castle leaves Beckette in such fanfics, it causes a lot of emotional turmoil for both. There could be moments of self-reflection for Beckette, and maybe Castle realizes his mistake and tries to come back. It all depends on the author's imagination!