Obviously, Beckett would be the main character. But there could also be a hotel concierge who plays an important role. The concierge could be someone who is either very helpful to Beckett, guiding him around the hotel and the local area, or someone who is a bit of a troublemaker, causing difficulties for Beckett during his stay.
It could be about Beckett having a series of strange encounters at the hotel. Maybe he meets an old acquaintance who brings back memories, good or bad. For example, an old friend who he had a falling - out with and now has to deal with the unresolved issues in this new hotel setting.
One possible theme could be friendship. As they interact in the hotel environment, they could form a deep and meaningful friendship. Another theme might be self - discovery. Maybe through their conversations and experiences together, both Beckett and Josh learn more about themselves.
A coworker who has a crush on Beckett might be a main character. They could be the one who stays by Beckett's side the most during his recovery, and this could lead to a romantic sub - plot.
In such a fanfic, they could be there for a business meeting. Maybe they meet by chance in the hotel lobby and end up collaborating on a project. Beckett might be a bit reserved at first, but Josh's friendly nature breaks the ice.
Obviously, Beckett and his daughter are the main characters. Beckett is likely to be a protective figure, using his skills and knowledge to try and get them out of the trapped situation. His daughter, on the other hand, might be the source of hope or inspiration in the story, perhaps with her own unique ideas to contribute to their escape.
The main characters are obviously Beckett and Josh. Beckett seems to be a character who is involved in some sort of relationship that they are about to betray through cheating with Josh.
One possibility is that Castle has booked the hotel for a romantic getaway by himself, and seeing Beckett there completely throws him off. Beckett could be there for a much more serious reason, like following a lead on a dangerous criminal. Castle may start to worry about Beckett's safety and decides to stay close to her. As they interact more within the hotel, they might realize how much they've missed each other's company, and this chance meeting could be the start of something new between them, whether it's a new level of friendship or a re - awakening of their romantic feelings.
The plot could develop in many ways. For example, if it's a mystery - focused fanfic, Beckett's presence at the hotel could be linked to a big mystery. Castle, being a mystery writer, would be eager to get involved. They might start investigating together, exploring different parts of the hotel. As they do so, they could face various challenges and obstacles, which would bring them closer together. Along the way, they could also discover secrets about each other that they didn't know before.
His doctor could be a main character. The doctor could be portrayed as a very dedicated and empathetic person, constantly providing Beckett with hope and medical advice. For instance, the doctor might have to break some tough news to Beckett about the risks of the transplant, but also encourage him to stay positive.
Obviously, Beckett would be one of the main characters. There might also be her partner, if she has one in the fanfic's storyline. Her doctor or medical team could also be main characters as they play important roles in dealing with the complicated pregnancy.