Well, Beckett and Josh are the main characters. Beckett might be a person with a good heart but makes a bad decision when it comes to loyalty in relationships. Josh could be the catalyst for this unfaithful behavior. They are the ones around whom the entire plot of cheating will revolve, and we can expect to see their character development, whether it's towards redemption or further down the wrong path, as the fanfic unfolds.
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.
It's possible that Beckett and Josh are characters in a fantasy - themed fanfic. Beckett could be a wizard in training and Josh a brave knight. They secretly meet because there are dark forces in the kingdom that would not approve of their alliance. Their meetings are crucial for sharing knowledge and planning strategies to save the kingdom from impending doom.
It might involve Beckett and Josh getting involved in a cheating scenario in a very specific setting, like in a school or a workplace. For example, they could be working on a project together and the long hours and shared experiences draw them closer in an improper way. They then have to deal with the consequences of their actions, like guilt and potential discovery.
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.
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.
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.
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.
It depends on the specific fanfic. Some might depict Beckett as cheating, while others may not.
The parents of the Beckett baby would surely be main characters. They would be in a state of panic and desperation, driving the story forward with their search for their child.
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.
The main characters would be Beckett and Castle, as the title implies. Beckett is likely to be the one taking some sort of action in relation to Castle.