There could also be Beckett's fiancé in the story. He is an important character as Castle is stopping Beckett's wedding to him. His presence might be the very reason Castle feels the need to act.
The main characters are Castle and Beckett, obviously. Castle is likely to be the one who intervenes in Beckett's wedding. Beckett is the one whose wedding is being stopped.
Maybe other characters from the original series, like Beckett's friends or Castle's family, could be involved too. They might play roles in either supporting or opposing Castle's attempt to stop the wedding. For instance, Beckett's friends could initially be against Castle but later realize he's right.
Maybe Castle realizes he can't live without Beckett and confesses his love at the last minute, which stops the wedding. For example, he could show up with some big revelation about their relationship that makes Beckett question going through with the wedding.
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.
A Castle and Beckett baby fanfic could be about their journey into parenthood. It might explore how they adjust to having a baby in their lives. For example, Castle could be super excited and start writing new stories inspired by his new family experience, while Beckett might be a bit more cautious and protective.
In a fanfic where they have a baby, their relationship would shift. They would now be partners not only in crime - solving but also in parenting. Castle would likely become more domesticated, helping with diaper changes and midnight feedings. Beckett would have to learn to let Castle in more on the parenting front, and they would communicate more about family - related matters. This new aspect of their relationship would add a different layer of complexity and closeness to their bond.
There could be. The Castle fandom is quite creative, and a pregnancy plot for Beckett is a popular trope in fanfiction. Some fanfics might focus on the romantic aspect of it, with Castle being over - the - moon and taking extra care of Beckett. Others might explore the more practical and challenging sides, such as Beckett still trying to solve cases while dealing with pregnancy symptoms.
In a fanfic, their first kiss might occur during a more emotional moment. For example, Beckett could be sharing a deep, personal story from her past. Castle listens intently, and when she finishes, he just leans in. It's a kiss that's both a comfort and a new beginning, a way to show that he's there for her not just as a partner in crime - solving, but also as someone who cares deeply about her on an emotional level.
He could react with anger. After all, if he has feelings for Beckett, seeing her with someone else like Vaughn might make him furious. He might lash out at both Beckett and Vaughn without really understanding the situation.
Esposito and Ryan are very likely to be involved. They are Castle's friends and colleagues, and they would probably be there to support the couple. They might offer their own brand of humor and help out in practical ways, like throwing a baby shower for Beckett and Castle. Also, Martha, Castle's mother, would surely be a central figure. She could offer her wisdom on pregnancy and child - rearing, and add some comical moments with her unique personality.
One possibility in a Castle and Beckett jealous fanfic could be a new character entering the scene. For example, a famous detective from another precinct comes to help on a case. This detective might show a romantic interest in Beckett, which makes Castle jealous. He starts to act out, being overly protective and a bit more sarcastic than usual. Beckett, on the other hand, might not notice Castle's jealousy at first, thinking he's just being his normal self. But as time goes on, she realizes his feelings and it could lead to a big confrontation between them, which ultimately strengthens their relationship.
There's also 'Beyond the Case'. This fanfic takes their story to new heights by adding some interesting plot twists outside of the normal case - solving scenarios. It shows how their relationship might develop in different, more challenging situations. It's a great read for fans who want something a bit more out of the ordinary.