Another plot twist could be that Cinder discovers some new power within herself during the pregnancy. This power could be related to her cyborg enhancements and the new life growing inside her. It could be a power that she has to learn to control, and it might even change the future of the kingdom in unexpected ways.
One possible plot twist could be that there are complications during the pregnancy. Maybe there are health issues for Cinder that Kai has to deal with while also handling his royal duties. This could put a strain on their relationship as they struggle to come to terms with the situation.
Their relationship could become stronger. The pregnancy might make them more protective of each other. Kai would be more attentive to Cinder's needs, and Cinder would feel more connected to Kai as they are about to start a family together.
Another plot could be about their wedding planning. Since they are from different backgrounds, there could be cultural clashes. For example, Cinder might have some traditions from her side that Kai's people find strange, or vice versa. And they have to find a way to incorporate both cultures into their big day while also making sure their families and kingdoms are happy. It could be a really sweet and comical story as they struggle with things like choosing the right wedding dress or the proper ceremony format. Also, there could be some jealous suitors from the past who resurface and try to break them up, adding some drama to the story.
One possible plot twist could be that Kai's dark magic starts to affect the pregnancy in unexpected ways. Maybe it causes strange cravings for Bonnie that are related to magic ingredients. Another could be that an old enemy of Kai discovers Bonnie's pregnancy and tries to use it against them.
Perhaps Kai kidnaps Elena to force her to help him with something. He might need her doppelganger blood to break a curse on himself or his family. In the process, Elena discovers a side of Kai that she didn't expect, and they form an unlikely alliance against a common enemy that emerges during the ordeal.
One of the common themes is adventure. Writers like to send Cinder and Kai on various adventures, whether it's exploring new planets or solving mysteries on Earth. This not only tests their relationship but also shows their individual growth. Also, sacrifice is a theme that pops up. They might have to sacrifice something for each other or for the greater good, which adds a lot of drama and emotional weight to the stories.
One common theme might be the exploration of their relationship in different scenarios. Maybe in some fanfictions, they face challenges together that test their bond.
The theme of redemption also appears. Cinder, with her past actions and the way she was treated, often finds redemption through her relationship with Kai. He helps her to see that she can be more than her past mistakes and that she has the potential to be a great force for good in their world.
The plot could involve Cinder's pregnancy being a result of some sort of experiment or magical mishap. She then has to figure out how to either keep the baby or reverse the situation, all while still being a major player in the RWBY universe. This could lead to some interesting interactions with other characters, like how they react to her new state and how she uses it to her advantage or disadvantage in her power struggles.
One possible plot twist could be that Kara's pregnancy somehow affects her superpowers. Maybe she loses them temporarily, which adds a whole new layer of vulnerability and drama. For example, she has to rely on her friends and Mon - El more than ever to protect her and the unborn child. Another twist could be that there are some unexpected genetic mutations in the baby due to their unique alien heritages, leading to a race against time to find a way to ensure the baby's health.
One interesting story could be where Cinder and Kai have a baby who shows extraordinary intelligence from a young age, inheriting Cinder's strong will and Kai's leadership skills. The baby might play a key role in bringing about new technological advancements in their world.