Ruth may initially be a bit of a control freak, but the unpredictability of pregnancy could force her to let go and be more flexible. This change in her character would be interesting to explore. Jay could grow in his ability to be a protector. He would be constantly looking out for Ruth and the unborn baby, which could transform him from a more laid - back person to someone with a real sense of purpose and determination.
One plot idea could be that Ruth and Jay face difficulties in their relationship due to the unexpected pregnancy. Maybe they struggle with how to balance their work at the hospital with preparing for the baby. Another could be that they initially keep the pregnancy a secret from their colleagues, but as Ruth starts to show, they have to deal with the reactions and support (or lack thereof) from those around them.
As a couple, they could develop better communication skills. The pregnancy is a big change, and they need to talk about their fears, hopes, and plans. They might start to understand each other on a deeper level, like Rumple realizing how much Belle is sacrificing for their family, and Belle seeing Rumple's insecurities about being a good father. This could lead to a stronger, more loving relationship.
Aaron might become more protective. He could start to think more about the future and become more responsible. Robert, on the other hand, may struggle at first with the idea but then grow into a more nurturing role. He could become more in tune with his emotions.
Derek could become more responsible. He might start taking on more household chores, like cooking healthy meals for Casey, and be more protective of her. Casey, on the other hand, could develop more patience. Dealing with the hormonal changes and the physical discomfort of pregnancy, she learns to control her temper better and communicate more effectively with Derek.
During the pregnancy, Harry might develop his magical skills in new ways. Maybe he starts to study some old and forgotten spells that could protect his family better. Fleur could develop her relationship with the wizarding community in Britain. Since she is from France, she might have been a bit of an outsider before, but now with the pregnancy, she becomes more involved. She could start teaching some Beauxbatons - style magic at Hogwarts, which not only helps her integrate but also enriches the Hogwarts curriculum. Harry would support her in this, and their relationship would grow as they both expand their horizons.
Doug could develop by becoming more responsible. For example, he might start taking on more household chores or saving money for the baby. Evie could become more patient as she has to deal with the physical and emotional changes of pregnancy. She might also learn to rely on Doug more.
Eric could develop into a more responsible and empathetic character. With Ariel being pregnant, he has to think about not just her, but also the future of their family. He might become more involved in the community to ensure a better world for their child. Ariel could become more patient. The pregnancy might slow her down, and she has to learn to accept that. She could also develop a deeper connection to the human world as she's bringing a new life into it.
During pregnancy, Maleficent could struggle with her identity. She's known as a dark and powerful figure, but now she has a new life growing inside her. This could lead to an internal conflict as she tries to balance her old self with the new role of a mother. Aurora, in contrast, might find new strength in her pregnancy. She could become more assertive in protecting her kingdom and the future of her child, using her natural grace and leadership skills in new ways.
Courtney's character could develop by becoming more nurturing. She was always a bit of a control - freak, but with the pregnancy, she might learn to let go a bit and rely on Duncan more. Duncan, on the other hand, could become more responsible. He used to be rebellious, but now he has to think about his family. He might start to see the value in stability.
Ririchiyo could become more protective and nurturing. Her usually strong - willed and sometimes aloof nature might soften as she focuses on the life growing inside her. Miketsukami, on the other hand, would likely become even more devoted to Ririchiyo and the baby. He might show more assertiveness in protecting them both.