One common theme is the exploration of their relationship dynamics when they are about to become parents. It often shows how they support each other during the pregnancy.
Another theme could be the reactions of their friends and family. For example, how Dan or Amenadiel react to the news of Chloe's pregnancy. It adds an extra layer of drama and family - like feel to the story.
The anticipation and fear of the unknown in terms of the baby's future also feature often. Since Lucifer is, well, Lucifer, there are concerns about the nature of the child and how they will fit into the human - celestial world. This theme can lead to a lot of interesting plot developments and character growth.
Redemption is also a big one. Given Lucifer's character arc in the show, fanfiction often delves deeper into his journey of self - discovery and redemption, especially in relation to Chloe. She's like his anchor in this process. For example, in many fics, we see how he tries to be a better person because of his love for her.
One common theme is love conquers all. Their relationship often faces various challenges like Lucifer's devilish nature and Chloe's human morals, but love always seems to prevail in these fanfictions.
The theme of Lucifer's struggle with his devilish nature and Chloe's influence on him is also quite prevalent. Chloe represents the good and the human side, and she often challenges Lucifer to be better. Fanfiction might explore how he changes over time because of her. Also, the idea of their eternal bond, whether it's fated or just a strong connection they've developed, is a popular theme.
One common theme is the breaking of barriers. Since Lucifer and Chloe have a complex relationship in the original series, the kiss in fanfiction often represents them overcoming some sort of obstacle, be it emotional or related to their different natures.
The theme of good vs. evil is common too. Chloe, representing the good, and Lucifer, with his devilish past, come together. Fanfics often play with this dynamic, like how they influence each other's views on morality and how they navigate the world with their different natures.
Another theme is the battle between good and evil. Lucifer, being the devil, constantly struggles with his nature. In fanfic, this can be shown in different ways, like how Chloe influences him to lean more towards good. It also delves into the idea of redemption, which is related to the good - vs - evil theme.
One common plot idea is how they deal with the challenges of having a baby while Lucifer is still adjusting to his life on Earth. For example, he might be worried about his devilish nature affecting the baby in some way.
Maybe the pregnancy is unexpected, and they initially panic. But then they start to get excited about building a family together. Chloe could start to train Lucifer on how to be a good father, like teaching him about baby care and normal family values, which would be a big change for him since he's from Hell.
One potential antagonist could be Lucifer's father. He might not approve of the union or the baby, seeing it as a disruption to his grand plans or as something that could change Lucifer in a way he doesn't want. Another could be some of the demons from Hell who see the baby as a potential threat to their power or existence if it has some sort of unique abilities.
One common theme could be the couple's journey towards preparing for the baby. This might include things like setting up a nursery or dealing with the emotional changes that come with impending parenthood.