One possible storyline could be about the challenges she faces during her pregnancy. For example, how she deals with the physical changes and the reactions of those around her in her fictional world.
Another option is that it could be a character from a different species entirely. This could create a whole new set of plotlines and conflicts, such as how the two different species will interact because of the pregnancy and what it means for their respective cultures.
One possible theme could be the exploration of new relationships. For example, how the situation of the queen being pregnant might change her interactions with other characters. Maybe it leads to unexpected alliances or rivalries.
I'm sorry, I'm not aware of specific 'pregnant queen chrysalis fanfic' stories. You could try searching on fanfic platforms like Archive of Our Own (AO3). They have a wide range of fan - created content and you might be able to find something related there.
One storyline could be that a character accidentally gets pregnant. For example, if it's a minor character, she might be scared to tell her parents. So she turns to the main characters for help. They then have to figure out how to support her without getting in trouble themselves.
One possible storyline could be about Gwen facing the challenges of being a superhero while pregnant. She might have to deal with villains who try to take advantage of her condition. Another could be her preparing for the arrival of the baby, like setting up a nursery with her friends and family's help. And also, there could be a story where she discovers new powers related to her pregnancy that help her protect herself and the unborn child.
A storyline might involve D.Va facing the physical and emotional changes that come with pregnancy. She could be worried about how her pregnancy will affect her performance in combat, or she might have to deal with the public's reaction to the news. There could also be a focus on her support system, such as her family and friends helping her through this new phase in life.
Perhaps the fanfic could explore the relationship between Sadayo Kawakami and the father of the child. If it's a character from the Persona 5 universe, how do they react to the news? Do they support her? Or is there some sort of drama or tension between them? It could also show how the other characters in the game react to her pregnancy, whether they offer help or have different opinions about it.
One common theme could be power dynamics. Queen Chrysalis is a powerful character, and in lemon fanfic, this power might be explored in relation to romantic or sexual situations. Another theme could be transformation, as she is a character associated with change and metamorphosis.
Perhaps the pregnancy is a prophecy - a sign of great change. In the fanfiction, it could lead to new alliances. For example, other deities who were once her enemies might now approach her to offer protection or form an alliance. The Raven Queen would then have to decide if she can trust them, all while preparing for the new life within her.
In a fanfic, Chrysalis could be pregnant after falling in love with an unexpected character. This could be a pony from Canterlot who saw past her villainous exterior. As she becomes pregnant, she has to navigate the complex world of pony society and the expectations of her own Changeling kind. She might face discrimination from both sides, but also find some unexpected allies who support her during this difficult time of pregnancy.