One common theme is friendship. Writers often explore how Mal, Emma, and Regina could become friends despite their differences. Another theme is family, like how they could form a sort of found family.
Love triangles can be a theme as well. There could be a situation where there are romantic feelings involved between the characters in different combinations, like Emma having feelings for Mal while Regina has feelings for Emma, or something similar. This creates a lot of drama and interesting plotlines in the fanfictions.
One common theme is redemption. Regina has a complex past, and in many fanfictions, Emma helps her on her path of redemption. For example, in some stories, Emma's belief in Regina's ability to change is a central plot point.
Friendship is another theme. They start as adversaries in the original story, so fanfictions often explore how they can become friends. This can involve them sharing secrets, protecting each other from threats in Storybrooke, and learning to trust one another.
One common theme is the characters' reactions to the pregnancy. How they deal with the unexpected news and how it changes their relationship. For example, they might start out as rivals and the pregnancy could bring them closer together.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions on various topics, including those related to Mal, Emma, and Regina. Just use the search function on the site and type in relevant keywords.
One common theme could be adventure. With a dragon involved, it's likely that the characters like Emma and Regina embark on some sort of journey. Maybe they are on a quest to save their land from a greater evil, and the dragon becomes an important part of that adventure.
One common theme is the power struggle. Since dragons often represent great power in these fanfictions, Emma and Regina may have to deal with who gets to control or use that power. Another theme is the discovery of self. For example, Emma might find out new things about herself through her connection with dragons.
One common theme is the struggle with their different personalities. Emma is often portrayed as more impulsive and Regina as more guarded, so their love story involves breaking down those barriers. For example, in many fanfictions, Emma has to find ways to get Regina to open up.
A common theme is family. It shows how Regina and Emma come together to form a family unit for the baby. Another theme could be sacrifice, as they might have to sacrifice some of their own wants or needs for the well - being of the baby.
One common theme is the exploration of their relationship during pregnancy. It could be about how they support each other, deal with the physical and emotional changes, and prepare for the arrival of the baby.
One common theme is the exploration of their complex relationship. It could be about how they overcome their differences. Another theme is the power dynamics between them. Often, they are both strong - willed characters, and the fanfiction might play with who has more influence at different times.