Another theme is self - discovery. Through their relationship, both Harry and Fem Draco learn more about themselves. Harry might discover a different side of himself that he didn't know existed when he's with Fem Draco, and Fem Draco might find her true identity apart from what her family and house expected of her.
You can try looking on fanfiction platforms like Archive of Our Own (AO3). There are often a large number of Harry Potter - related fanfictions there, including ones with this specific theme. Just use the search function and type in relevant keywords like 'fem Harry', 'Draco', and 'pregnant'.
As lemon fanfiction involves inappropriate content, I can't discuss its characteristics in the context of that. But generally in regular fanfiction about Harry and fem Draco, a characteristic could be the exploration of their personalities in new ways. For example, how a female Draco might have different interactions with Harry compared to the male Draco in the original story.
Self - discovery is also a big theme. As fem characters, they may have different experiences in the wizarding world compared to their male counterparts. They might discover new things about themselves, their magic, and their place in society. And of course, there's the theme of friendship and loyalty. How do they support each other through the challenges in the wizarding world?
The theme of family also comes up. How their respective families, the Malfoys and the Potters, influence their relationship. In some fics, they have to overcome the prejudice of their families. Also, the idea of a new kind of friendship is there. Even if their relationship turns romantic, it often starts as a very strange and reluctant friendship which then blossoms into more. This shows that even the most unlikely people can form deep connections.
Another good one is 'When Harry Met Fem Draco'. This story presents a scenario where Harry and Fem Draco meet under unusual circumstances. It's full of interesting dialogues and the author does a great job of building a believable relationship between them, all while staying true to the general feel of the Harry Potter world.
In some fanfictions, it could develop due to a common enemy. Maybe there's a new dark force emerging in Hogwarts, and they both realize that they need to put aside their differences to face it. This shared goal makes them rely on each other more, and feelings start to grow as they see the other's courage and determination. Their relationship could grow from a begrudging alliance to a full - fledged romance as they discover new sides of each other.
The 'fish - out - of - water' trope can also be present. For example, if fem Harry is the one pregnant, she might struggle with the physical and emotional changes in a world that is still male - dominated in many ways. And Draco might be out of his element in dealing with a pregnant Harry, especially if it goes against his family's expectations. There could also be a 'found family' trope as they navigate this new situation together and form a new kind of family unit.
It might be because the idea of two characters from opposing sides falling in love is very appealing. It creates a lot of interesting conflict and tension in the story.
Good 'Harry Potter and Fem Draco fanfiction' usually has well - developed characters. Since it's a twist on the original, the female Draco should be a fully - fledged character with her own motives, fears, and dreams. For example, she might have a different approach to magic or relationships compared to the male Draco in the original books.