Often, there's the theme of secrecy and discovery. Because their relationship and the resulting child are so unexpected, they usually have to keep it a secret at first. And then there's the process of how others in the wizarding world discover this situation. Also, the theme of acceptance is prevalent. Their families and friends have to come to terms with this relationship that goes against what was expected.
One popular 'Hermione has Draco's child' fanfiction is 'A Different Future'. It explores how the wizarding world reacts to this unexpected union and the challenges their child faces in a world still divided by old grudges.
Lyra, as the product of Hermione and Draco in fanfiction, can have a really interesting story arc. One possibility is that she discovers a new form of magic that neither of her parents were aware of. This new magic could be a way to bring the wizarding world together in a time of great unrest. She could also have a group of friends who are misfits like her, and together they go on adventures around Hogwarts and beyond, facing challenges that test her loyalty to both her Gryffindor and Slytherin sides.
In a future fanfiction where Draco and Hermione have a child, the story could explore the challenges of their child growing up in a wizarding world still divided by old prejudices. The child might struggle with being a product of two former rival houses. It could also show how Draco and Hermione's relationship evolved over time, from enemies to lovers, and how they are now co - parenting. Maybe the child discovers a new form of magic that could bridge the gap between Slytherin and Gryffindor once and for all.
The other Gryffindors would likely be divided. Some would be outraged, thinking that Hermione has betrayed the house by getting involved with a Slytherin, especially Draco Malfoy. However, others might be more understanding and see that love can cross house boundaries. In Slytherin, Draco's friends would also have mixed reactions. Some would be proud that Draco has managed to get Hermione pregnant, seeing it as a sort of conquest, while others might worry about the implications for their standing in the wizarding world.
The child would likely inherit Draco's sense of pride, but in a more positive way. Instead of being prideful about pure - blood status like Draco was in his youth, it could be pride in their family's unique combination of backgrounds. From Hermione, the child would probably get a thirst for knowledge and a strong sense of justice. So, the child might be someone who stands up for what's right, especially when it comes to issues of equality in the wizarding world.
Perhaps their child would be a key figure in bringing about more positive relations between the wizarding world and the Muggle world. Given Hermione's Muggle - born background and Draco's pure - blood status, the child could use their unique position to advocate for better understanding and cooperation. They might even start a new organization at Hogwarts dedicated to this cause, which would be an exciting plot point in the fanfiction.
One popular type of Draco and Hermione fanfic involving a child might explore an alternate universe where they have a child together. It could be a story about how they navigate parenting in a world where their relationship was unexpected. For example, they might face challenges from their respective pure - blood and Muggle - born backgrounds in raising their child with the right values in the wizarding world.
One plot idea could be that their child has to navigate the complex social divide between the former Gryffindor and Slytherin groups at Hogwarts. Another could be the discovery of unique magical abilities that are a blend of Hermione's studious and powerful magic and Draco's pure - blood heritage magic. Maybe the child is caught in the middle of a new threat to the wizarding world and has to use both sides of their family's knowledge and influence to save the day.
Lyra may possess a strong sense of justice, which she gets from Hermione's Gryffindor side. However, she may also have a certain elegance and poise, similar to Draco. In social situations, she could be very observant, a skill she inherits from both parents. She may use this to her advantage, whether it's in the classroom or in dealing with the complex politics of the wizarding world. Also, she might be a bit of a loner at first, trying to figure out her place in a world that doesn't quite understand her unique heritage.