Another idea for a fanfiction could be that Lucius Malfoy's sister discovers a long - lost magical ability that is different from the typical dark magic her family dabbles in. She then tries to use this ability for good, while her family tries to force her to use it for their own dark purposes.
In some fanfictions, Draco Malfoy might be involved too. As Lucius Malfoy's son, he could interact with his aunt in various ways. For example, she could be a mentor to him, guiding him away from the dark path his father has set him on. Or perhaps he could be suspicious of her actions if she starts to go against the family's traditional values.
One interesting fanfiction could be where Lucius Malfoy's little sister is a rebel in the pure - blood society. She might secretly befriend Muggle - borns and try to change the views within her family. It could show her struggles between loyalty to her family's ideals and her own sense of right and wrong.
Well, if Hermione was Lucius Malfoy's sister in fanfiction, it would completely turn the story upside down. First, Hermione's loyalty to the Gryffindor values would be in a huge conflict with her Malfoy family ties. She might be pressured to side with the Death Eaters or at least be more sympathetic to their cause which she would resist. Second, her relationship with Harry and Ron would be strained. They might not trust her as easily, thinking she could be a spy for the Malfoys. And third, it would change her entire backstory. Instead of being a Muggle - born witch, there would have to be some sort of complex family history to explain her connection to the pure - blood Malfoy family.
One common theme is family loyalty. In a lot of fanfictions, we see Draco and Lucius sticking together through thick and thin, no matter what the situation is in the wizarding world.
One reason could be for the greater good of the wizarding world. If Lucius is healed, he might be able to turn away from the Dark side and provide useful information about Voldemort's remaining followers.
Many 'Harry Potter Lucius Malfoy Mpreg Fanfiction' stories also explore his relationships in a new light. His relationship with his family, especially Narcissa, could be strained or strengthened. And his relationship with other Death Eaters or Hogwarts faculty might change as they react to his unexpected condition.
Well, in some fanfictions, Harry might use his advanced magic skills he learned from Dumbledore's old books. Maybe he discovers a long - forgotten spell that can reverse the dark magic effects on Lucius.
In fanfiction, it might be due to a redemption arc for Lucius. He realizes the error of his ways in the wizarding war and starts to view Hermione, a muggle - born with great talent, as someone worthy of protection. He could also be protecting her from other dark wizards who might want to harm her because of her intelligence and influence among the light - sided wizards. This protection could also be a form of self - atonement for his past misdeeds against the muggle - borns.
One great Lucius Malfoy and OC fanfiction is 'The Malfoy Heir'. It has a really interesting plot where the OC is a powerful witch who gets intertwined with Lucius's family secrets. Another one is 'In the Shadows of Malfoy Manor' which delves deep into the relationship between Lucius and the OC against the backdrop of the wizarding world's politics.