It could be Bellatrix Lestrange. She was one of Voldemort's most loyal followers and was quite obsessed with him. It's not hard to imagine in a fanfiction world that she might have had some sort of relationship with Voldemort that led to the birth of a baby.
One possibility could be that the baby is a result of some dark magic experiment. Maybe Voldemort created the baby as a new vessel for his soul, more powerful than his previous Horcruxes. The story could then revolve around the baby growing up under the influence of Voldemort's followers, who see it as the future of the Dark Lord's reign.
It's possible. Fanfiction communities are full of creative and often boundary - pushing ideas. While the idea of Hermione and Voldemort having a baby is extremely non - traditional given the nature of their characters in the official 'Harry Potter' story, in the realm of fanfiction, where authors like to experiment with different scenarios, such a concept could exist. Some fanfictions might explore this idea to see how it could change the whole 'Harry Potter' universe, or perhaps just for the novelty of it.
Such a fanfiction would likely be full of drama. Hermione would probably be in a state of turmoil, trying to come to terms with having a baby with Voldemort. The baby might possess unique magical abilities that are a combination of Hermione's cleverness and Voldemort's dark magic. The story could also explore how the wizarding world reacts to this unexpected union and the baby that results from it. It would be a very different take on the 'Harry Potter' universe, and would require a lot of creative world - building to make it somewhat believable within the context of the magical world.
In the realm of fanfiction, the ethics can be a bit murky. Writing about such a scenario as 'Voldemort makes Hermione have a baby' can be ethical if it is done in a way that respects the original source material and the values it represents. For instance, if it is used to show the horror of Voldemort's actions and Hermione's strength in the face of such evil. But if it involves vulgarity, excessive violence, or goes against the core values of the Harry Potter series like love, friendship, and the fight against evil in an inappropriate way, then it is unethical.
The theme of forbidden love also appears. Given that Voldemort is the ultimate evil and Hermione is on the side of good, a relationship between them is highly taboo. Fanfictions often play with this idea, showing how they might be attracted to each other despite their opposing natures. This can lead to a lot of internal conflict for both characters as they struggle with their feelings in the context of their respective moral standings.
In 'Harry Potter Lord Voldemort fanfiction', the theme of manipulation is quite common. Voldemort is a master manipulator in the books, and fanfictions show how he manipulates others to do his bidding. The theme of prophecy also appears often. Since the prophecy about him and Harry was important in the original series, fanfictions may play around with different prophecies related to Voldemort. And the theme of fear is there too. Voldemort instills fear, and fanfictions might explore how that fear affects the wizarding world in different ways.
Well, in some Bella and Lord Voldemort fanfictions, the focus could be on their backstories and how they came to be so loyal to each other. Maybe it delves into Bella's early life and how she was drawn to Voldemort's ideology. It could also show Voldemort's perspective on Bella, perhaps seeing her as more than just a follower but as someone with unique abilities that could be useful in his grand plan. There might be a fanfiction where Voldemort decides to train Bella in some ancient and dark magic, which then changes their relationship in unexpected ways.
One common theme is the struggle between good and evil within the child. Since the parents are on opposite sides of the moral spectrum, the baby is likely to have an internal battle. Another theme is acceptance. How the wizarding world accepts or rejects this strange union and the child. And also, the theme of power, as the child might inherit powerful magic from both parents.
In many such fanfictions, there could be a lot of different scenarios. One possibility is that the wizarding world would be in chaos. Dumbledore might lead a frantic search for baby Harry. Maybe some of the Order of the Phoenix members would try to infiltrate Voldemort's lair to rescue him. It could also be that Voldemort has some strange plan for Harry, like trying to turn him to the dark side from a very young age.