Hermione is the daughter of Voldemort in fanfiction. How could this be possible in the context of the Harry Potter universe?

Well, in fanfiction, some authors might come up with the idea that there was some hidden connection or a secret affair in the past. Perhaps Voldemort had a relationship with Hermione's mother before he fully embraced the dark side. This would completely change the dynamics of Hermione's character and her place in the wizarding world. It could lead to her having to deal with the stigma of being related to the most evil wizard ever while still trying to uphold her values.

Well, in fanfiction, the author has the liberty to play with the lore. There could be a scenario where a powerful dark magic spell in the past had some unforeseen consequences. This spell could have somehow intertwined the bloodlines of Voldemort and Hermione's family. Maybe a curse was placed on a family that later branched out to both Voldemort and Hermione's ancestors, creating this strange connection.

Well, in fanfiction, the idea of Hermione being Voldemort's niece might stem from some sort of magical tampering with family lines in the past. It could be that a powerful spell was cast long ago that altered the relationships in a way that made Hermione related to Voldemort. Or it could be a completely different take on the lore where the wizarding world has a whole other layer of hidden family connections that JK Rowling didn't explore in the original series.

Well, in fanfiction, anything can be possible. Maybe it could be a result of some time - turning magic gone wrong. Or perhaps there was a secret relationship between Sirius and Hermione's mother that was never revealed in the original story. It's all about creative interpretations in fanfiction.

In fanfiction, anything can be possible. Maybe a powerful spell was cast that altered memories or blood relations. It could be part of a complex plot where Hermione was secretly switched at birth.

In fanfiction, this could be possible through some creative plot twists. Maybe there was a secret relationship between Severus and Hermione's mother that was hidden. It could also be a result of some magical interference or a prophecy that was misinterpreted at first. Another idea could be that Severus used some advanced magic to protect Hermione and in doing so, a special bond was formed that led to this unexpected 'father - daughter' relationship in the fanfic world.

Well, in a fanfic, anything can be made possible. Maybe it could be that Severus had a relationship in the past that was kept secret, and Hermione was the result. Magic could also be involved in hiding the truth all those years.

In fanfiction, anything can be possible. Maybe a time - travel or a powerful magic spell gone wrong could be used to create this strange relationship. For example, if there was a spell that messed with people's memories and lineages, it could make Hermione seem like Bellatrix's daughter.

In fanfiction, anything can be possible. Writers might create a scenario where time - traveling or some sort of magical alteration to the past occurred. Maybe a powerful spell was cast that changed the course of events so that Hermione could be born to James and Lily. However, it's a huge departure from the original story's timeline.

One possibility could be through a powerful and misfired spell. Maybe a spell that was intended for something else, like a transfiguration gone wrong during a complex magic experiment in Hogwarts. For example, if a spell was being tested to enhance learning abilities by temporarily taking on the mental characteristics of a top student, it could have accidentally caused a full physical and mental transformation into Hermione.