If Hermione adopts Tom Riddle, it could potentially prevent the rise of Voldemort. This would mean a much more peaceful wizarding world. There would be no First or Second Wizarding Wars, and countless lives would be saved. Families like the Potters and the Weasleys would not have to endure the pain and loss they suffered in the original timeline.
It could also change the way magic is taught. Hermione, with her experience in teaching Tom, might introduce new methods of magical education. For example, she could emphasize the importance of ethics and morality in magic from an early age. This could lead to a new generation of wizards and witches who are more responsible and less likely to use magic for dark purposes.
It would change the future of the wizarding world a great deal. Hermione is a smart and kind - hearted witch. With her as Tom's mother figure, she would likely encourage his academic pursuits in a positive way. He might grow up to be a great wizard who uses his powers for good instead of evil, thus changing the whole power dynamic in the wizarding world.
The wizarding world would be in shock at first. But over time, if Fem Harry is successful in raising Tom right, it could lead to a more peaceful future. There might be less fear and prejudice as Tom doesn't become Voldemort.
Hermione would likely approach Tom's dark past with a great deal of research. She'd probably dig into the history of Voldemort's early years to understand what led him down that path in the first place. By knowing the root causes, she could try to prevent the same things from happening to Tom. For example, if she found out that loneliness and a sense of being an outcast were factors, she'd make sure Tom had a strong support system at Hogwarts.
Well, in fanfiction, anything can be possible. It could be possible through some dark magic or a complex time - travel plot. Maybe a spell went wrong and created a connection between Hermione and Tom Riddle that led to her being his daughter. However, in the original "Harry Potter" lore, it's completely against the nature of good and evil as Hermione is on the side of good and Tom Riddle is the evil Lord Voldemort.
The story could also involve Hermione using her magical knowledge to help Tom control his powers. Since Tom is a powerful wizard from a young age, he might have difficulty handling his magic properly. Hermione, being a brilliant witch, could guide him. This could lead to a unique bond between them, where Tom respects Hermione for her abilities and Hermione sees the potential for good in Tom.
The wizarding community would be horrified. Hermione is seen as a hero, and Tom Riddle Jr. is the most feared dark wizard. It would be a scandal that would rock the community to its core.
It can make her more involved with the pureblood families. She might have to attend more pureblood - related events, which could be both good and bad. Good because she gets to understand them better, but bad as some might still be prejudiced against her.
Snape's character could become more calculating and cold - hearted. Tom Riddle is not exactly a nurturing figure, and being raised by him would expose Snape to a world of power - seeking and self - interest. Snape may lose some of his capacity for love and affection that he had for Lily in the original story. He would be more focused on achieving power and status within Riddle's regime. His relationships with other characters would be more transactional. For instance, he would not form the same kind of complex relationship with Narcissa Malfoy as he did in the original story because his priorities would be different, being centered around Riddle's goals rather than his own personal loyalties and emotions.
Their friendship could change the perception of dark magic. Tom, having been on the path to becoming Voldemort, might have a different view on dark magic with Harry as his friend. They could work on redefining what is considered dark magic and find ways to use some of those spells in a more positive or controlled way. This could revolutionize the study of magic at Hogwarts and in the wizarding world in general.
One possible plot twist could be that Tom Riddle's dark tendencies start to resurface despite Hermione's positive influence. Maybe he begins to secretly manipulate those around him at Hogwarts while still maintaining a facade of being a reformed child. This could lead to a rift between Hermione and some of her friends who suspect Tom but don't understand why Hermione is so trusting.