For Hermione, she would become more cautious and calculating. Dealing with Tom, who has the potential to be Voldemort, she has to be on her toes all the time. Her intelligence would be put to the ultimate test as she tries to outmaneuver him. She might also develop a sense of pity for the young Tom, seeing the circumstances that led him to become evil.
Hermione's character would likely become more confident and assertive. Traveling through time with Sirius, she would be exposed to different situations that require quick thinking and bold actions. For instance, she might have to stand up to powerful wizards in the past without the safety net of Hogwarts rules. Her knowledge would expand as she learns from different time periods, making her an even more formidable witch.
Hermione's character might develop a new sense of understanding towards those on the 'dark side'. Through her time - traveling experiences with Lucius, she could see that not all who seem bad are completely irredeemable. She may become more open - minded and less quick to judge based on a person's family or initial appearance.
Hermione would likely develop a greater understanding of the roots of the wizarding world's problems. She would have to adapt her modern - day beliefs and knowledge to the different time periods. For instance, in a time where pure - blood supremacy was more rampant, she'd have to be more diplomatic in how she presented her ideas of equality. Rodolphus, starting from a dark - aligned character, could either become more sympathetic to the light side or double down on his dark beliefs depending on his experiences during the time travel. If he witnesses the harm caused by the dark magic - based society, he might change.
Hermione would likely become more hardened and cynical. Having to be married to someone as dark as Tom Riddle would test her ideals. Tom Riddle, on the other hand, might start to have some small moments of hesitation or confusion as Hermione's positive traits start to seep into his consciousness.
A really cool fanfiction is 'Time - Traveling Hermione and Young Tom'. This one has Hermione traveling back in time to stop Tom Riddle from creating Horcruxes in the first place. The story is filled with Hermione's attempts to outwit Tom while also trying not to disrupt the timeline too much. It has some really great character development for both Hermione and Tom, making it a must - read for fans of this pairing.
I really like 'Hermione's Time - Twisted Encounter with Tom Riddle'. It shows Hermione's struggle as she travels back in time and meets a young Tom Riddle. She tries to understand what made him turn into the evil Voldemort. The author does a great job of building the tension between Hermione's good intentions and Tom's already budding dark tendencies. There's also 'The Time - Traveling Witch and the Dark Lord - to - Be' which has a unique take on how Hermione's presence in the past might change the future, especially in relation to Tom Riddle's development.
Another plot might involve Tom Riddle traveling to the future where Hermione exists. He could be intrigued by her magic, which is different from what he's used to. He might try to use her knowledge for his own gain in the past, but Hermione is too smart for him and outwits him at every turn. This creates a battle of wits across time.
Well, a very common theme is the power of knowledge. Hermione, with her vast knowledge from the future, tries to use it to either prevent Tom from turning evil or to solve problems in the past. There's also the theme of moral ambiguity. As she gets closer to Tom, Hermione has to question her own beliefs and whether it's right to interfere with the past. And the theme of time - travel paradoxes is also often present. For example, if she changes something about Tom, how will it affect the future she came from? This creates a lot of interesting plot twists and turns in the fanfictions.
One interesting time - travel fanfiction could be where Hermione goes back in time and tries to prevent Tom Riddle from becoming Voldemort. In this story, she might use her knowledge of magic and Hogwarts to try and change his path. Maybe she shows him kindness and the true value of friendship, which could potentially alter his dark future.
At first, fem Harry would probably be cautious around Tom. But as they journey through time, they'd learn more about each other. Tom might be intrigued by fem Harry's different perspective on magic, coming from a future time. As they visit different historical events related to magic, they could gradually form a friendship. They might even start to have feelings for each other, especially if they save each other's lives multiple times during their time travels.