Well, if Hermione were Grindelwald's granddaughter in a fanfiction, it could completely change the power dynamics. Hermione's intelligence might be seen as a legacy from Grindelwald. Maybe she would have some hidden, dark magical abilities that she has to struggle with. This could also put her in a difficult position with her friends, especially Harry and Ron, as they've been fighting against Grindelwald's ideology. It would add a whole new layer of conflict and self - discovery for Hermione.
If Hermione was Grindelwald's granddaughter in fanfiction, it would mean she has a really complex family history. This could lead to her being ostracized by some in the wizarding world who still fear Grindelwald's name. However, it could also give her a unique perspective on magic and its uses. She might be more tempted to explore the gray areas of magic, which would be a departure from her usual strict moral code. And it could lead to some really interesting plot twists where she has to choose between her family's past and her present friends and values.
Well, it could be about her trying to redeem the family name. Maybe she discovers the truth about Grindelwald's actions and decides to use her magic in a positive way, like helping the wizarding community heal from the past traumas caused by her grandfather.
If Hermione was Dumbledore's granddaughter in fanfiction, it would likely make her an even more important figure at Hogwarts. The teachers might treat her differently, perhaps with more respect or higher expectations. And she could have a different role in the Order of the Phoenix too, being related to Dumbledore. She might be given more dangerous or important tasks.
She'd probably be shocked. Hermione has always been on the side of good, and finding out she has such a dark family connection would be a huge blow. She might initially deny it or try to find evidence that it's a mistake.
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.
His relationships with the other characters are also altered. Dumbledore, for example, had a big role in Harry's life in the original story. But if Harry is Grindelwald's son, Dumbledore's attitude towards him might be more complex. Dumbledore had a history with Grindelwald, and this new connection could make Dumbledore both more protective and more wary of Harry. The same goes for other characters like Snape. Their interactions with Harry would be colored by this new family connection.
She might start off as a bit of an outcast. With her family name, she would be shunned by some. But as she experiences kindness from others, she could start to become more confident and less ashamed of her heritage. For example, if she meets a kind teacher at Hogwarts who encourages her to be her own person.
It could change her appearance, making her look more mature. For instance, she might have to adjust her clothing style to fit her taller frame.
It would change a great deal. First off, McGonagall would probably be more involved in Hermione's academic progress on a personal level. She might give her special assignments or extra tutoring. As for the other professors, they might view Hermione as having an 'inside track'. For instance, Professor Flitwick could be more lenient with her in Charms class. This new dynamic would add a whole new layer to Hermione's Hogwarts experience and how she interacts with the faculty.
It would completely transform the story. Hermione being Lily's twin would mean that the Marauders might have interacted with Hermione as well. Sirius and Remus might have seen her as an additional person to protect. And Hermione's presence could have potentially led to different outcomes in the events leading up to James and Lily's death. She might have been able to come up with a different plan to hide from Voldemort, using her vast knowledge of magic.
Well, it could change a great deal. For one, Hermione might have more access to inside knowledge about Hogwarts. McGonagall could be more protective of her, which might lead to different situations where Hermione is involved. For example, in dangerous situations, McGonagall might be more likely to step in directly to protect Hermione, rather than just as a teacher protecting a student.