Hermione's character arc would be significantly altered. Firstly, she would have to come to terms with a new family member from a different house and background. This would require her to be more open - minded and less judgmental. Her relationship with knowledge might also change as she delves into her family history with Marcus. She might be more interested in the secrets and spells that are associated with their family. Additionally, her role in the wizarding community could shift. Instead of just being known as a Gryffindor and a friend of Harry Potter, she would also be Marcus' sister. This could bring new responsibilities and expectations, such as representing her family in certain wizarding events or disputes. It would be a complex and interesting transformation for her character.
As a ghost, Hermione might become more detached from the physical world. She could be less focused on grades and more on the spiritual aspects of Hogwarts. Her patience might also increase as she now has a different perspective on time.
Hermione would probably develop a stronger sense of responsibility towards the people of England. In the wizarding world, she was mainly concerned with the rights of house - elves and her friends. But as a princess, she has a whole kingdom to look after. This could make her more cautious in her actions. She might also become more aware of her appearance and how she presents herself, as she is now a public figure representing the monarchy. But she would still be the same Hermione at heart, always ready to fight for what she believes is right.
It would make her more complex. Usually, Hermione is very rational and follows the rules. But having a crush on Dolohov, a known antagonist, would make her question her own judgment. She might become more secretive as she doesn't want her friends to know about her feelings. This is a big change from her usually open - minded self when it comes to sharing her thoughts and feelings with Harry and Ron.
If Hermione was adopted by the Cullens, her character would likely become more attuned to the vampire world's values. She might be more secretive like the Cullens, as they hide their true nature. Her studious nature could be redirected towards understanding vampire lore. For example, instead of poring over Hogwarts textbooks, she'd be delving into books about vampire history and abilities. This new family dynamic would also make her more cautious in her interactions, knowing the potential danger her new family could face if exposed.
She might become more sophisticated in a French way. The French are often associated with elegance and a certain refined charm. Hermione could pick up some of these traits, perhaps in her speech or mannerisms. For example, she might start using more French phrases in her conversations.
Hermione would likely become more powerful in a different way. Instead of just relying on her book - learning and magic spells, she would have an innate power from Hades. This could make her a bit more intimidating. However, she would also be more empathetic towards creatures and beings that are misunderstood, like those in the underworld. Her sense of justice would still be strong, but it might be applied in a different context, such as dealing with the rules and power dynamics in the underworld.
Well, her character would likely become more guarded. Snape is not one for open displays of affection or warmth, so Hermione might learn to hide her emotions more. However, she would also be exposed to Snape's vast knowledge of potions and the Dark Arts in a more intimate way. This could make her more of an enigma to her friends. She might start to question some of the Gryffindor values she once held dear, as Snape would surely instill in her a different set of beliefs, at least to some extent.
Hermione might become more protective. If her twin is in any sort of danger or facing difficulties, she would step up more. For instance, if the twin gets bullied for being different, Hermione would use her wits and knowledge to stand up for them.
Hermione would likely become more conflicted. Her usual confidence and surety in her beliefs would be shaken. She might become more withdrawn as she struggles with the implications of her new identity. She may also start to show more signs of ruthlessness, a trait associated with Voldemort. For example, she could be less hesitant to use extreme measures to achieve her goals.
If Hermione were Regulus's sister in fanfiction, it would likely lead to a different kind of relationship with Sirius. Instead of just being friends with Harry who is related to Sirius, she would have her own family connection. This could also mean that she might have some knowledge about the family's dark past that Sirius didn't share with her in the original story, which could be used to her advantage in various situations.