When Hermione turns into a vampire, her magic could take on a darker tint. Not in the sense of being evil, but more in terms of its appearance. Maybe her spells now have a red or purple glow instead of the usual blue or white. Also, her ability to perform blood - related magic could be magnified. Since vampires are associated with blood, she could use her own vampiric essence to fuel spells that involve life force or healing, but in a different way than traditional magic.
Well, it's possible that her magic becomes more attuned to male - dominated magical fields. If in her normal form she was great at academic magic, as a boy she might find she has a natural affinity for combat magic. She could discover that she can learn certain spells quicker, like the more aggressive hexes and jinxes. This change in her magic could also lead to her having different magical relationships. For instance, she might attract the attention of male magical creatures that were previously indifferent to her, and they could offer her new forms of magical knowledge or assistance.
She could become more solitary. As a vampire, she might feel like an outcast, different from her friends. This could make her withdraw from social interactions she used to enjoy.
Well, her communication changes a great deal. As a cat, she can't speak in the normal way. So, in some fanfictions, she has to find new ways to express herself. This could be through body language or by leading her friends to things she wants them to see. Also, her relationship with danger might change. She might be more cautious as a cat, or she could be bolder because she has new cat - like abilities to rely on. In some stories, she also becomes more attuned to the natural magic around Hogwarts in her cat form, which is an interesting development of her character.
At first, Harry and Ron might be a bit freaked out. But Harry, being more open - minded, would quickly try to understand. Ron, on the other hand, might take some time to get used to it. Eventually, they would realize that Hermione is still Hermione, and they would support her in finding a way to change back if she wanted to. Their friendship would be tested, but ultimately become stronger as they face this strange situation together.
In fanfiction, the vampire side of Severus can make their relationship more intense. It can introduce a forbidden - love - like quality. Hermione is a rule - following Gryffindor, and being involved with a vampire goes against many norms. This creates a lot of internal and external conflict. Their relationship is no longer just about their personalities but also about this huge, vampiric secret. And it often leads to some really exciting plot twists as they try to keep their relationship hidden or find a way to make it work in a world that may not accept it.
Well, Hermione's magic is very powerful. In the Vampire Diaries world, it could be a huge game - changer. Her spells could potentially be used to protect against vampires, or maybe even control them to some extent. For example, she could use a spell to create a barrier that vampires can't cross. This would make her a very important figure in the Mystic Falls drama.
The story changes a lot. For one, Elena's place in the supernatural world shifts. She goes from being a target of vampires to being one of them. This means she's now part of the 'in - crowd' in a way. Her daily routine would be completely different. Instead of going to school during the day, she'd be prowling at night. And her relationships with the other characters would be redefined. Stefan and Damon would have to see her in a new light, and she might start to have a different understanding of Klaus too, not just as a threat but as someone who has given her a new kind of life.
If Karin Maaka turns into a true vampire, her relationships with her human friends would likely change drastically. They might be afraid of her new vampire nature, especially if they see her display vampire traits like super strength or a thirst for blood. Her family might also be in shock and try to find a way to 'cure' her. However, she might form new relationships with other vampires who understand what she's going through and can guide her in the vampire world.
In terms of her relationships with other Hogwarts students, some might be afraid of her and avoid her. But others, who are more open - minded, could be intrigued. For example, students from other houses might be curious about her half - vampire abilities and want to befriend her. Hermione would have to deal with a lot of mixed reactions, which would change the dynamic of her social life at Hogwarts. She might end up being closer to some students she didn't expect and more distant from those she thought were her friends.
It changes the power dynamics. In the original, Mina was more of a victim and a tool for the heroes to fight Dracula. But in this fanfiction, she becomes part of the 'dark side'. It also adds a new layer of complexity to Dracula's character. He's not just a villain out to terrorize people, but he has a more personal connection with Mina. And it might change the ending. Instead of Dracula being defeated, there could be a scenario where Mina and Dracula rule together in some sort of vampiric realm.