At first, the modern girl might think it's all a dream. But when she realizes it's real, she'll likely be in shock. She'll have to deal with the fact that there are wizards, spells, and a very real threat in the form of Voldemort. She may start to explore the world she's in, trying to find a way back home. Along the way, she could end up getting involved in the fight against Voldemort, either by accident or because she feels it's the right thing to do. She might use her modern thinking skills to come up with unique solutions to problems in the wizarding world, like using her knowledge of human psychology to outwit Voldemort's minions.
She'd probably be terrified at first. I mean, Voldemort is one of the most feared villains in the wizarding world. But then she might start to think about how to survive. She could try to hide and observe the world around her to figure out what's going on.
She could be very confused. The world of Voldemort fanfiction is full of magic and dark forces that she may not be used to. However, if she's a brave girl, she might decide to take action. She could try to find the good wizards and witches in the fanfic and ask for their help. She might also try to learn some magic quickly to defend herself. For instance, she could learn a simple shielding charm or a disarming spell.
At the beginning, it would be difficult for her to fit in. But she could use her modern skills in reading and writing to her advantage. Maybe she could start a school for the children in Camelot, teaching them not only basic literacy but also about different lands and cultures from her world. In terms of social norms, she would have to learn to adapt while also subtly introducing her own values. For example, she could show kindness and respect to all classes of people, which might gradually change the way people in Camelot interact with each other.
She might find herself in a very dangerous and dark world. Maybe she'll have to use her modern knowledge to outwit Voldemort's followers. For example, if she knows some self - defense techniques from the modern world, she could use them against the Death Eaters.
She would likely adapt by first learning the languages. Since Middle - earth has various languages like Sindarin and Khuzdul. Then she would have to get used to the different cultures and social norms. For example, the strict hierarchies in some of the kingdoms.
She'd have a tough time at first. The lack of modern conveniences like electricity and running water would be a shock. But she might adapt by using her knowledge of history to figure out how to get by. For example, learning to sew clothes in the Camelot way or helping with the farming using basic agricultural knowledge.
She would be terrified at first, but quickly gather her wits. Hermione is very intelligent, so she would likely start observing her surroundings, looking for any possible means of escape or a way to send a signal to her friends.
There would be a great deal of shock and confusion. Many would start to question everything they had believed in. Families would be divided. Some might think that Harry had been corrupted by Voldemort's dark magic and try to find a way to reverse it. The Ministry of Magic would be in a panic. They would try to come up with new strategies to deal with this new threat. Teachers at Hogwarts would be worried about the safety of their students. And the Death Eaters, while initially happy to have Harry on their side, would also be suspicious of his motives and loyalty.
He'd probably be furious. Voldemort has a huge ego and most fanfiction would likely not portray him in the way he sees himself. He might view it as a form of disrespect to his 'true' nature and power.
Harry would probably be in a state of shock and disbelief at first. He'd be filled with a mix of fear, confusion and anger. Voldemort might be initially dismissive or see it as an opportunity to further his own dark plans. Hermione would be practical, trying to find solutions in books and magic. Ron would be more likely to be openly disgusted at first but might come around to support Harry as a friend.
Harry might immediately gather his friends and share the contents of the Howler with them. He values their input and they've always been there to support him. Together, they would analyze the message and come up with a plan. Maybe he'd be a bit angry too, feeling that Voldemort is always trying to disrupt his life and the safety of those around him.
Her life would change drastically. She'd go from living an ordinary life to being in a world full of superhumans and extraordinary events. She might have to adapt to new rules and powers that exist in the DC Universe.