It depends on how the author writes it. If it's very graphic and violent, it might not be suitable for younger readers. But some authors can handle the dark theme in a more tasteful and less disturbing way.
Hermione herself could be more vigilant. If she noticed any signs of danger or people acting strangely around her, she could take precautions. She could use her own intelligence and magic to create defenses. For instance, she could set up a spell that alerts her when someone with malicious intent is near, and then she could either escape or fight back.
Maybe introduce a deus ex machina element. For instance, just when it seems the torture is getting too much, a powerful magical creature appears and scares Bellatrix away. This would lighten the mood a bit and prevent the story from going into extremely dark territory. Also, the author could play with the idea of Hermione having some sort of pre - prepared magical protection that lessens the impact of the torture.
One possible motive could be jealousy. Bellatrix is extremely loyal to Voldemort, and Hermione is a very powerful and intelligent witch from the side opposing Voldemort. Bellatrix might see Hermione as a threat and also be jealous of the attention Hermione gets from Harry and Ron. So, she tortures Hermione to try and break her spirit and prove her own superiority.
Well, it can have a huge impact. It often adds a great deal of darkness and tension. It might change the way other characters view the situation in the story. For example, it could make Harry and Ron more determined to fight against the Death Eaters. It also shows the brutality of the bad guys, in this case Bellatrix, and makes the readers feel more sympathy for Hermione. This event can be a turning point in the fic, leading to different character developments and plot twists.
Well, Bellatrix is a very complex and cruel character. In the fanfiction context, she might torture Draco to assert her dominance. She is a powerful and deranged Death Eater, and by torturing Draco, she can show that she is in control. Also, it could be related to her pure - blood mania. If she thinks Draco is not living up to the pure - blood standards in some way, she may take it upon herself to 'correct' him through torture.
The Death Eaters could be likely villains. They are known for their cruel and dark ways in the Harry Potter universe. They might target Hermione because of her association with Harry Potter, who is their sworn enemy. They could see torturing Hermione as a way to get to Harry or to send a message to the Order of the Phoenix.
Sure. There could be. For example, in some fanfictions, the 'torture' might be more of an emotional or mental kind. Bellatrix could use her intimidating presence and cruel words to torment Draco. This type of story can be interesting as it delves into the complex family dynamics within the Death Eater world. It can show how Draco tries to cope with such a difficult situation, perhaps by seeking help from unexpected allies like some of the Hogwarts students who oppose the Death Eaters.
One implication is the change in the characters' relationships. For example, Hermione's friends like Harry and Ron would have to deal with her having a Death Eater as a sister. It would also mean that Hermione might have some internal conflict, as she is a good witch and Bellatrix is a very dark character. This could create a lot of drama in the fanfiction story.