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.
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.
It's not entirely unethical. Fanfic is a form of creative expression. If the writer is using the 'Hermione tortured' concept to make a point about the character's growth, like how she overcomes such a traumatic experience, it can be seen as valid. But if it's just for shock value or to be mean - spirited towards the character, then it's not so ethical.
There's also 'The Enigma of Bellatrix and Hermione'. This fanfic delves deep into their interactions. It shows how Hermione might be able to outwit Bellatrix in some situations while also being in a world of danger. The author does an excellent job of creating a tense atmosphere throughout the story.
One great Hermione Bellatrix fanfic is 'The Unlikely Bond'. It delves into a scenario where they are forced to work together in a complex magical situation. It's really interesting to see how their different personalities clash and also find common ground. Another one is 'Bellatrix's Redemption Through Hermione' which shows a rather unique take on Bellatrix's character development influenced by Hermione.
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.