She might gain some vampire - like abilities such as enhanced strength, speed, and senses. For example, she could be able to run faster than normal wizards and have better night vision.
Well, it could lead to her being ostracized by some in the wizarding community. People might fear her new werewolf nature, just like they did with Lupin. This could make her feel isolated and struggle with her identity. She might also have to learn to control her newfound instincts, which would be a huge challenge.
One possible consequence could be her transformation into a werewolf. In many werewolf lore within the Harry Potter universe, a bite from a werewolf like Fenrir Greyback often leads to lycanthropy. This would mean that Hermione would have to deal with the monthly transformations, and she would likely face discrimination from some in the wizarding world who are prejudiced against werewolves.
In some fanfictions, she could be ostracized by the wizarding community due to the fear of her new condition. This could lead to her feeling isolated and having to fight for acceptance. Also, it might change her relationships with her friends. For example, Ron might be more overprotective while Harry could be more determined to find a cure for her.
She could face legal issues in the wizarding world. Killing is not taken lightly, even if it's Death Eaters she's killing. There might be a trial to determine if her actions were justified. If the wizarding authorities are corrupt or influenced by the wrong people, she could even be wrongly convicted.
She might become more distrustful. After being betrayed, it's natural for her to question the motives of those around her, even her closest friends.
Hermione might seek revenge. Given her intelligence and magical abilities, she could use her skills to get back at Harry and Ron for their betrayal. This could lead to a big rift in their friendship and even endanger their common goals in the wizarding world. She might also side with other characters who are against Harry and Ron, changing the whole dynamic of the story.
In the 'umbridge punishes hermione fanfiction', it's possible that Umbridge would publicly humiliate Hermione. Given Umbridge's character, she might call Hermione out in front of the whole class or school, making false accusations about her. This would not only damage Hermione's reputation but also cause her a great deal of emotional distress. Hermione, being a proud and intelligent witch, would likely be deeply affected by such public shaming, but she would also probably find ways to resist Umbridge's tyranny in her own clever ways.
Often, the story will focus on Hermione's struggle to come to terms with her new identity. She may try to find a cure at first. For instance, she might search through ancient magic texts in the library at Hogwarts.
She might become more distrustful. After being betrayed, it's natural for her to have a hard time trusting others again.
She could face isolation within the Hogwarts community. The students might gossip about her newfound relationship with Lucius. Hermione may also become more involved in the darker aspects of the wizarding world if Lucius leads her that way. Her academic focus could shift as she gets caught up in the drama of this new relationship. Moreover, she may end up regretting leaving Draco if she later realizes that Lucius was just using her, and this could lead to a lot of emotional turmoil for her.