Yes, there are likely some fanfics out there with such a plot. Fanfic writers often explore alternate storylines, and this would be a very dark and dramatic deviation from the original Naruto story.
Without more details, Kenny could be anyone. He might be the protagonist of the story, a person with his own motives and desires. Maybe he's a young man who gets involved in a mystery and the secret is central to his journey. It's also possible that he's a more complex character with a backstory that led him to the point of abandoning this secret.
Well, in some fanfictions, Hermione might use her superior intellect. She could outwit the Death Eaters by setting up elaborate magical traps. For example, she could use transfiguration magic to create objects that suddenly turn into something dangerous when the Death Eaters approach. Another way could be through her extensive knowledge of potions. She might create a potion that incapacitates or kills them when they come into contact with it.
Yes, it can be a popular concept in the Harry Potter fanfiction world. Many fans enjoy seeing the hero, Harry Potter, take decisive action against the villains, the Death Eaters. It gives a sense of ultimate victory and justice.
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.
The redemption arc of some Death Eaters can also be a plot device. In some fanfictions, Harry tries to save some of the Death Eaters who he believes can be redeemed. This adds a layer of complexity to the story as he has to balance his desire for revenge with his moral compass. He may end up sparing some Death Eaters who then help him in his fight against the more hardcore ones.
In a 'Harry kills all Death Eaters' fanfiction, the plot could start with Harry getting fed up with the constant threat the Death Eaters pose. He could go on a solo mission to hunt them down one by one. Along the way, he might face some moral dilemmas as he realizes that some Death Eaters might have families or could potentially be redeemed. But in the end, he decides that the only way to ensure peace is to eliminate them all. This could lead to a series of intense battles in different wizarding locations, and Harry could gain new allies or use some unexpected magical artifacts to achieve his goal.
There are likely fanfictions with that concept. However, it's important to note that the Harry Potter series already has a complex narrative where not all Death Eaters are simply killed off by Harry. Fanfictions exploring this idea might deviate significantly from the original plot. Some might be well - written with interesting character developments and new magical elements added to make such a scenario possible. Others could be more simplistic in their approach. You really have to dig through the vast sea of fanfictions to find the ones that suit your taste.
Draco might be extremely frightened. He could become more cautious around Harry, always looking over his shoulder. For example, he might avoid being alone in the same room with Harry, fearing a repeat of the incident.
He might face a lot of scrutiny from the wizarding world. Some might see him as a hero, but others could be afraid of his new - found power. So, he would have to deal with political issues within the Ministry of Magic.