The Order of the Phoenix would see Harry's joining of the Death Eaters as a major setback. They would likely view it as a sign that Voldemort has become even more powerful. Dumbledore, if he were still alive, would be very concerned and would try to understand what led Harry to this decision. He would also be devising a plan to get Harry out of the clutches of the Death Eaters.
In a Death Eaters' child fan fiction, the child could be a complex character. Maybe they were raised in the Death Eater ideology but then met a kind-hearted wizard from Hogwarts who made them question everything. This encounter could lead to a journey of self - discovery where they have to choose between loyalty to their family and doing what's right.
Definitely. Some fanfictions depict Harry Potter's attempts to infiltrate the Death Eater ranks or gather intelligence on them. This creates exciting storylines that revolve around mystery, danger, and the fight between good and evil in the Harry Potter universe, all while keeping the content suitable for a wide range of readers.
The Hogwarts students would be divided. Some would be in disbelief and would still hope that Harry has a good reason for joining. They might secretly support him. Others, especially those who have lost family members to the Death Eaters, would be furious and see Harry as a traitor. Harry's old enemies at Hogwarts, like Draco Malfoy, would also be confused. Draco might initially think that Harry has finally seen the 'right' side, but as he realizes Harry's true intentions (if they are good), he would be conflicted as well since he's been brought up in a Death Eater - influenced family.
The wizarding world would be in shock. Harry was seen as the 'Chosen One' to defeat Voldemort. If he joined the Death Eaters, the Order of the Phoenix would feel betrayed. They might try to rescue him or think he's been an undercover agent all along. Hogwarts would be in chaos, and students would be confused and scared.
A possible motive could be self - preservation. If they believe that Voldemort's downfall is inevitable and that by saving Harry, they can gain some form of leniency from the side that opposes Voldemort. They might think that Harry has enough influence to spare their lives if they help him.
Voldemort himself, of course, is the most prominent in a sense. But in the fanfiction, his relationship with the other Death Eaters could be different. He might be more distrustful or have different expectations of them. And then there's Barty Crouch Jr. He could be a major player in the fanfiction, with his skills in disguise and dark magic. His actions could drive some of the major plotlines in the fanfiction.
One great fanfiction is 'The Battle Against the Dark'. In this story, Harry Potter uses some unique spells he learned from an old wizard to combat the Death Eaters. The fight scenes are really intense and it shows Harry's growth as a wizard. It also has some interesting plot twists that keep you hooked.
One common theme is the struggle between good and evil. Harry represents good, and the Death Eaters are the face of evil. Fanfictions often explore how Harry overcomes the dark magic and malicious intents of the Death Eaters. Another theme is redemption. Some stories might show a Death Eater having a change of heart due to Harry's influence.
I'm not sure there are specific 'squinting Death Eaters' that are widely known as such in fanfiction. However, some Death Eaters like Bellatrix Lestrange are often featured in fanfictions. If there were a squinting one, perhaps it could be a new character created by a fanfiction author who becomes popular for their unique take on a Death Eater.