Well, in many fanfictions with this theme, it might be someone who was thought to be on the good side. For example, it could be a fellow student at Hogwarts who is influenced by power or dark magic in disguise. They might betray Hermione because they see her as a threat to their own plans or status. It could also be an authority figure who is secretly working for the wrong side and decides to sacrifice Hermione for their own gain.
In such a fanfiction, it could be a character who has been corrupted by the idea of the 'light' side's superiority. Maybe they believe that Hermione's actions or ideas are not in line with their view of what is right for the 'light'. So, they betray her in the name of the 'light' to uphold their own version of it. This could be a character who has a long - standing relationship with Hermione, like a classmate or a mentor - like figure, which makes the betrayal even more shocking.
It depends on the specific plot of the fanfiction. It could be a friend who turns against her due to jealousy, or perhaps a false ally within the so - called 'light' side who has ulterior motives.
In many fanfictions with such a plot, it could be a so - called friend who betrays Hermione perhaps out of jealousy. Maybe they are envious of Hermione's intelligence and popularity at Hogwarts, and for some self - serving reasons, they choose to betray her.
She might become more distrustful. After being betrayed, it's natural for her to have a hard time trusting others again.
Hermione could react by using her intelligence to expose Fleur's betrayal. She might start gathering evidence of what Fleur has done wrong and present it to their mutual friends or to an authority figure in the wizarding world.
In the world of fanfiction, this could be a very dark and interesting plot. It might be that Ron is influenced by some dark magic or some external force that makes him turn against his best friends. Maybe he's jealous of Harry's fame or feels overshadowed by Hermione's intelligence, leading to his betrayal.
It's popular because Hermione is a well - loved character. Seeing her in a situation where she's betrayed by everyone adds a lot of drama. It's a way to explore her character in a different light, showing her vulnerability and her ability to persevere.
Well, it might be a story filled with mystery and intrigue. The betrayal could be part of a larger conspiracy, and Hermione has to figure out the truth and seek justice for herself.
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.
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.
Another possibility is that Fleur, in a bid to gain more influence in the magical world, uses Hermione's research on some ancient magic without permission. When Hermione finds out, she realizes Fleur has been using her all along, and this is the ultimate betrayal. Hermione then has to find a way to expose Fleur's actions and clear her own name.
Voldemort himself could be the main antagonist in this scenario. He might offer Hermione something she desperately wants in exchange for her betrayal. Maybe he promises to spare her Muggle - born friends if she gives up the Order's plans and secrets. His powerful and intimidating presence could easily force Hermione into a difficult situation where she feels she has no choice but to betray.