One key moment could be in the potions class. Snape might be unfairly criticizing Hermione's potion - making skills, and she just refuses to take it silently and stands up to him, stating her case clearly. Another moment might be when Snape is being overly harsh on one of her friends, and Hermione steps in, protecting her friend and facing Snape's wrath head - on.
It often changes the perception of Snape among other characters. When Hermione stands up for him, some characters who previously disliked or distrusted Snape start to question their own views. For example, in a fanfic, after Hermione's defense, Ron might start to see Snape in a new light and be less hostile towards him.
A great fanfic could be where Hermione stands up for Snape when some other characters are gossiping about his past as a Death Eater. She might argue that people should be judged by their present actions and not be condemned forever for past mistakes. She could point out how Snape has risked his life countless times to protect the students at Hogwarts, like when he tried to keep the Death Eaters at bay during the school's attacks. This shows that Hermione recognizes his true worth and is not afraid to go against the popular opinion to defend him.
In this fanfiction, Hermione standing up to Snape might cause a rift in the Hogwarts faculty. Some teachers may side with Hermione, seeing Snape's meanness, while others might defend Snape. This could create chaos in the school and lead to a whole new set of adventures for Hermione and her friends as they navigate this new, more complex situation.
One popular 'Hermione stands up to Snape' fanfiction is 'The Courage of Hermione'. In it, Hermione defends Neville against Snape's unfair treatment in a really intense potions class scene. It shows her strong will and intelligence as she uses her knowledge of potions rules to counter Snape's scathing remarks.
Another plot point could be Hermione standing up for her friends. Like when Snape is being overly harsh on Harry or Ron. She steps in, not afraid of the consequences. This highlights her loyalty and her sense of justice. In some fanfictions, this might lead to a power struggle between Hermione and Snape, where she has to use her wits to avoid getting into too much trouble with the strict professor.
One common theme is justice. Fans often write about characters standing up to Snape to seek fairness, whether it's for themselves or other students. Another theme is courage. It takes a lot of guts to go against a strict and often intimidating teacher like Snape. And friendship also plays a role. Usually, the characters who stand up to Snape are supported by their friends, showing the strength of their bonds.
One common plotline is that Harry stands up to Snape over unfair treatment of his friends, like Hermione or Ron. Another could be about standing up for the rights of all students against Snape's sometimes harsh disciplinary actions. There might also be a plotline where Harry stands up in defense of his own magical abilities when Snape doubts him.
Another theme is loyalty. Ron's actions in these fanfictions display his loyalty to Hermione. He doesn't let others mistreat her and is ready to face any consequences to protect her.
Obviously, Hermione is one of the main characters as the title implies she is the one taking a stand. The Weasleys, as a family, are also main characters since she is standing up to them. Depending on the plot, Harry Potter could also be an important character, perhaps caught in the middle of the conflict between Hermione and the Weasleys.