Minerva would likely first remove Hermione from the immediate dangerous situation. She might take Hermione to her own quarters in Hogwarts, which would be a safe place. For example, she could give Hermione a warm bed to sleep in and some food, providing her with basic necessities and a sense of security.
Well, in some versions, Minerva might notice Hermione's withdrawn behavior in class. For example, she could see that Hermione is no longer as eager to answer questions or participate as she used to be. This change in her normal enthusiastic self could be a sign that something is wrong at home or in her personal life, leading Minerva to suspect abuse.
Well, perhaps he uses his influence in the wizarding world. Maybe he has some connections or knowledge that allows him to intervene and get Hermione out of the abusive situation. For example, he could use his status among the pure - blood families to put pressure on the abusers.
One plot idea could be that a group of Slytherins overhear some Gryffindors making cruel remarks about Hermione that border on abuse. Outraged, they step in and form a sort of protective alliance around her. They use their Slytherin cunning to outwit those who are being mean, for example, by tricking them into revealing their true nasty selves in front of the whole school. Another plot could involve a Slytherin who has secretly admired Hermione's intelligence for a long time. When he or she witnesses the abuse, they gather other like - minded Slytherins and start a campaign to change the perception of Hermione in the school. They might start by inviting her to study groups in the Slytherin common room, which is initially met with resistance but gradually changes the minds of many.
Sasuke may simply give Karin a cold stare. His cold and unyielding gaze can be enough to make Karin think twice about approaching Sakura. It's a non - violent way of showing his determination to protect Sakura.
In fanfiction, Hermione and Minerva could have a wonderful friendship. Hermione's thirst for knowledge would mesh well with Minerva's vast wisdom. They might often be found in the library together, discussing ancient spells or the latest magical theories. Their friendship could also be a source of support during difficult times at Hogwarts, like when the school is under threat.
In some fanfictions, Flitwick might take the action of training students in advanced magic. He is a skilled wizard, after all. He could be teaching spells that are not typically covered in regular classes, like some rare defensive charms or complex transfiguration spells.
Well, in some fanfictions, Snape might use his powerful magic skills secretly. He could cast a spell to deflect Bellatrix's attack aimed at Hermione just in time. For example, he might use a Protego spell in a very sneaky way that Bellatrix doesn't notice until it's too late.
He could use his position of authority. Snape might confront the abuser directly. Since he's a teacher, he has the power to intimidate and put a stop to any immediate harm. He could also give Hermione a safe place to stay, like his own quarters (if it's within the rules of the fanfiction world).
Draco Malfoy could be one of the main Slytherin characters. Despite his past differences with Hermione, he might have a change of heart when he witnesses the abuse. He could use his family's influence to stop it. Another could be Pansy Parkinson. She may initially be reluctant, but as she sees the injustice, she steps in. Maybe she uses her sharp tongue to put the abusers in their place.
Another way is that Ron could call upon the help of his friends or allies. He might send a Patronus to summon other Gryffindors or even some Hogwarts professors. Together, they overpower Viktor and rescue Hermione. Ron's leadership skills and ability to rally support could be crucial in this situation.