Well, in some fanfictions, Snape might use his advanced potions knowledge. He could brew a special healing potion for Hermione. Maybe it's a modified version of a known potion, like the Essence of Murtlap that has strong healing properties.
One reason could be Snape's sense of duty. As a teacher at Hogwarts, he has a responsibility to look after the students, even if they attack him. So, he would put aside his personal feelings and help Hermione.
Well, Snape could use his strict teaching style in a positive way. He might push Hermione out of her comfort zone. By giving her tough tasks related to her fears, like facing a certain dark magic creature. And as she accomplishes these tasks, her fears gradually disappear. Also, his presence alone, with his reputation for being powerful, could make Hermione feel safer and more able to confront her fears.
She could be afraid of failing in her studies. Given Hermione's high - achieving nature, the fear of not being the best or making a mistake in her academic pursuits is likely. Another possibility is the fear of dark magic, especially considering the dangerous situations she often gets into at Hogwarts.
One possible reason could be a misunderstanding. Maybe Hermione thought Snape was involved in some dark plot against her friends. In the wizarding world, there are often secrets and deceptions, and if she got some false information, it could lead her to take such drastic action.
One common theme is the breaking of barriers. Snape and Hermione start with a lot of animosity, so when he helps her, it's about breaking down those initial negative feelings.
Well, in some fanfictions, Hermione might use her vast knowledge of magic. She could research rare spells or potions to heal whatever ails Snape. Maybe she discovers a way to reverse the effects of a dark curse that was placed on him. For example, if the curse is sapping his strength, she might find an ancient counter - curse in the library that requires precise incantations and rare ingredients. She would then gather those ingredients, perform the spell, and slowly help Snape regain his health and vitality.
Dumbledore might come to Snape's aid. Dumbledore always had a somewhat complex relationship with Snape, and he would likely step in to prevent things from getting too out of hand. He could use his powerful magic to stop Hermione and then try to sort out the situation calmly.
You can start by looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own (AO3). On these platforms, you can simply use the search bar and type in 'Hermione helps Snape' to see a list of relevant fanfictions.
Maybe Hermione has lost her confidence in her magical abilities due to some traumatic event. Snape, in his own gruff way, decides to mentor her. He helps her recover by guiding her through difficult spells and magical concepts she had previously mastered but forgotten. This journey of recovery could also involve them exploring parts of Hogwarts that are little - known, and in the process, they form an unlikely friendship.