One possible secret could be about his past relationship with Lily Potter. Maybe he reveals how much Lily meant to him and the complex feelings he had towards her, which in turn influenced his actions throughout the series. Another secret could be related to certain spells or potions that he has discovered but kept hidden from others in the wizarding world.
Perhaps Snape tells Hermione about his true allegiances during different points in the wizarding war. He might disclose how he was actually working for Dumbledore all along, even when it seemed like he was on Voldemort's side. Or he could share secrets about the Death Eaters, like their hidden lairs or future plans that he was privy to.
Hermione would likely become more empathetic towards Snape. Knowing his secrets would make her see him in a new light, not just as the strict and often - disliked professor. She might start to understand the reasons behind his actions and his prickly attitude.
Hermione could share her insecurities with Snape. She might tell him about how she sometimes feels pressured to always be the smartest and the most knowledgeable. Also, she could reveal her fears regarding the safety of her friends during the wizarding wars.
One possible plot twist could be that Snape reveals a long - hidden connection between Hermione and his own past. Maybe he knew her parents in a way she never expected. Another could be that he shares a secret about the Dark Arts that Hermione uses to turn the tide in a major battle against Voldemort. For example, he might disclose a weakness in a powerful dark spell that only he knew because of his past as a Death Eater and double agent.
The relationship could become very complex. Hermione might feel burdened by the secrets. She has to keep them from her friends, which could cause strain. On the other hand, Snape might start to rely on Hermione more, seeing her as someone who can understand his motives. This new dynamic could create a lot of internal conflict for both of them, as they navigate between their old roles and the new relationship based on shared secrets.
The secrets could create a bond of trust between them. If Hermione shares her fears, Snape might offer his protection or advice. This would make their relationship more complex and deeper than just a student - teacher one in the fanfiction world.
It's hard to say who would be the clear winner. Hermione is intelligent and quick - witted, but Snape has years of experience and a great deal of magical knowledge. If it's a battle of words, Hermione might hold her own for a while, but Snape could use his authority to shut her down.
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.
The 'time - travel' trope is also quite common. For example, Hermione might go back in time and interact with a younger Snape, which can lead to all sorts of new storylines and character developments.
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.
Snape might be suspicious at first. He might think it's some sort of trick or part of a bigger plot. However, as he observes Hermione more closely and realizes the genuineness of her situation, his attitude could gradually change to one of reluctant assistance. He might even offer some words of wisdom, albeit in his typical sarcastic way, to help Hermione regain her strength.