She might say yes right away. Hermione has deep feelings for Harry as a friend, and those could easily turn into romantic feelings. She would see all the good in Harry and believe that they could have a great relationship together.
Well, it depends on the type of fanfiction. In some, Hermione might be overjoyed and immediately say yes. They could then become a power couple within Hogwarts, using their combined intelligence and skills to solve mysteries and protect the school. In other fanfictions, she might be hesitant at first, worried about how it would affect their friendship. But after some consideration, she could accept and they would have a very loving relationship.
She could say yes without hesitation. After all, Harry is a popular and brave figure. It would be an honor for her to go with him.
She might say yes. Since Harry is quite popular and charming in the wizarding world, Susan could be flattered and excited to go with him.
She might decline. Hermione is a very practical and goal - oriented person. She has her studies and her friends to think about. Going on a date with Snape, who has a rather complex and not - always - friendly reputation, might seem too risky and not in line with her plans. Also, she may not have any romantic feelings for him at all.
Hermione could be a bit hesitant. She's very practical and might worry about how it would affect their friendship or what others would think. But if Harry was sincere and persuasive, she'd likely come around. She might ask him a lot of questions about why he wants to go with her, and once satisfied with his answers, accept his invitation.
She could say yes. Maybe she's always secretly liked Harry and this is her chance to get to know him better.
They would probably become more affectionate. Holding hands while walking through the corridors of Hogwarts, stealing little kisses when no one is looking.
Another way it could develop is that it could create a rift among their friends. Some friends might support their relationship, while others, like those who have always shipped different pairings, could be against it. This could lead to some interesting plot twists and drama within the fanfiction story.
She would probably be very angry. Hermione is a strong - willed character. She might immediately try to break free from his grip and demand an explanation. For instance, she could shout at him, 'Professor Snape, what do you think you're doing? This is completely unacceptable!'
Harry decides to ask Ginny during a Quidditch match. After an exciting game, he finds Ginny on the pitch. He takes a deep breath and says, 'Ginny, you're the most wonderful person I know. Your skills on the broom are incredible, but it's your heart that really got me. I was wondering if you'd like to be my girlfriend?' Ginny is a bit shocked at first but then jumps into his arms, yelling 'Yes!' The whole team cheers for them.