Hermione could become withdrawn. She might isolate herself from her friends for a while, spending her time in the library trying to make sense of it all. She might also feel a sense of betrayal, especially if they had some sort of understanding or relationship developing.
Hermione could also try to move on quickly. She is a rational person, and she might tell herself that Draco leaving is for the best. But deep down, she still has feelings for him. So she would struggle between trying to forget and constantly thinking about him.
One possible reason for Draco leaving pregnant Hermione in fanfiction could be due to the long - standing enmity between their houses in the wizarding world. Maybe Draco is afraid of the social and family implications of being associated with a Gryffindor, especially when she's pregnant. He might also be pressured by his pure - blood family values which initially made him view Hermione as an outsider.
She might be initially shocked. After all, Draco is usually seen as this tough Slytherin. But then she could feel sympathy. For instance, she might offer him a handkerchief without saying much at first.
She might be heartbroken at first. Hermione is someone who invests deeply in her relationships. She would likely retreat into her studies as a way to cope, burying herself in books to try and forget the pain.
At first, Hermione would be shocked. But then, she would quickly compose herself. She could play along with Draco and Blaise for a while, pretending to be compliant while she actually gathers information about their motives and the place where they are holding her. She might also try to turn them against each other by highlighting their differences in goals or personalities. Given her intelligence, she would surely come up with a clever plan to get out of the situation.
Hermione is a strong - willed character. At first, she might be in denial about the situation. But as time passes, she likely becomes determined to raise the child on her own. She draws on her inner strength, which she has shown throughout the Harry Potter series in facing difficult challenges.
It can make Hermione seem more rebellious. In canon, she's with Ron, so in this fanfiction scenario, her leaving Ron for Draco shows that she's willing to break away from the expected and follow her own heart, even if it means going against her friends' expectations.
Hermione might be shocked at first. She has always seen Draco as an adversary, so a neck kiss from him would be completely unexpected. She could push him away immediately and demand an explanation.
Hermione could also be more understanding in some fanfictions. If she senses that there's something deeper behind Draco's actions, she might try to calm the situation down. She could ask him why he did it instead of immediately retaliating. Maybe she sees a glimmer of vulnerability in his eyes and decides to approach the situation in a more empathetic way. This could then lead to a conversation that changes their relationship for the better.
Hermione might initially be shocked and afraid, but she would quickly gather her wits. She would assess Draco, trying to figure out if there was any way to sway him to her side. Given her ability to see the good in people, she might try to appeal to any sense of morality Draco has left, all while secretly planning her escape or a way to undermine Voldemort's plan of using her as a pawn against the good side.
Hermione might initially be furious. She is a strong - willed character, so being tied up against her will would surely make her angry. She would probably start using her wits right away, trying to figure out a way to free herself, whether it's through magic or by tricking Draco.