Hermione might become more guarded initially. Given her history with Draco, she would be cautious about opening up. But as the relationship progresses, she could become more empathetic towards Draco's situation. Draco, on the other hand, may start to shed some of his pure - blood arrogance. He might become more open - minded and less judgmental as he gets to know Hermione better.
Hermione's personality might become more open - minded. Initially, she has a very fixed view of Draco as a bully. But with the marriage contract, she has to see him in a different light. She might become more empathetic towards him. For Draco, he could become less arrogant. The forced proximity with Hermione makes him realize that his pure - blood supremacist views are not as valid as he thought. He starts to respect Hermione's Muggle - born status and even learn from her in some ways.
Their relationship would likely become more complex. They would have to consider each other in new ways. For instance, they'd have to make joint decisions about their living arrangements, finances in the wizarding world (like property in Diagon Alley or Hogwarts' resources they might inherit). Also, they'd need to be more emotionally open with each other. Before, they were just friends, but now they have a legal bond. There might be some awkwardness at first, but as time goes on, they could develop a deeper, more romantic connection.
One interesting plotline could be Draco and Hermione initially resisting the marriage law but gradually finding common ground. They might start by hating each other due to their past differences in Hogwarts. However, as they are forced to live together, they discover each other's hidden qualities. For example, Hermione could find that Draco has a soft side when it comes to his family, and Draco could come to admire Hermione's intelligence and determination.
Hermione's personality might change in that she would have to be more diplomatic. Instead of always speaking her mind bluntly as she usually does, she'd need to consider Draco's feelings and the situation of their arranged marriage. She could become more patient too. For Draco, he might become more self - reflective. Being married to Hermione, who is so different from him, would force him to look at his own prejudices. He could develop a more humble side as he realizes that Hermione has a lot to offer despite being a Muggle - born.
One possible fanfiction could be that the wizarding world enacts a new marriage law which somehow forces Harry and Hermione to consider marriage. They might initially be resistant as they've always seen each other as friends. But as they start to go through the motions of fulfilling the law's requirements, they discover new aspects of their relationship. They realize that they share a deeper bond than they thought, filled with mutual respect and understanding.
In this type of fanfiction, Harry can transform from a somewhat impulsive hero into a more calculating and thoughtful person. This is because he has to deal with Draco's Slytherin - like thinking. Draco, who was once a self - centered and sometimes cruel character, may grow into a more selfless individual. The marriage law forces them to be in close proximity, and they start to influence each other in positive ways. For instance, Harry might influence Draco to be more open - minded about Muggle - borns, and Draco might teach Harry how to better protect himself using Slytherin - inspired strategies.
Severus could become more accepting of change. Hermione, with her Muggle - born ideas and modern ways, would introduce new concepts to him. He may start to see the wizarding world in a different light. Hermione, on the other hand, might become more guarded. Being associated with Severus, who has a somewhat controversial past, she would have to deal with the stares and whispers, which could make her more cautious in her actions and words.
One possible plot twist could be that Snape initially resists the marriage law but then gradually falls in love with Hermione as they are forced to spend time together. He might start to see her in a new light, beyond just being a student. Another twist could be that Hermione uses her intelligence to find a loophole in the marriage law to get out of the marriage, but then realizes she actually has feelings for Snape and decides to stay.
One idea could be that they initially resist the marriage law but gradually find common ground in their love for knowledge. They start sharing potions recipes and Hermione teaches Severus about Muggle literature. Their relationship evolves from a forced union to a real, loving one as they discover each other's hidden depths.
Harry's personality can grow in terms of his emotional intelligence. Since Hermione is so perceptive, he learns from her how to better understand his own emotions and those of others. He becomes more empathetic. Hermione, in a marriage with Harry, might develop a stronger sense of adventure. She realizes that there's more to life than just books and research. They both influence each other in positive ways, making their personalities more well - rounded and adaptable to the challenges of married life.