Their relationship might start off with Lucius acting more like a shadowy protector. Hermione doesn't know who is helping her at first. Once she discovers it's Lucius, she is shocked. But as time passes, Lucius starts to explain his reasons. Maybe he tells her about his regrets regarding his past actions. They could start to bond over shared interests in magic and books. Lucius might introduce Hermione to some ancient and powerful magic that she can use to protect herself further, and this could strengthen their relationship as they become more like teacher and student in some ways, while also being protector and protected.
At first, Lucius might be shocked by Hermione's flirting. He's used to a certain type of pure - blooded behavior, and Hermione, as a Muggle - born, is completely different. But as she continues to flirt, he could become intrigued. He might start to see her in a new light, not just as a Mudblood but as an intelligent and alluring witch.
Their relationship might start with a lot of hostility. Hermione, with her strong sense of justice, would be very wary of Lucius, who has a history of being on the wrong side. But as they interact more, Lucius could be intrigued by Hermione's intelligence and courage. He might start to change his ways to impress her, and Hermione could see the potential for good in him.
Well, it might start off very coldly. Lucius would be reluctant to accept help from a mudblood like Hermione in his eyes. But Hermione, being persistent, would keep pushing to help him. As she starts to break down his walls, Lucius might find himself drawn to her in a strange way. Maybe he starts to see her as a powerful ally rather than an inferior. And Hermione might start to understand the pressures that made Lucius the way he was before. This could lead to a relationship that has elements of mutual understanding, respect, and perhaps even a bit of attraction as they both discover new sides of each other during their time together.
Their relationship could develop in a rather complex way. Given their very different backgrounds, there would be a lot of clashes. However, the marriage law forces them to coexist. As time passes, they might find common ground in their love for the wizarding world, albeit from different perspectives. Hermione could introduce Lucius to the idea of a more inclusive wizarding society, and Lucius could teach Hermione about the long - standing pure - blood traditions that have some value, if reformed. This mutual exchange could lead to a grudging respect and eventually something more like friendship or even love.
For Lucius, his development could be a slow process. At first, he resents being around Hermione, but as he witnesses her magic and her kind heart, he starts to question his own values. He may begin to see the error of his ways regarding blood purity. Hermione might develop more patience. Dealing with Lucius, who has such different views, makes her learn to tolerate and try to change someone rather than just oppose them.
Their relationship might develop through a series of intellectual debates. Hermione is known for her sharp mind, and Lucius is no fool either. They could start arguing about topics like blood purity and the rights of different magical beings. These debates could lead to a grudging respect for each other's viewpoints, and from there, a more positive relationship could start to form.
In fanfiction, the relationship between Hermione and Lucius can be quite complex. Some fanfictions might explore a scenario where they are enemies forced to work together due to certain circumstances in the wizarding world. For example, they could be paired in a mission to save Hogwarts from a new dark threat. Their different backgrounds, Hermione being a Muggle - born Gryffindor and Lucius a pure - blood Slytherin, would create a lot of tension and interesting character dynamics.
Lucius could have a change of heart due to Hermione's bravery. When he witnesses her standing up to the dark forces fearlessly, he might be reminded of the qualities he once admired in the wizarding world before getting involved with the dark side. So he decides to protect her to preserve that bit of goodness.
In the fanfiction, Fleur could use her Veela charm in a positive way to create a sense of mystery and allure for Hermione. But instead of it being a controlling charm, it could be something that just makes Hermione curious about Fleur. Fleur could then take Hermione on adventures, like exploring hidden magical places. As they have these experiences together, their relationship would grow. Fleur could also be vulnerable with Hermione, sharing her insecurities, which would make Hermione see her as more than just a beautiful Veela but as a real person she can connect with.
Their relationship could start off very tentatively. Snape would be his usual gruff self, but Hermione would notice his small acts of help. As time goes on, she might start to trust him more and they could develop a sort of mentor - mentee relationship, with Snape passing on some of his more esoteric knowledge of magic to Hermione.