A third idea is that Blaise and Hermione are chosen to represent Hogwarts in an inter - magical school competition. They have to train together and overcome their differences. As they face challenges in the competition, they realize their mutual respect and admiration for each other's skills, which gradually turns into a romantic relationship.
In a non - Hogwarts setting, like in a modern Muggle city, Blaise and Hermione's relationship might develop more slowly. They wouldn't have the immediate connection of being in the same magical school. Maybe they meet at a magical artifacts convention. Blaise would be there representing his pure - blood family's collection, and Hermione would be there out of her love for learning about magic in all forms. They start off as acquaintances, slowly becoming friends as they discuss different magical theories.
Well, a plot might involve a magical artifact. Hermione discovers it first, but Blaise, being possessive, wants to be the only one associated with it through Hermione. So he tries to control her access to it and the research around it. Or perhaps there's a magical competition, and Hermione is the star contestant. Blaise gets possessive, fearing she'll get too close to the other competitors, so he acts as her self - appointed protector throughout the event.
If there's a situation where Hermione is in danger, Blaise saves her. After that, he becomes extremely possessive, believing that he has a special claim over her life. He starts to interfere in her daily activities, like who she can talk to and where she can go. Hermione may resist at first but gradually find herself falling for his protective, albeit possessive, nature. For example, he might stop her from going on a dangerous magical adventure with Harry and Ron because he's so possessive of her safety.
Maybe Chiwetel Ejiofor. He has shown in his previous roles that he can play complex characters with a lot of emotional range. For this role, he could bring out the more ambiguous nature of Blaise Zabini's dad, whether he's a good guy or a bad guy or something in between.
One common theme is friendship. Since they are from different houses (Harry from Gryffindor and Blaise from Slytherin), exploring how they overcome the house rivalries to form a bond is often seen. Another theme is mystery. Blaise has an air of mystery about him in the original series, and fanfictions often expand on that, like exploring his family secrets. Also, self - discovery is a theme, as both characters grow and learn more about themselves through their interactions.
Often, they explore the contrast between Harry's more well - known and heroic persona and Blaise's rather mysterious and slytherin - like nature. Their relationship in these fanfictions is usually about finding common ground.
One possible fanfiction could be about Blaise Zabini's dad's mysterious past in the wizarding world and how it might intersect with Harry Potter's journey. Maybe his dad was involved in some secret magical society that Harry later discovers during his fight against Voldemort.
One great fem Harry Potter and Blaise Zabini fanfiction is 'The Unexpected Bond'. It shows a unique relationship developing between them in the Hogwarts setting. The author does a wonderful job of portraying fem Harry's character with newfound femininity while still maintaining her strong will.
One common theme is friendship across house boundaries. Since Blaise is from Slytherin and Harry from Gryffindor, many fanfics explore how they can be friends despite the traditional rivalries. Another theme is redemption. Blaise's family has a somewhat shady past in some fanfics, and his relationship with Harry can be a part of his path to redemption. Also, mystery often plays a role as the two characters might team up to solve a mystery at Hogwarts.