Well, the family backstory could be that Draco's mother, Narcissa, had a sister who fell in love with a Muggle - born wizard. They had a child, which was Hermione. But due to some family drama, Narcissa took Hermione in and raised her as her own, making Draco her older brother. This would explain Hermione's intelligence as she might have inherited some traits from her biological parents. It would also create a lot of tension within the family as they deal with the implications of having a Muggle - born in a supposedly pure - blood family, and how Draco would handle this situation with his Slytherin friends and the rest of the wizarding community.
Perhaps their family was part of a secret society that was against the pure - blood mania in the wizarding world. Their parents were trying to promote equality and as a result, their family was targeted. This backstory would give Hermione and Theo a common cause and a strong family bond based on their family's ideals.
Perhaps their family had a connection to some ancient magic that Hermione discovers as she grows up. Their family could have been involved in some secret magical society that was passed down through generations. James might have been more interested in the adventurous side of it, while Hermione delved deeper into the knowledge and history of this society. It could also be that they had a family member who was a great seer, and this gift was passed down in a diluted form to Hermione, giving her her intuition and intelligence.
They could have a really complex relationship. Draco would be protective yet also have his Slytherin pride. Harry might look up to Draco in some ways, like for his knowledge of the wizarding world. But they could also have their disagreements, especially when it comes to things like blood purity. However, at the end of the day, the brotherly bond would still be there.
Well, it would completely change their relationship. For one, Draco might be more protective of Hermione. He might not be as mean to her as he was in the original story. He could use his Slytherin influence to shield her from some of the nastier Slytherins. Instead of the constant bickering, they could have a more brother - sisterly bond where they secretly look out for each other. For example, Draco could help Hermione with some of the pure - blood politics she doesn't understand while Hermione could help Draco with his studies.
First, his character could start off as a bit of an enigma. Maybe he has been away from Hermione for a while, and when he returns, he realizes how much she needs protection. As the story progresses, he could show his protective side more and more. He might be a strong wizard, but also have a soft heart, especially when it comes to Hermione. He could be developed as someone who is well - respected in the wizarding community for his own achievements, and uses that status to shield Hermione. For instance, if she's wrongly accused of something, he uses his influence to clear her name. He could also have a bit of a temper when it comes to those who threaten Hermione, which adds an interesting dimension to his character.
One possibility could be that in this fanfiction, there is a lot of initial awkwardness. Hermione, being Ron's friend, might have some pre - conceived notions about his older brother. Maybe she's intimidated at first because she's used to Ron, and the older brother seems more mature or different in some way.
Yes, there are some out there. You can start by looking on fanfiction websites like Archive of Our Own or Fanfiction.net. Just search for the exact phrase 'Harry is Hermione's older brother' in their search bars and you'll likely find a variety of stories with different plotlines and interpretations.
The Malfoy family would have to accept Harry as part of their family, which would be a huge shock. Lucius Malfoy would likely be very resistant as Harry represents everything he hates about the wizarding world. Narcissa, on the other hand, might be more open - minded. For Harry, he would have to deal with the pure - blood elitism of the Malfoy family. And Draco would have to adjust to having a half - blood brother, which goes against the pure - blood values he was raised with.
One interesting fanfiction could be 'The Malfoy Heir'. In this story, Draco's older brother is portrayed as a complex character who has to deal with the family's expectations in a different way than Draco. He often tries to protect Draco from the harsher aspects of their family's dark reputation. It shows a different side of the Malfoy family dynamics that we don't often see in the original series.
Another theme is redemption. The older brother may be seen as a character who has the potential to redeem the Malfoy name. He could be involved in good deeds that counteract the family's association with the Dark Arts. This can involve helping out other Hogwarts students or working against Voldemort's regime in a discreet way. It's a way of showing that not all Malfoys have to be on the side of evil.