Well, it could be part of a plot device in the fanfiction. Maybe the author wants to show Draco in a more caring and domestic role. By having him brush Harry's hair, it's a very intimate act that can symbolize a deeper emotional connection that goes beyond their usual Hogwarts interactions. It might also be used to shock readers who are used to their animosity in the original books.
In some fanfictions, Draco might brush Harry's hair as a sign of a newfound closeness or a different kind of relationship developing between them. It could be a moment of tenderness in a story where their traditional rivalry has transformed into something more affectionate.
Maybe Harry has seen a different side of Draco that others haven't. He could have realized that Draco was just a product of his upbringing and the difficult situation he was in.
In some fanfictions, it could be because Draco shows a different side of himself. Maybe he protects Harry from other threats secretly. For example, he might use his knowledge of the Slytherin world to keep Harry out of danger.
The girl might not brush her hair because she thinks it looks fine as it is. Maybe she's rebelling against societal expectations of grooming.
There could be a scene where Harry is sitting by the window in the Gryffindor common room, looking a bit down. Draco enters (maybe there's some new understanding between the houses). He sits beside Harry quietly and takes out a comb. Without a word, he starts to gently brush Harry's unruly hair. Harry is initially surprised but then relaxes as Draco's fingers work through his hair, and there's a sense of peace and a new bond forming between them.
In fanfictions, Draco may yell at Harry due to jealousy. Harry is often the center of attention and gets all the glory. Draco, who comes from a proud pure - blood family, might feel overshadowed and this could lead to him yelling in frustration.
One reason could be the complex relationship they have in the original series. Fanfic authors often expand on that. Maybe Draco realizes Harry's importance in the fight against the real evil, like Voldemort, and so he becomes protective. It also adds an interesting dynamic to the story, making it more appealing to readers who love exploring different character relationships.
Maybe it's because Draco has a complex relationship with Harry in the original story. The fanfiction allows him to explore different aspects of their relationship, like a deeper understanding or a different kind of friendship that wasn't fully shown in the canon. It gives him a chance to see their story from new perspectives.
Draco's hair, being blond, can symbolize his purity in the sense of his pure - blood lineage. It's like a mark of his family's status in the wizarding world. In many fanfictions, it stands for his pride. Just as he holds his head high, his hair is often described as something that is prominent and catches the eye, much like his own self - important attitude.
One possible reason could be extreme stress or trauma. In some fanfictions, Naruto might go through a really tough battle or face a great loss that drains him both physically and mentally. This could potentially cause his hair to turn white, similar to how people in real life can get premature grey hair from high stress.
Well, it depends on the specific fanfiction. Some fanfic writers like to play with power relationships and might write a scenario where Draco appears to 'own' Harry in a symbolic way. However, this is not based on the canon of the Harry Potter books at all. It's just the creativity of the fanfic authors running wild. There are also many other fanfictions where such a concept doesn't exist at all.