In some fanfics, Hermione might dye her hair as a form of self - discovery. She's growing up and trying to figure out who she is outside of just being the smart girl. Changing her appearance, like dyeing her hair, could be a step in that journey of self - exploration.
It could be related to a specific event in the fanfic. For example, if she's going undercover for some mission, changing her hair color might be part of her disguise. Also, perhaps she's influenced by someone she admires and decides to copy their hair color.
She might choose blue. Blue is often associated with intelligence and mystery, which suits Hermione well. It would be a bold yet still somewhat sophisticated choice for her.
One possible reason could be a symbol of a new beginning. Maybe she's had a major life change, like starting a new chapter in her relationship or in her studies at Hogwarts. It could also be a sign of rebellion against the traditional image others have of her. In some fanfictions, she might cut her hair to fit in with a different group or to show that she's breaking free from her old self.
Maybe he just wants a new look. Naruto is always known for his wild and adventurous spirit, so dyeing his hair red could be a way to show his rebellious side or simply to stand out more.
Well, there could be a fanfiction where Bella dyes her hair purple by accident. Maybe she was trying to use a natural hair treatment but something went wrong with the ingredients. Her friends are initially shocked but then they start to love her new look. This new hair color also catches the eye of a certain character who previously hadn't noticed her much, and it sets off a whole new series of events in the story.
One possible reason could be the long - standing rivalry between Gryffindor and Slytherin. Hermione, being a Gryffindor, has always seen Draco as an adversary. So, in a fanfic situation where they are brought together in some way, her past experiences and prejudices might make her scared. For example, Draco has taunted her and her friends many times before.
One possible reason could be a misunderstanding. Maybe her friends thought she was following but she got distracted by something, like a new spell she saw in an old book. So they unknowingly left her behind.
One possible reason could be envy. Maybe Fleur sees Hermione's intelligence and skills and feels threatened. So she becomes possessive to try and keep Hermione in a certain place or relationship where she can control her influence. Another reason might be that Fleur has some deep - seated insecurities. Hermione is well - liked and respected in the wizarding world, and Fleur, perhaps unconsciously, wants to claim Hermione as 'hers' to boost her own status. It could also be a case of misinterpreting friendship for something more possessive. If they are friends in the fanfic, Fleur might not know how to handle her strong feelings for Hermione in a healthy way and ends up being possessive.
One reason could be a religious conversion. For example, in some religions, shaving the head is a symbol of new beginnings or a sign of piety. Another reason might be for a role in a play or a movie. If the character requires a shaved head look, the actor or actress with long hair would have to shave it. Also, it could be a personal bet or a dare. People sometimes make wild bets and shaving the head could be the consequence.
Perhaps it's because the fanfiction offers a different perspective on the Death Eaters. It might show their motives or backstories in a new light that Hermione, being the inquisitive person she is, finds fascinating.
One reason could be for a disguise. Maybe she's on the run from some bad guys in the fanfiction world and changing her hair color helps her blend in better.