The fact that her hair is in a bun might also play a role. It could be a cultural or traditional style in the fictional world she belongs to. When she's kidnapped, her captors might be disrespectful of this style, which angers her and gives her the motivation to resist. The bun could also be used practically during her captivity. For example, she might hide small objects in it to help her escape, like a lock pick or a small note.
Such a description might be used to make the character stand out in a fanfiction. He could be a unique character in a fantasy - based fanfic too. For example, he could be a wizard who has adapted to some modern - day human habits like wearing a hair tie on his wrist. His bun could be a way to keep his long hair out of his face while he's performing magic.
It could be a symbol of a particular phase in their life. Maybe when they were younger and more carefree, and now at 40, it represents a connection to that lost youth.
It could be Luna. Luna is known for her unique and often unexpected gifts. She might give Harry a hair tie that has some special meaning, like it was made from a rare magical plant.
If it's a hair tie given to her by a friend, it could strengthen their bond. For instance, if it was from Angela, it would be a symbol of their friendship. Whenever Bella looks at it, she's reminded of their good times together, and it might make her more likely to reach out to Angela when she's having a problem, thus deepening their relationship.
Well, it could be a symbol of a new side of his personality. Maybe it shows his growing up and becoming more aware of his appearance. It might also be a gift from someone special, like Hermione or Ginny, which would add a touch of sentiment to it.
The hair tie could symbolize her growth from a more carefree state to a more responsible one. In the beginning, it might have been just a normal hair tie she wore casually. But as she faces the challenges in the Twilight world, it becomes a reminder of how she has to be more in control. For instance, if she starts off as a young girl who is just part of the normal human world in Forks, and then gets involved with the werewolves, the hair tie can show how she adapts. She might start wearing it tighter on her wrist as she takes on more responsibilities within the pack, like helping to keep the peace between the members.
In hair fanfiction, a black hair tie on the wrist can symbolize a connection to a particular character. It might be something that the character left behind or a memento. For example, if it was from a love interest, it could represent an unspoken bond or a longing for that person.
In fanfiction, a girl with a dirty hair tie on her wrist could be a sign of her being in a hurry or perhaps she's been through some sort of adventure. Maybe she was so caught up in an event that she didn't have time to clean up or change her hair tie. It could also be a unique characteristic given to her by the author to make her stand out. For example, in a fantasy fanfiction, it might be a charm that has some special power but just looks like a dirty hair tie.
The black hair tie on the wrist can be a part of a character's transformation. Suppose a shy character decides to take off the hair tie from their wrist and tie their hair up, signifying a newfound confidence and a change in their attitude towards a situation in the fanfiction.