It might not seem like much, but the hair tie could be a conversation starter. Maybe one of the Avengers comments on it, and it leads to a more in - depth conversation, strengthening their bond. For example, Thor could be curious about this strange 'band' on her wrist, and Darcy's explanation could make him see her in a new light.
On the other hand, some of the more serious Avengers might initially see it as a sign of frivolity. However, as they get to know Darcy better, they realize it's just part of her practical nature. This realization could be a turning point in their relationship. For instance, Captain America might at first think it's just a girlish accessory, but when he sees how useful it can be, he starts to appreciate Darcy more for her ability to find utility in simple things.
Well, it could be a simple fashion statement. Maybe Darcy just likes to have a hair tie handy in case she needs to quickly put her hair up, like if she's in the middle of some Avengers - related chaos and doesn't want her hair in her face. It could also be a gift from someone, perhaps a fellow Avenger or a friend, which would add a bit of sentiment to it.
One idea could be that Darcy, being an Avengers fan, always wears a hair tie on her wrist as a sort of good - luck charm. In the fanfiction, she could be an intern at Stark Industries and one day, while wearing that hair tie, she accidentally stumbles upon a secret project of the Avengers. Maybe it's a new type of weapon or a device that could potentially change the fate of the world. This discovery then thrusts her into the middle of an Avengers - related adventure where she has to use her wits and the 'lucky' hair tie (which could end up having some hidden significance) to help the Avengers save the day.
It could be a symbol of a prophecy. In the fanfiction world, there could be an ancient prophecy that mentions a 'band of power on the wrist of a true believer'. Darcy, being an Avengers fan, is the true believer. When the Avengers face a seemingly unbeatable enemy, they start to notice that Darcy's hair tie on her wrist has some strange powers. It glows when danger is near or gives off a force field. This makes the hair tie a central plot device as they figure out how to use its powers to defeat the enemy.
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.
In the Avengers fanfiction, Darcy without her glasses could have a complex effect on her relationships with the other Avengers. For those like Bruce Banner, he might empathize with her as someone who also has some vulnerabilities. They could form a deeper connection based on mutual understanding. Meanwhile, Clint Barton might tease her about it at first but then help her out in his own way. And Thor, if he's in the story, might see it as a sign that he needs to be even more of a protector for her. This lack of glasses could either strengthen or strain her relationships with the Avengers depending on how they all react to the situation.
She might be more clumsy around the other Avengers without her glasses. For example, she could accidentally bump into Captain America while he's in the middle of giving a serious speech, causing an awkward moment but also some light - heartedness.
The hair tie on her wrist might be a catalyst for her character development. If other characters notice it and make comments, it could make her more self - aware. She might start to think about how she presents herself and what the hair tie says about her. This self - awareness could lead to her making different choices in the story, like getting involved in more dangerous situations or being more cautious, depending on how she wants to be perceived.
In an Avengers fanfiction, Darcy's suinting glasses might be a key plot device. For instance, they could be a gift from a mysterious figure that has some special powers. She might initially not know the full potential of the glasses but gradually discovers that they can help her communicate with other dimensions or something really cool like that.
In a fanfiction, the girl with the hair tie on her wrist is on a solo hike. She uses the hair tie to mark the trees along the way so she can find her way back. But then she gets lost. As she tries to retrace her steps, she realizes that the hair tie is not just a simple accessory but a reminder of her own strength and she manages to find her way back to the main trail.
A fanfiction could revolve around a mom with a black hair tie on her wrist who is a superhero in disguise. The hair tie is actually a magical object that gives her powers when she ties her hair back. She has to keep it a secret from her family while still saving the day in the neighborhood.