She might be involved in tasks like researching ancient magic. Dumbledore, being very knowledgeable, could send Hermione to dig into old books and scrolls in the library to find information about a particular dark magic threat or a powerful spell that could be used for good. For example, if there's a new dark wizard on the rise, he might ask Hermione to look for any historical records of how similar threats were dealt with in the past.
She becomes more confident in her decision - making. Following Dumbledore's orders, she often has to make quick and important choices. This forces her to trust her instincts more, which in turn makes her more self - assured. For instance, when she has to decide whether to enter a dangerous area to retrieve an important item for Dumbledore, she learns to weigh the risks and benefits on her own and act accordingly.
Hermione's character could develop by becoming more confident in her own instincts. Following Dumbledore, she may start to trust her own judgment more as she observes his actions. For instance, if she disagrees with one of his decisions, she might be more assertive in voicing her opinion, which is a growth from her more deferential nature in the original books.
One possible plot twist could be that Hermione discovers a hidden side of Dumbledore. Maybe she finds out about a secret mission he was on long ago that has consequences in the present. For example, she could stumble upon a hidden prophecy related to Dumbledore that changes the way she views him and the entire wizarding world's future.
It could be about a military family where the husband, who is in a position of authority, gives an order to his wife to shave for some practical reasons like preparing for a difficult situation where hygiene and simplicity matter. For example, they might be about to go on a long journey in a military - style operation and shaving would make it easier to maintain cleanliness.
Fanfic that bashes characters can be quite controversial. However, some might be found on certain niche fanfic websites. But I must say that bashing characters like Dumbledore and Hermione goes against the positive spirit of the original 'Harry Potter' series. So, I don't really recommend actively seeking such fanfics.
There could also be other family members involved. For instance, if they have a son or daughter, the children might witness this event and have different reactions. The son might learn from his father's behavior and the daughter might start to question the fairness of such orders.
Dumbledore might be motivated by his over - arching plan to defeat Voldemort. He could see Hermione as a sacrifice that needs to be made. Maybe he believes that by betraying her, he can gain some crucial information from the enemy that will ultimately lead to Voldemort's downfall.
One idea could be a time - travel plot where Hermione goes back in time and teams up with a young Dumbledore to solve a mystery that has implications for the future of Hogwarts. Another could be a story where Dumbledore entrusts Hermione with a special mission that no one else in the wizarding world can handle due to her unique skills and knowledge. Maybe a plot where Hermione discovers a long - lost spell in the Hogwarts library that was created by Dumbledore in his youth, and she has to figure out how to use it to save the school from a new dark threat.
One possible motive could be for Harry's protection. Dumbledore might have seen a threat that Harry wasn't aware of, and he asked Hermione to keep an eye on him. Hermione, being the loyal friend and also having great respect for Dumbledore, would have agreed to it.