Perhaps Hermione is a rebel against the current royalty. She believes the current regime is corrupt and uses her magic and knowledge to start a revolution. Along the way, she might discover that there are some good aspects of the royalty system that she can preserve.
A plotline could be that Hermione is a visiting diplomat from a magical kingdom where she holds a high - ranking position equivalent to royalty. She comes to another kingdom and has to navigate through political intrigue and possible romances.
Another plotline is that Hermione discovers she has a magical connection to an ancient royal bloodline. As she explores this connection, she uncovers secrets about the kingdom's past and has to fight against dark forces that are trying to use the royal power for evil purposes. There could be a lot of mystery and adventure in this plot as she delves deeper into her heritage.
One plotline could be that Hermione is suddenly thrust into the spotlight of Muggle royalty. She has to learn all the protocols and etiquettes while still trying to keep up with her studies at Hogwarts. This causes some hilarious and also some tense situations as she tries to juggle both worlds. Another plotline might be that there is a threat to the Muggle royal family, and Hermione, with her magical skills, has to protect them. This could involve her using spells to defend against dark wizards who are after the royals for some unknown reason.
Well, in some 'Hermione Disappears' fanfiction, it might be that she is targeted by a group of anti - Muggleborn wizards. They manage to make her vanish using some dark magic. Her friends, Harry and Ron, then start a frantic search. They might follow a series of mysterious clues she left behind before disappearing. It could also be that a time - traveling mishap causes her to disappear from the current timeline and she is stuck in another era.
One possible plotline could be Hermione using her intelligence to outwit her targets. For example, she might study their habits and weaknesses in the same way she studies for her Hogwarts classes. Another plotline could involve her having a moral dilemma. As an assassin, she would be taking lives, but her Gryffindor values might conflict with this. She could struggle with whether to follow orders or do what she believes is right. A third plotline could be her forming an unlikely alliance with other characters. Maybe she teams up with someone from the wizarding underworld who has skills she needs to complete her missions, and together they face various challenges and enemies.
One possible plotline could be that Hermione is magically bound to serve Slytherin students in tasks related to academic competition. For example, she might be forced to help them with difficult potions or spells in a way that gives them an unfair advantage over other houses. Another could be that she is made to act as a spy within Gryffindor for the Slytherin house, leading to all kinds of internal conflicts and moral dilemmas for her.
One possible plotline could be Hermione attending figure skating competitions and getting inspired to write about the sport. She might meet a figure skater and become friends, and through that relationship, learn more about the dedication and hard work required in figure skating.
One possible plotline could be Hermione discovers a hidden dragon lair and forms a bond with a young dragon. She then has to keep it a secret from Hogwarts faculty while training the dragon to fly and perform tasks. Another could be that she is chosen by an ancient dragon-riding order to help save the wizarding world from a dark force that only a dragon rider can defeat.
One interesting plotline could be Draco and Hermione being forced to work together in a secret basement for some magical research. They start off hating each other but gradually develop an understanding. Another could be they are hiding from some dark forces in the basement and in the process, their relationship changes. Maybe they find a powerful magical artifact in the basement and have to decide what to do with it together, which also affects their relationship.
A popular plotline is the redemption arc for Draco. In these fanfictions, Hermione might be the catalyst for his change. He realizes the error of his ways under the influence of her strong moral compass. There could also be a plotline where they are competing for the same goal, like a powerful magical artifact. As they hiss and argue throughout the competition, they gradually develop feelings for each other. Also, some fanfictions have a plot where they are both involved in a dangerous situation outside of Hogwarts, like in the wizarding underworld, and they have to rely on each other to survive.
She could develop a more assertive personality. As a tomboy, she might become more outspoken and not be afraid to voice her opinions, even if they go against the norm. For instance, she could challenge the old - fashioned views of some of the Hogwarts professors regarding gender roles in magic.
One possible plot could be that during a dangerous wizarding battle, Hermione gets hit by a dark spell and her friends, like Harry and Ron, have to find a way to reverse the spell's effects. Another plot might involve Hermione being poisoned accidentally in the Hogwarts kitchens while researching a new potion, and she has to fight for her life as the school's medical staff tries to find an antidote.