One plot device might be a double - agent situation. Hermione could be mistaken for a double - agent because of her different abilities and background, and Bond has to figure out the truth. This adds an element of mystery and suspicion to the story.
One common plot device is the 'what - if' scenario. For example, what if Hermione had been the one to save Harry from the Dementors instead of his father's Patronus? This can lead to a deeper emotional connection between them. Another is the 'arranged - relationship' plot, where they are forced to pretend to be in a relationship for some magical reason, but end up falling in love for real. Also, the 'jealousy' plot device, where they get jealous of each other's relationships with other characters and realize their true feelings.
One common plot device is the use of mind control or dark magic spells on Hermione. This forces her into the slave role. Another is the idea of Bellatrix using Hermione to get to Harry or the other members of the Order. Sometimes, there's a focus on Hermione's inner strength as she tries to break free from the slavery, which is also a plot device to create tension and drama.
A frequently used plot device is the protection of the timeline. Hermione, as a Time Lady, has to safeguard the integrity of the wizarding world's timeline from those who would try to change it for their own gain. Also, the idea of alternate timelines can be explored. For example, what if Voldemort won in a different timeline? Hermione might have to travel there and fix things. There could also be plot devices related to her newfound powers clashing with the existing magical order in the wizarding world.
Often, Hermione's injury serves as a catalyst for character development. Her own strength and intelligence are put to the test as she has to deal with being injured. She might have to rely on her knowledge of magic in new ways while being incapacitated. And there could be a sub - plot about her relationship with other characters. Maybe she and Ron grow closer as he takes care of her, or she and Harry have deeper conversations about the risks they all face. This all makes for an engaging story.
A plot device often used is the 'redemption arc' for Rodolphus. Maybe he starts to question his Death Eater ways because of Hermione. He could show some kindness or vulnerability that Hermione is attracted to. Also, the 'fish out of water' situation can be used. For instance, if Rodolphus is forced to work with Hermione in a non - Death Eater context, like in a magical research project, and their relationship blossoms from there.
One common plot device is the use of a love potion or a spell gone wrong that initially brings Hermione and a Malfoy together. Another is the discovery of a long - lost prophecy that dictates their union for the greater good of the wizarding world.
Often, there's a countdown or a time limit involved. Maybe there's a magical condition that if not met within a certain time, her parents' memories will be lost forever. This adds a sense of urgency to the story. Also, the use of Hermione's own guilt and determination as a driving force for her to keep trying in the face of multiple failures is quite common.
A typical plot device is the discovery of rare Pokemon. In these fanfictions, the main character might stumble upon a very rare Pokemon, and this encounter could attract other characters or Pokemon, gradually forming the harem. Also, the mystery element, such as an unknown power or a hidden place related to Pokemon, can bring the harem members together as they explore and solve it. And of course, the training montages where the trainer helps the Pokemon in the harem grow stronger are quite common too.
Often in these fanfictions, a plot device is the existence of an alternate dimension. The Avengers could find a way to access this dimension where things didn't go wrong and bring back the good elements from there to fix their own world. Additionally, a Deus ex Machina - like event, such as a sudden, unexplained cosmic force that restores everything to normal, is sometimes used. However, this can be a less satisfying device as it doesn't really involve the characters' efforts as much. Another plot device is the power of teamwork being magnified to an extreme degree. The Avengers, by working together in a more perfect way than in the original story, are able to fix all the problems.
One common plot device is the 'accidental discovery'. For example, the protagonist might accidentally stumble upon a hidden vampire lair or a secret about a character's past. Another is the 'accidental transformation', like a human accidentally being turned into a vampire or a werewolf in an unexpected way. Also, the 'accidental meeting' of two important characters who were not supposed to cross paths can lead to a whole new set of events in the fanfiction.