One common plot device is the need to fix something in the past. For example, preventing a dark wizard from getting a powerful artifact that later causes trouble in their time. It creates a sense of purpose for their time - traveling adventure.
One common plot device is the grand gesture. For example, Ron might plan a big, public event to declare his love for Hermione and his desire to have her back. It could be something like a magical display in the middle of Hogwarts courtyard.
One great Ron and Hermione time travel fanfiction is 'Time's Twist'. In this story, they travel back to their first year at Hogwarts and have to navigate through the events again, but with their future knowledge. It's really interesting to see how they interact with their younger selves and change certain things.
One common plot device is the use of dark magic threats. For example, a new and powerful dark wizard might be after Hermione. Another could be dangerous creatures. Like a basilisk loose in Hogwarts again, and Hermione is one of the first to encounter it, which makes her scared. Also, threats from within the wizarding society, such as a group of pure - blood supremacists targeting her for being a Muggle - born, could be a plot device.
Well, often in these fanfictions, Hermione is given a secret mission. It could be something like uncovering a plot against Hogwarts by an unknown dark wizard. This mission then leads her to use her spying skills. She might disguise herself, a classic spy move. And she could be using magical artifacts as spying tools, like a modified Marauder's Map that not only shows people's locations but also their conversations. Plot twists are also common, such as when the person she thought was an ally turns out to be the real villain.
One common plot device is Hermione using her hacking skills to access restricted areas of the wizarding world, like the Ministry of Magic's secret files. This could lead to her uncovering hidden conspiracies or long - lost magic. Another is her teaming up with other characters, perhaps Harry and Ron, where she uses her hacking to help them in their adventures, for example, finding out the real identity of a mysterious villain through digital - like magic means in the wizarding world.
A third common plot device is the conflict it creates with the existing wizarding world order. The wizarding world may not be ready to accept a student who is the daughter of a Greek goddess. This could lead to Hermione facing discrimination or suspicion, which she then has to overcome while also dealing with her own self - discovery and growth as Artemis' daughter.
A third common theme is the discovery of lost magic. Since they are in a different time, they might come across magic that has been forgotten in their own time. This could range from ancient spells to magical artifacts. It adds an element of mystery and adventure to the fanfictions as they try to understand and use this lost magic.
One common theme is friendship. Harry's act of saving Hermione emphasizes his loyalty and deep friendship towards her. It shows that he values her more than just a fellow Gryffindor or classmate.
One common plot device is mind control. For example, Voldemort or some other dark force could control Harry's mind and make him kill Dumbledore without his full awareness. Another is a misinterpreted prophecy. Harry might think Dumbledore is endangering his life based on a wrongly understood prophecy.
One common plot device is the discovery of her royal lineage. It usually happens in a dramatic way, like finding a hidden letter or a magical object that reveals her true identity. Another is the conflict between her wizarding life and her new royal duties. She has to balance things like going to Hogwarts and attending royal functions. Also, there's often a love interest from the royal court, which creates a love triangle with her existing relationships in the wizarding world.