One common theme could be magic and its use. Since they are all part of the Harry Potter universe, magic often plays a crucial role in the stories. Another might be relationships, whether it's friendship, rivalry or something more complex between these characters.
Themes like loyalty and betrayal can also be common. In the world of Harry Potter, these concepts are very important. Tonks, for instance, is a loyal member of the Order of the Phoenix. Fanfictions might explore how her loyalty is tested in relation to Narcissa. Also, power dynamics can be a theme, especially considering the different positions and abilities these characters have.
There are often themes related to identity. Tonks has her shape - shifting ability which can be tied to her identity. Narcissa has her own family - related identity in the Malfoy family. Fanfictions might explore how these identities interact and change. Additionally, themes of mystery and discovery are common, as the Harry Potter world is full of secrets and things to be uncovered.
Well, finding good fanfictions depends on your taste. Some might focus more on the magical adventures with these characters in the context of the Harry Potter world, while others could explore their relationships in unique ways. It might take some time to sift through and find the ones that really resonate with you. You could also check out fanfiction communities and ask for recommendations there.
One common theme is redemption. Narcissa is often portrayed as seeking redemption for her past actions and finding it through a relationship with Harry. Another is the idea of breaking family traditions. Since the Malfoys are traditional pure - blood supremacists, Narcissa going against that by falling for Harry is a big part of the story in many fanfictions.
One common theme is the internal struggle. Andromeda has to deal with her feelings for Harry while also respecting the boundaries of his own life and relationships. Another theme could be secrecy. Since it's an unusual crush, she might try to keep it a secret from others in the wizarding community.
One common theme could be self - discovery. Since it involves a different take on the characters, fem Harry might be on a journey to discover her new identity and how she relates to Tonks in this new dynamic. Another theme could be the exploration of their relationship against the backdrop of the Harry Potter universe, like how they deal with the magical world's challenges together.
One common theme is redemption. Since Narcissa was part of the Death Eaters' circle, many fanfics explore her journey towards redemption, like making amends for her past actions. Another theme is family. Narcissa's love for her family, especially Draco, is often a central focus, showing how far she'll go to protect them.
Family loyalty is also a big theme. Narcissa is deeply tied to her family, and fanfictions often play with the conflict between her loyalty to her family (like Lucius and Draco) and her possible newfound understanding or connection with Harry. It creates a lot of internal and external drama.
One common theme is redemption. Often, time travel gives Narcissa a chance to change her actions in the past, especially regarding her loyalty to Voldemort. Another theme is forbidden love. Since Harry and Narcissa are from different sides in the original story, time travel allows for a different exploration of their relationship that was not possible in the normal timeline.
Another theme is loyalty. Tonks' loyalty to the Order and to Dumbledore's cause often intersects with her relationship with Harry. Fanfics might explore how Harry comes to rely on Tonks' loyalty in difficult situations, like when he's on the run or facing Voldemort.
A major theme is the exploration of their unique magical abilities. Tonks' Metamorphmagus ability and Harry's connection to Voldemort are often used as plot devices. For example, some fanfictions have Tonks using her ability to help Harry in some way. Also, the theme of sacrifice is common. Since both are in the fight against the Dark side, they may have to sacrifice things for the greater good in these stories.
One common theme is friendship. Since they are both part of the wizarding world, fanfics often explore how they become friends and support each other. Another theme could be adventure, as they might go on quests together or face dangerous situations side by side.