Well, a very common theme is the exploration of heritage. Bella, who was an ordinary girl in the 'Twilight' world (sort of), now has to understand her new vampire - hybrid heritage as Klaus's daughter. There's also the theme of loyalty. She has to decide where her loyalties lie, between her old friends and family in Forks and her newfound family in Klaus's world. And of course, love. How does her new identity affect her relationships, especially with Edward or any other love interests she had in the 'Twilight' series? All these themes are often explored in such fanfictions.
The theme of self - discovery also pops up often. As they face the hurricane, both Bella and Klaus learn more about themselves, their limits, and what they truly value. And of course, there's the theme of the power of nature. The hurricane is a powerful force that they must reckon with, and it often symbolizes the uncontrollable elements in their lives.
One common theme is the unexpected nature of the pregnancy. It often throws their lives and relationships into chaos. Another theme could be the struggle to protect the unborn child, especially considering the dangerous worlds they come from.
A sense of identity is a big theme as well. Growing up as Klaus's daughter, she has to figure out who she is on her own. Is she just defined by her father? Or does she create her own identity? These are the kinds of questions that are often explored in this type of fanfiction, which makes it really engaging for readers who are interested in character - driven stories.
One common theme is identity crisis. Harry, being Klaus's daughter, has to figure out who she really is in relation to both her wizarding past and her new vampire heritage. Another theme is family drama. Since Klaus has a complex family history in the Vampire Diaries universe, Harry gets caught up in all that drama.
Love and friendship also often emerge as themes. Despite their differences, Bella and Klaus may find themselves growing closer during their time - traveling escapades. They learn to rely on each other and in some fanfictions, a romantic relationship may develop between them, which is a contrast to their original relationships in the source materials.
One common theme is the struggle for acceptance. The OC daughter often has to deal with Klaus's complex personality and the whole vampire - werewolf - witch world she's born into. Another theme is family loyalty. Despite the challenges, she usually shows great loyalty to Klaus and the rest of the Mikaelson family.
Love against all odds is also a big theme. Since they are from different fictional universes originally, their relationship is considered taboo or at least very difficult. Fanfictions often explore how their love can overcome these barriers. For example, in some stories, they have to battle powerful enemies who don't want them to be together. And in the process, their love becomes stronger. This is a very engaging aspect for readers as it shows the power of love in a very dramatic way.
Yes, there are quite a few. In many of these fanfictions, the idea of Bella being Klaus's daughter brings a whole new dynamic to the story. It often involves a mix of the 'Twilight' and 'The Vampire Diaries' universes, as Klaus is from 'The Vampire Diaries' and Bella is from 'Twilight'. Writers usually play with the idea of combining the different mythologies and powers from both series. For example, Bella might inherit some of Klaus's unique vampire abilities, which then changes the way she interacts with the other characters in her 'Twilight' world.
One common theme is the struggle between two worlds. Since she is part vampire and part human (or has strong ties to both), she often has to find her place. For example, in many stories, she has to deal with the secrecy of the vampire world while still wanting to be part of normal human society.
One common theme is identity. Since Bella is Aro's daughter, she often has to figure out who she really is in relation to her father and the vampire world. For example, in many stories, she has to decide whether to embrace her father's ways or carve out her own path.