Yes, it is quite popular in some corners of the fan fiction community. The idea of Harry and Voldemort being soulmates offers a very unique and complex take on their relationship. It goes against the traditional view of them as arch - enemies and explores a much deeper, more psychological connection between them.
One common theme is the struggle between good and evil. Since Harry is typically seen as good and Voldemort as evil, the idea of them being soulmates challenges this binary. Another theme is redemption. Voldemort might be seen as having a chance at redemption through his connection with Harry. Also, there's the theme of fate and how their destinies are intertwined in a way not originally thought.
One common theme is protection. Since Remus is an older and more experienced wizard, he often takes on the role of protecting Harry, not just because of their soulmate bond but also because of Harry's importance in the wizarding world.
One great example could be a fan fiction where Viktor and Harry meet during an international Quidditch event. They feel an instant connection that they can't explain. In this fic, their relationship could develop as they exchange letters and secrets about their respective magical worlds. Another example might be a story set in a post - war scenario where they come together to help rebuild the wizarding community and realize their soulmate bond during the process.
There's also 'Soulmates' Path'. In this fanfic, Remus and Harry start to realize their special bond gradually. It shows how their friendship evolves into something more profound. It has some really touching moments, like when Remus helps Harry understand his own powers better because of their soulmate connection.
One way to portray their relationship differently is to make it a slow - burn. Instead of an instant soulmate recognition, they start as acquaintances, gradually becoming friends and then realizing they are soulmates over time. Another way could be to have them in a role - reversal situation. For example, Harry could be the one more experienced in international wizarding relations and Viktor could be the one learning from him, which would change the dynamic of their relationship compared to the usual portrayal.
One of the best is 'Pride and Prejudice' by Jane Austen. The relationship between Elizabeth Bennet and Mr. Darcy is a classic example of soulmates. They start off with misunderstandings and prejudices against each other, but as the story unfolds, they come to understand and love one another deeply.
One characteristic is a deep understanding. In many soulmates novel books, the characters just seem to 'get' each other without much explanation. For example, in 'The Time Traveler's Wife', Henry and Clare understand each other's quirks and desires despite the chaos of Henry's time - traveling. Another is an unbreakable bond. Like in 'Twilight', Bella and Edward have this bond that no matter what difficulties come their way, they are drawn to each other.
The Fault in Our Stars by John Green. It's a story of two teenagers, Hazel and Gus, who meet at a cancer support group. They quickly form a deep bond, a soulmate - like connection as they share their experiences, dreams, and fears while facing their illnesses. Their love story is both poignant and beautiful.
In the 'Soulmates by Dragon's Mistress Fanfic', the concept of soulmates might refer to a deep, spiritual connection between characters. It could be a bond that goes beyond the ordinary, perhaps involving shared destinies or a profound understanding of each other at a fundamental level.