The theme of destiny also frequently appears. It's often about the mate of Apollo being fated to be in the Harry Potter world for a certain purpose. Maybe they are there to change the course of events in the wizarding world using Apollo's powers or knowledge. This gives a sense of grandeur and purpose to the story, making it more than just a simple crossover.
Another theme is the idea of acceptance. Percy, coming from his own world, has to accept Apollo as a mate and vice versa. This is often shown through their internal monologues and interactions with other characters. For example, they might face opposition from some of the other gods or demigods who don't understand their relationship. And in dealing with this, they grow closer together.
One common theme is the power struggle. Since they are on opposite sides in the original story, their relationship as mates can create a complex power dynamic. Another is the idea of redemption for Voldemort.
One common theme is the clash of cultures. Since centaurs have their own unique culture in the Harry Potter world, when a human becomes involved with a centaur as a mate, there are often misunderstandings and a need to bridge the gap between the two cultures.
One common theme is the forbidden love aspect. Since vampires are often seen as different and dangerous in the Harry Potter universe, a relationship between a wizard or witch and a vampire is considered taboo. Another theme is the discovery of new powers or abilities that come from the union of a magical human and a vampire.
One common theme is destiny. It often shows that Harry and his soul mate are meant to be together by some greater force. Another theme is self - discovery. Through the relationship with their soul mate, Harry or the other character discovers more about themselves.
One common theme could be the struggle between good and evil. Harry is seen as a symbol of good, while Greyback is clearly on the side of evil. Their relationship would likely involve Harry trying to resist Greyback's more malevolent tendencies.
One common theme is the forbidden love aspect. Since vampires are often seen as outsiders in the wizarding world, a relationship between a male vampire and a wizard or witch is usually considered taboo. Another theme is the power struggle. The vampire may have certain powers that are different from the magical abilities in the Harry Potter world, and how they interact or clash is often explored.
One common theme is redemption. Draco is often seen as a character who needs to redeem himself, and his relationship with Harry as mates can be a part of that journey. For example, in many stories, Draco realizes the error of his ways through his bond with Harry.
There are several common themes. For example, the theme of loyalty often comes up. Both Harry and Jasper are characters who value loyalty in their respective original stories. So in the fanfiction, their relationship might be strengthened by their loyalty to each other. Love and friendship are also big themes. How their relationship develops from an initial encounter to a deep bond, whether it's romantic love or a strong friendship, is often explored. And there's usually a theme of adventure as well, as they might go on quests or face challenges together in the fanfiction.
In these fanfictions, the theme of mutual understanding is quite common. Since they are soulmates, they have a unique ability to understand each other's thoughts and feelings. Another theme is the protection of their bond. They often have to fight against external forces that try to break or manipulate their soulmate connection. The theme of sacrifice also appears. Sometimes, one of them has to sacrifice something for the sake of their relationship or for the greater good of the wizarding world, knowing that their soulmate will support them through it all. Additionally, the theme of a shared purpose is prevalent, whether it's to reform the wizarding world or to uncover some long - hidden magical secrets.