A frequent theme would be identity. The werewolf has to hide its true nature in the presence of the king and the court. Also, loyalty is a big theme. The king may have to choose between his loyalty to his kingdom and his loyalty to the werewolf he loves. There could also be a theme of acceptance, as the king tries to make his people accept the werewolf as his partner.
One common theme is power struggle. The Werewolf King often has to fight to maintain his position, either against other werewolves who want to take over or against external forces like humans or other magical creatures.
Love and mates are also common themes. In many alpha king werewolf stories, the alpha king is looking for his true mate. There are often obstacles in the way of this love, like rivalries or differences in social status within the werewolf community. Also, the theme of survival pops up a lot. The werewolves have to survive in a world full of other supernatural beings and their own internal power struggles.
Another theme is the struggle between the werewolf's wild nature and their human - like emotions when in love. For example, a werewolf may have to control their instincts while being with their human or werewolf lover, which can create a lot of interesting drama.
One common theme is the struggle between the human and the wolf nature. The werewolf often has to deal with their animal instincts while in a relationship. Another theme is acceptance. The human lover has to accept the werewolf's true nature. For example, in 'Twilight' with the werewolves, there is a sense of acceptance within the pack.
Loyalty is another key theme. Werewolves are pack animals, and their loyalty to their pack can sometimes conflict with their loyalty to their love interest. This creates internal and external conflicts that drive the story forward. In a werewolf love story, the characters have to decide where their ultimate loyalty lies, whether it's with their pack or their beloved.
One common theme is the power dynamic. Usually, alphas are in a position of power, and omegas are more vulnerable. Their love often challenges this established power structure. For example, in many novels, an omega might not be considered a suitable mate for an alpha initially, but love overcomes this.
A sense of isolation is another theme. Both vampires and werewolves are often outsiders in human society, and when they fall in love across their species, they become even more isolated. They may face rejection from their own groups and have a hard time finding a place where they can be together. This isolation can lead to a strong bond between the vampire and werewolf in love as they only have each other in a world that doesn't fully accept them.
One of the themes is the idea of redemption. In some stories, the love between a werewolf and a vampire can lead one or both of them to change for the better. Also, identity crisis is common. When they fall in love, they may question their loyalty to their own kind and where they truly belong in the world of supernatural beings. It's a complex mix of emotions and loyalties.
The idea of fate also plays a big role. Some fanfictions depict the vampire and werewolf as fated lovers. Despite all the odds against them, they are meant to be together. It gives a sense of inevitability to their relationship. And then there's the theme of discovery. As they get to know each other, they also discover new things about themselves and their own species, which helps them bridge the gap between their two worlds.
One common theme is forbidden love. Since werewolves are often depicted as a different species or having a secretive world, their love with humans or other beings is usually seen as something not allowed by society or their own kind.