The theme of family expectations also frequently appears. In many 'a suitable wife fanfic', the main character has to balance his own desires with what his family deems suitable in a wife.
The theme of sacrifice also pops up a lot. Castiel may have to sacrifice his angelic duties or powers for his wife, or the wife might sacrifice her own safety or desires for Castiel. This creates a sense of drama and emotional depth in the stories. For instance, in one fanfic, the wife gives up her chance at a normal life to stay with Castiel in the dangerous world of angels and demons.
One common theme is the clash of two different worlds. Since Alastor is a rather unique and often dark character, the fanfic usually shows how his wife, who might be from a different background, copes with his demonic nature.
In 'Naruto wife swap fanfic', a prevalent theme is the disruption of the normal relationship order. This often creates chaos and interesting plot developments. It can also be about characters learning to adapt to new relationship situations. Sometimes, it might involve themes of jealousy or new - found love as characters interact with their 'swapped' partners in ways they hadn't before. And of course, there's often a bit of humor as the characters try to figure out what's going on.
Another theme might be the idea of appearance and status. In the context of a 'trophy wife' in Twilight fanfic, the character's looks and social standing could play a significant role. For example, how the character is perceived by others in the vampire or werewolf communities. And also how they use their appearance and status to navigate the complex relationships in the story.
Love and relationship themes are quite common. It could be about how the Black Panther and his wife met, their courtship, and how they support each other in ruling Wakanda.
Another common theme is the growth of their relationship. Some fanfics focus on how they continue to understand each other better over time. Hinata might become more confident with Naruto's love, and Naruto might learn more about Hinata's quiet strength. It's about how they evolve as a couple.
One common theme is love and relationship building. Since it's about his wife, it often explores how they fell in love and how their relationship grows over time.
One common theme is the idea of love developing out of convenience. Since it's a contract marriage, initially it might be just for some practical reasons, but then real feelings start to emerge. For example, in many of these fanfics, the two characters start to notice little things about each other that they find endearing.
Love and commitment are common themes. Since Bella is Paul's wife in these fanfics, their relationship is often centered around deep love and the commitment they have to each other.
One common theme is the clash of different cultures. Loki comes from a different mythological background, and when his wife enters the HP world, there's a lot of cultural differences to deal with. For example, the magic in Loki's world might be different from that in Hogwarts.