Fate is also a common theme. The idea that the elf bride and the human are fated to be together, whether it's through some prophecy or a magical bond. It gives a sense of inevitability to their relationship and drives the story forward as they try to fulfill their fated roles.
Love is a very common theme. The relationship between the human and the elf bride, how they fall in love across different races, is often explored.
Another theme is adventure. Since the setting usually involves different realms, like the elf realm and the human world, there are often adventures as the characters navigate through these different places. For example, they might go on a quest to save the elf bride's family or the entire elf race. Also, cultural differences between elves and humans are also a theme. How they understand and adapt to each other's cultures is part of the story. In many 'elf bride light novel', the elf bride has her own unique culture, like their way of magic, their social hierarchy, and the human protagonist has to learn about these things, which often leads to some interesting plot developments.
Without having read the 'Foul Mouth Demon Lord Elf Bride' light novel, it's difficult to be precise. But common themes in similar works often include self - discovery. The characters, whether the demon lord or the elf bride, may be on a journey to discover more about themselves, their identities, and their place in the world. Also, there could be a theme of cultural clash between the demon and elf cultures, which would add depth and conflict to the story.
I'm not sure about the exact plot as I haven't read it. But generally, it might involve the hero's adventures with his elf bride, perhaps they face challenges together in a magical world.
A theme related to power and growth is prevalent. As they start their new life as an elf, they usually have to gain power to survive. This could involve leveling up, like in a game - like system in some novels, or learning ancient elven magic. They might also form alliances with other races or individuals in their pursuit of power and to protect their new elven homeland.
There is also 'The Secret of the Elf Bride'. This novel focuses on the hidden past of the elf bride and how she overcomes difficulties with the help of the protagonist. It has a really engaging plot with elements of magic and mystery.
One common theme is the struggle for freedom. Elves, being slaves, often strive to break free from their bondage. Another theme could be discrimination, as they are slaves and likely face unfair treatment from other races. Power imbalances also play a role, with the masters having power over the elf slaves.
Obviously, the hero and his elf bride are the main characters.
One common theme is the exploration of their different magic systems. Blood Elves have their own unique way of using magic compared to Night Elves, and many fanfics delve into how these two systems interact.
One common theme could be the struggle for freedom. Since the bride is kidnapped, she would likely fight to regain her autonomy. Another might be the development of unexpected relationships. For example, she may form a bond with her captor or with those who try to rescue her.
Love and sacrifice are common themes. A war bride often has to leave her homeland, sacrificing her familiar life for love. She endures the hardships of a new country and a new life with her husband.
One of the main themes is love and acceptance. The relationship between Chise and Elias develops in a way that shows how two very different beings can come to love and accept each other despite their differences. Another theme is self - discovery. Chise, who has had a difficult past, gradually discovers her own strength and purpose through her experiences in the magical world.