Power is a common theme. The demon king usually has great power, and the story often revolves around how he uses or loses it. For example, in some novels, the demon king might be trying to gain more power to rule over different realms.
I'm not sure specifically as it's not a widely known light novel to me. But generally, it might be about a demon king that is custom made in some way, perhaps created through some unique magic or by a special entity. It could involve his journey, his powers, and his interactions with other characters in the story.
Sure. 'The Demon King's Bride' is a great custom made demon king novel. It tells a story about a girl who is fated to be the bride of the demon king. The plot is full of twists and turns as she tries to understand and change the demon king's nature.
One common theme is the discovery of a wizard's true identity through their custom - made wand. The wand often reflects the wizard's hidden powers or their destined path. Another theme is the relationship between the wandmaker and the wizard getting the custom - made wand. It can be like a mentor - mentee relationship. Also, the power struggle between those with ordinary wands and those with custom - made, super - powerful wands can be a theme.
You can try looking for it on some popular light novel websites such as NovelUpdates. They often list various light novels, and you might be able to find information about this 'custom made demon king light novel' there.
One common theme is redemption. The demon king, after a life of doing evil, now tries to make up for his past mistakes. For example, in many novels, he might help the weak or fight against other evil forces that are a threat to the world he now wants to protect.
Forbidden love is also typical. Society or the natural order in the story's world may not accept the relationship between a demon king and a non - demon. This creates a lot of tension and drama in the story. It's like Romeo and Juliet, but with a demon king twist.
Isolation can be another theme. Despite their power, demon kings may be alone or have very few they can truly trust. They might be feared and shunned by most of the world in the story, which can lead to their own internal struggles and character development.
The theme of change is also prevalent. His entire lifestyle, values, and relationships change. He might go from being feared to being respected or befriended. There is also often a theme of secrecy. He has to keep his past a secret in some cases, which adds an element of suspense to the story. He may struggle with when and how to reveal his true identity, especially when he starts to care about the people in his new life.
Power struggle is a common theme. Usually, the demon king girl has to deal with various forces that either oppose or try to use her power. For example, in many stories, there are other kingdoms or powerful entities that see the demon king girl as a threat.
Power. Usually, the reincarnated demon king has some form of great power from their past life that they can tap into. This power often makes them stand out in the new world they are in.