One unique feature could be the perspective shift. Instead of the usual hero or villain, we get to see the world from a dungeon core's point of view. This allows for a fresh take on world - building, as the dungeon core has to manage resources, create traps, and deal with invaders in a very different way compared to a human character.
The main character is, of course, the human who has been reincarnated as a dungeon core. Their past life experiences as a human shape their actions and decisions as a dungeon. There may also be some key adventurers who are constantly trying to raid the dungeon. They are sort of the antagonists from the dungeon core's perspective, but they also have their own backstories and motives.
One unique feature is the concept of being reincarnated as a dungeon core itself. It offers a fresh perspective in the fantasy genre. Usually, stories focus on heroes or villains, but here, the dungeon becomes the center of the narrative.
At first, the dungeon core has to figure out how to survive. It learns about the resources available in its environment and how to use them effectively. Then, as it grows stronger, it has to deal with more powerful adventurers who are after its treasures. This creates a cycle of growth, conflict, and further growth in the story.
Well, it could be about a character who becomes a dungeon master through the core. This character might face numerous difficulties such as dealing with powerful monsters that inhabit the dungeon, competing with other dungeon masters if there are any in the story. Also, the story may include how the dungeon master uses the core's capabilities to build unique and dangerous dungeons to attract or deter adventurers.
I don't know specifically since I haven't read this light novel. But typically, there would be the dungeon master as a main character. There might also be some important adventurers who are either friends or foes of the dungeon master.
The most obvious difference is the origin. Traditional dungeon cores are often some sort of magical or otherworldly entity. In human dungeon core fanfiction, it starts as a human. This means different motives. A human - turned - core may be more sympathetic to adventurers compared to a traditional core that may be more focused on self - preservation or expansion.
The exploration of human emotions within the context of being a dungeon core is also fascinating. For example, a human dungeon core might feel loneliness as it's stuck in one place while adventurers come and go. It can also experience different levels of morality when deciding on the dungeon's defenses and rewards.
One popular 'human reincarnated as elf light novel' is 'Re:Monster'. In this story, the protagonist is reincarnated as a goblin, which is related to the elf concept in the sense of being a fantasy race. It has an interesting plot about the protagonist's growth and his interactions in the new 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.