Well, in fantasy fiction, cave trolls differ from other trolls in several ways. For one, their physical features might be more suited to cave living. They could have a thicker hide to protect against cave - related hazards. In terms of behavior, cave trolls are usually more territorial about their caves. While other trolls might be more nomadic or have a wider range of movement. Also, the diet of a cave troll is likely to be more limited to what is available in or near the cave, such as bats or underground fungi, as opposed to other trolls that might have a more diverse diet depending on their habitat.
Trolls in fantasy fiction are often large and brutish. They usually have great physical strength. For example, in some stories, they can uproot trees with ease.
They might get really excited and start comparing it to their own experiences in the Trolls world. Maybe they'll laugh at the funny parts or feel inspired by the creative interpretations in the fanfiction.
The main difference is the addition of alchemical solutions. While 'worm' is mainly a science - fiction story, the fanfic brings in the concept of alchemy which is more related to the transformation of substances and often has a touch of the mystical. So it changes the power dynamics and the overall feel of the story.
The main difference is the deviation from the original plot. In 'canon divergence worm fanfic', the story takes a different turn, while the original 'Worm' follows a set path. For example, a character's death in the original might be reversed in the fanfic.
Compared to fairies, which are often associated with beauty and magic related to nature, trolls are more earthy and primal. Fairies might flit around and do good deeds, but trolls are likely to be lurking in the shadows waiting to cause harm. They don't have the delicate features or the positive connotations that fairies do. Trolls are also different from dragons. Dragons are often large, powerful, and can fly. Trolls are more terrestrial and not as majestic in appearance. They are more like the hulking, lumbering threats on the ground.
A simple way could be through a dimensional rift. A character from RWBY accidentally stumbles into the Worm universe or vice versa. Then they have to figure out how to get back while dealing with each other's worlds' problems.
The moral could also be about the significance of respecting others. If the troll king disrespects those around him, whether they are his subjects or other creatures in the story, it can lead to unrest and his own downfall. Respecting others creates a positive environment and can prevent conflict, as shown in the story where the king's lack of respect may be a contributing factor to his negative fate.
The Trolls origin story is that they come from a magical land filled with music and color. They are small, furry creatures with a love for fun and celebration. Their world was once threatened by the Bergens, who saw the Trolls as a source of happiness (which they could gain by eating them). But the Trolls managed to survive and keep their positive spirit alive through their music and unity.