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.
Typically, in a 'worm the gamer fanfiction', one of the main characters might be a gamer who has some special ability or knowledge that becomes relevant in the 'Worm' universe. Another could be a well - known character from 'Worm' who teams up with the gamer. For example, if there are capes in the 'Worm' story, one of those capes could interact with the gamer character, and together they face challenges in this new fan - created scenario.
Since I don't know the specific 'worm dragon fanfic', it's hard to say. But it could be the worm dragon itself as a main character. There might also be a brave adventurer or a curious scientist who is trying to understand or interact with the worm dragon.
Taylor Hebert is often a popular character in 'worm gamer fanfiction'. Since she's a central figure in the original 'worm' story, writers like to explore her character further in the context of a gaming - inspired plot. For instance, she might gain new abilities or face challenges related to the gaming elements.
I don't know the exact main characters in 'worm graphic novel'. However, if it's about a worm's journey, the main character would likely be the worm itself. There might also be characters like a wise old beetle that gives advice to the worm, or a friendly ant that the worm teams up with at some point in the story.
The boy, who is the one having an encounter or an experience with the worm, and the worm, which is a living creature that the boy comes across. These two are the main characters in the 'the boy and the worm story' as they are the ones around which the story seems to revolve.
One possibility is that the story is told orally among the worm characters, and when we say 'read', it's more like they are repeating and passing on the story. So they hear the story from an elder worm or a storyteller worm, and then they in turn 'read' it by retelling it to others. This would be a form of cultural or community - based knowledge transfer within the worm society.
Perhaps there could be new characters introduced that are specific to the 'worm' part of the fanfic. They could be worm - like creatures with their own personalities and motives. These new characters could interact with Kratos and other existing 'God of War' characters in different ways.