Since I don't know the exact 'cave shadow boy story', I assume the main character is the boy. There might also be other characters like his friends or family members who he left behind before entering the cave, or there could be some mysterious figures that he encounters in the cave because of the shadows.
The most obvious main character is the boy. However, in the story, there could be other characters that are related to the concept of the cave and shadows. For example, if the story has a historical or cultural background, there might be ancient guardians of the cave whose presence is only hinted at by the shadows. Or there could be a mentor - like figure who has told the boy stories about the cave before, and this person could be an important character in the overall narrative of the 'cave shadow boy story'.
The main character is surely the boy. But depending on the nature of the story, there could be an old hermit who lives near the cave and has some knowledge about the strange shadows. Or perhaps there are some shadowy entities that act as characters too. Maybe the boy has a pet that follows him into the cave, which could also be considered a character in the story.
I'm not sure specifically what the 'cave shadow boy story' is. It could be a very unique or local story. Maybe it's about a boy who has some special experience in a cave related to shadows, like he discovers strange shadow - like creatures or some mystery that involves shadows in the cave.
In many cave - related stories, there could be an explorer as a main character. In the 'Misery Cave Story', it might be an adventurer who ventures into the cave out of curiosity or in search of something valuable. There could also be a guide who is supposed to lead the way but maybe things go wrong. Another possibility is that there is a lost hiker who stumbles upon the cave and becomes part of the story.
As the story isn't known to me, the main characters might be a group of friends who decide to explore the dark cave out of curiosity. Or it could be a solitary adventurer seeking solitude or a particular treasure hidden within the cave.
There could be an explorer as a main character, who is the one to enter the cave and face the monster.
In some 'cave man stories', there could be a hero - like a cave man who saved the group from a big predator. He became a symbol of courage for the whole community. And there might be the shaman - like figure who was believed to have some special connection with the spiritual world and could perform certain rituals for the well - being of the group.
There could be an explorer. They are often the ones who dare to enter the cave and face the monster.
It might be a group of friends. You know, they hear about the spooky cave and decide to check it out for fun or out of curiosity. They could be young and naive, not fully realizing the danger they are getting into, and then they have to face all kinds of scary things in the cave together.
Perhaps the main character is a curious individual, like a child or a young adult. And there might be some animal characters as well that he encounters during his adventure in the cave.
I don't know specifically as we don't have much information about this 'Balrog Cave Story'. But it could be a hero who dares to enter the cave where the balrog lives.
I'm not sure specifically without more information about the story. It could be a group of explorers, perhaps some young and adventurous friends.