There might also be an antagonist who represents the 'dark' side more directly. This character could be trying to corrupt the protagonist or disrupt the balance in the story's world. They could have their own motives, which may be related to power, revenge, or some other dark desires.
Supporting characters could include friends or allies of the protagonist who help him or her navigate through the challenges presented by the dual nature of the story. They may also be victims of the antagonist's actions, which further drives the conflict and the story forward.
One of the main themes could be the struggle between good and evil. In 'dark dual stories', there are often characters facing moral dilemmas that represent this internal and external fight.
An adventurer might be a main character. They are used to facing challenges and the dark room is just another mystery for them to solve. They might bring their tools and knowledge to deal with whatever is in the room.
Obviously, the Dark Magician is one of the main characters. It's the central figure in these duel stories.
Maybe there are some characters who are known for their unique duel styles in 'Dark Duel Stories'. For example, one character might be really good at using speed - based strategies during duels. And there could be an antagonist as well, who constantly tries to disrupt the dueling order or defeat the main character.
There could also be villains as main characters in 'dark pokemon stories'. These could be people who want to use pokemon for evil purposes, like a team that wants to control the world by using powerful and dangerous pokemon. They create a lot of conflict and are the source of the 'dark' elements in the story.
I'm not sure specifically as I haven't read the 'the dark stone stories' in detail. But there could be a brave hero who is on a mission related to the dark stone.
Often, the main character is the dark angel itself. It can be a solitary figure with a complex personality.
In some 'dark boy stories', there might be a mentor figure, like an old man who has some knowledge about the strange events that the boy is experiencing. For example, the old man might know the history of a haunted place that the boy has stumbled upon.
I'm not sure who the main characters in Dark Stone Stories are as I haven't read it specifically. But usually, there would be a protagonist who is central to the story's plot and development.
There could be a special performer, like a trapeze artist who has a tragic past. She might be haunted by something that happened in her previous life outside the carnival, and her story is intertwined with the overall mystery of the Dark Carnival. Her skills on the trapeze are not just for entertainment but also a way for her to escape, at least momentarily, from her inner demons.