There might be a human who gets involved with the devil. This person could be a curious soul who is lured by the devil's promises. For instance, a poor farmer who is desperate for a good harvest and makes a deal with the devil.
I'm not entirely sure about all the main characters specifically, but there are usually characters who are involved in the summoning and dealing with digital devils.
The main characters in the 'Dance with the Devil Story' can be diverse. There is usually the naive or desperate individual who makes the ill - fated choice to interact with the devil. This person might be someone who has been wronged by society or is simply greedy for more. Then there is the devil. The devil can be portrayed in different ways, sometimes as a suave tempter, other times as a terrifying and grotesque being. There could also be side characters like the protagonist's friends or family who are affected by the protagonist's actions.
It depends on the specific version of the story. It could be a foolish man who is the main character as he is the one who decides to dance with the devil.
In the 'devil in the dark story', if it's a horror - themed one, the main character might be a young journalist looking for a big story. They hear rumors about the devil in the dark and decide to investigate. There could also be a group of superstitious villagers who play important roles. They might be the ones who first noticed the strange happenings related to the devil in the dark and either help or hinder the journalist's investigation.
There might be a protagonist who is tempted by the devil. This character could be someone with a strong will initially, but the devil tries to break that. There could also be a side character, like a wise old man or a priest, who provides some sort of guidance or counterpoint to the devil's influence.
There could be the devil itself as the main character, who creates and presents the riddles. There might also be a hero or a group of heroes who are trying to solve the riddles.
The main character is Satan, who becomes a part - time worker in Tokyo. And his demon servant is also an important character.
Since I don't know the specific 'the devil to pay true story', I can't say for sure who the main characters are. It could be ordinary people who got caught up in extraordinary circumstances.
In 'devil all the time story', Arvin Russell is a key character. He is a complex figure who has to deal with the various evils around him. Also, there are other characters like Willard Russell who play important roles in the overall narrative, each with their own quirks and motives that contribute to the story's development.
Since I'm not familiar with an actual 'Dance with the Devil' anime, I can only speculate. There might be a young and naive hero who gets tricked into the devil's deal. And of course, there would be the devil character, who is probably very cunning and manipulative.