There's the devil, who could be portrayed in different ways, maybe as a seductive and powerful figure. And then there's the love interest. It's possible that there are also other supporting characters like the devil's cohorts or the friends or family of the love interest, who play important roles in either facilitating or hindering their love story.
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 sure as I haven't read it specifically. But it might be about the relationship between a devil - perhaps a female devil - and the person she loves. It could involve how their love overcomes the differences between their natures.
Since I haven't read the novel, it's hard to say for sure. However, we can expect there to be a protagonist who is the one experiencing this unusual love. And then, of course, there would be the 'devil' character. There might also be other supporting characters like friends or family members of the protagonist who react to this strange relationship.
Since we only have the title 'vanessa her love story', we can assume Vanessa is a central character. Her love interest is surely another main character. There could be other characters that are part of the background of the story, for example, people at her workplace or in her community who influence her relationship in some way. It could also be that her parents are characters in the story, either supporting or opposing her love choice.
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.
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.
Obviously, the she devil herself is a main character. She is likely at the center of the story, driving the plot with her actions and decisions regarding her life and love.