The main character is the evil girl, no doubt. But there could be a whole cast of characters around her. There might be her sidekicks if she has any, who help her carry out her evil plans. Then there are the people she targets, which could be anyone from a rich merchant she wants to rob to a kind - hearted neighbor she wants to drive out of town. And there could be a wise old mentor - like figure who tries to guide the other characters to overcome the evil girl's influence.
A love interest who breaks the girl's heart can also be a main character. His actions, like cheating on her or suddenly leaving her without an explanation, can be the catalyst for her transformation into an evil character. Then the story could revolve around her trying to get back at him in devious ways.
In the Resident Evil 4 story, Leon S. Kennedy is the key character. He's a tough and resourceful agent. Then there's Ashley Graham, the damsel in distress who Leon is tasked with rescuing. There are also some other characters like the villagers who are infected by the cult's parasites and act as antagonists, and there are some bosses within the cult that Leon has to face as well.
In the 'evil king story', the king is the central figure. However, there could be other important characters too. For instance, a wizard who tries to use his magic to either support the king's evil deeds or to stop him. And there may be a young princess who is held captive by the king and becomes a symbol of hope for the people to fight against him.
Since I don't know the exact 'Story of Evil Novel', I can't say for sure. But usually, there might be an anti - hero who is on the verge of becoming evil or is already evil but has some redeeming qualities. There could also be a hero who is trying to stop the spread of evil.
Given the lack of knowledge about this specific story, it's hard to determine the main characters. But if it's a horror story, perhaps there is a protagonist who tries to fight against this watching evil. There could also be side characters like a detective or a psychic who help the main character figure out what is going on and how to stop the evil from watching.
The main character is Sebastian Castellanos. He's the one who gets trapped in the nightmarish world.
Since I don't know the exact 'evil boy story', I can't say for sure. But most likely, the main character would be the evil boy himself. There might also be characters who are his victims, like other children, adults in his community, or even animals if it's that kind of story.
The main characters in 'Possibility of Evil Story' are not defined without more information about the specific story. However, common in such stories could be a character who acts as a sort of detective or observer, trying to make sense of the evil they sense or discover. There might also be characters who are part of the source of the evil, perhaps a group with a hidden, malevolent agenda, and characters who are directly affected by this evil, such as innocent bystanders who find their lives disrupted by the emerging evil.
The main character is Ethan Winters. His wife Mia is also an important character as his search for her drives the story. And then there's the Baker family, including Jack Baker, who are the antagonists that Ethan has to face.
Since we have no details about 'the 100 girl story', we can only guess. Maybe there is a leader among the 100 girls who is a main character. Or there could be a few girls who are different from the rest in some way, like having unique skills or personalities, and they are the main characters.