The main character is surely the girl trapped in the basement. She is the victim in this story. As for the other main character, it's the captor. The captor is the one responsible for her being in the basement, and this person is usually portrayed as cruel and controlling. Their actions towards the girl are what drive the story forward.
The main character would surely be the girl who was in the basement. And there must be the person who put her there, whether it was a kidnapper, an abuser, or someone with malicious intent.
Since we don't have the full story, it's difficult to name the exact main characters. However, the girl is the obvious main character. Depending on the nature of the story, if it's about a crime, the perpetrator would be a key character. If it's a story about the girl's relationship with the basement as a place of solace, there could be an older person like a grandparent who used to tell her stories about the basement and influenced her view of it.
Typically, the main character would be the girl who was held in the basement. And there would also be the captor who kept her there.
Typically, the main character is the girl who was held in the basement. And there would be the perpetrator who kept her there.
Typically, the main character is the girl who was held in the basement. And there is also likely to be the perpetrator, the person who held her captive. But the details of their identities would vary depending on the specific real - life case that inspired the story.
Typically, the main character is the girl who is in the basement. And there is often another character, the person who put her there, like a captor or an abuser.
The main character is likely the girl in the basement. There may also be a captor or someone who has put her there.
The main character in the 'girl in the basement story' is the girl that is in the basement. She is the focus as she endures the captivity and all the associated horrors. The other crucial character is the captor. This individual has the power over the girl, whether it's through physical force or psychological manipulation. There could also be characters on the periphery, like family members of the captor who might be complicit or completely ignorant of what's going on, or law enforcement officers who finally come to rescue the girl.
In some versions of a 'girl in the basement story', there could be a villainous character. This could be an old neighbor with a dark secret, or a kidnapper. And then there would be the girl, who is the protagonist. There may also be side characters like the police officers or detectives if the story has an investigation aspect to it. The girl's character would be developed as she tries to survive and escape, while the villain's character would be shown through their actions towards the girl in the basement.
I don't have enough information to determine the main characters. It could be the homeowners if it's a story about something that happened in their basement.