Since I'm not familiar with the 'the silent woman novel', it's hard to name the main characters precisely. However, based on the title, the silent woman is bound to be a central figure. There might be a male character, perhaps a love interest or a family member like a father or a brother, who plays an important role in the story. There could also be a confidant, someone she might eventually open up to, or an antagonist who tries to break her silence in a negative way.
Since we don't have much information about the 'the silent woman story', it's hard to say for sure. But surely the silent woman herself is a main character. There might be other characters like those who interact with her, perhaps a family member or a friend who tries to understand her silence.
There could be a detective character in the 'Silent Witness Novel' who tries to communicate with the silent witness. And the silent witness might be a female character, perhaps a young woman who is afraid to speak out at first. There might also be a villain in the story who is trying to keep the witness silent.
James Sunderland is likely one of the main characters as he is central in the Silent Hill 2 story.
There might be a supporting character who helps the main character break out of their shell of silence. This character could be very talkative or have some special ability to communicate that contrasts with the silent voice of the protagonist.
There's Shoya Ishida, who is a complex character. He starts off as a troublemaker, but as the story progresses, he goes through a significant transformation. And then there's Shoko Nishimiya, the deaf girl. She is very kind - hearted despite all the hardships she faces. Their relationship forms the core of the story, and other characters also play important roles in their lives, like their classmates.
Since I haven't read the 'Silent Lover Novel', I don't know who the main characters are.
The main characters in the 'Silent Hill Graphic Novel' are likely to be those who are drawn into the nightmarish world of Silent Hill. They could be people with their own personal issues and fears that are then amplified by the town's evil influence. There may be a hero - like figure who tries to fight against the terrors of Silent Hill, or a group of survivors who band together. It's also possible that some characters are manifestations of the town's own psyche, blurring the line between human and the supernatural forces at play in the town.
I'm not sure specifically who the main characters are without reading the novel. But they could be soldiers on the front line. Maybe there's a young and inexperienced soldier who has to grow up fast in the face of war, and an older, more experienced one who acts as a mentor.
Since there's no prior knowledge about this 'Silent Red Witches' novel, it's hard to name the main characters. However, it's reasonable to assume that there are some central figures among the silent red witches. Maybe there's a witch with a special power that stands out more than the others, or a group of witches who work together closely and are the driving force behind the plot. It could also be that there are characters outside of the witches, like a human who gets involved with them and becomes an important part of the story as well.
In 'The Silent Patient', Alicia Berenson is a central figure. She's the woman at the center of the mystery, having killed her husband and then remaining silent. Theo Faber is another key character. He's a psychotherapist - turned - detective of sorts. He's drawn to Alicia's case and is eager to break through her silence. There are also other characters like Alicia's friends and family who play important roles in the backstory and the overall mystery.