Perhaps there is a villainous character associated with the red room. This character could be using the red room for some dark purpose, like hiding a crime or performing evil experiments. And then there would be the main character who tries to expose this villain and the secrets of the red room.
I don't know who the main characters are in the 'Red Room Graphic Novel' since I don't have enough details about it.
The main character in 'The Red Room Horror Story' is the person who decides to explore the red room. This person is usually full of curiosity at the start. However, as the story progresses, they become more and more frightened. While there might not be a lot of other clearly defined characters, there could be hints of previous occupants or something lurking in the room that affects the main character's experience. The story focuses mainly on this individual's encounter with the red room and all the terrors it holds.
There's often a person who ventures into the red room, like a curious explorer or a new owner of the property.
In certain versions, there is a family member or a friend who warns the protagonist about the red room but is ignored. So, this person also plays a role in the story. And of course, there could be the ghosts or the haunted entities that reside within the red room, making them the central source of horror in the story.
It might be about mystery. The red room could be a place full of secrets. Maybe there are hidden objects or past events associated with it that the characters need to uncover, creating an overall theme of mystery.
One of the main themes is the critique of society. Strindberg often shows the hollowness and pretense in different social classes through the events in the red room.
I'm not sure exactly as it depends on the specific 'the amber room novel'. But it could have a historian as a main character who is obsessed with finding the Amber Room. Maybe also a daring adventurer who joins the search.
Since I don't know the specific'spy room novel', it's hard to say. But usually, there would be spies, of course. Maybe an experienced spy who is the leader in the room, and a novice spy who is learning the ropes.
Lucy Honeychurch and George Emerson are main characters.
As I'm not familiar with the 'that night in room 401 novel', I can't say for sure who the main characters are. But based on the title, it could be someone who is staying in room 401 for the night. Maybe it's a traveler, a tenant, or a person seeking refuge. There could also be other characters who interact with this person during that night, like a hotel staff member, a neighbor, or an unexpected visitor.