Since I don't know the specific 'the monster bed story', it could be a child who discovers the strange bed. Maybe there's also a parent or an older sibling who doesn't believe the child at first about the strange things happening with the bed.
In a potential 'the monster bed story', the main character could be a little girl. She is the one who sleeps in the bed every night and is the first to notice the odd behavior of the bed. There could also be a friendly neighbor who has some knowledge about the history of the bed and helps the girl figure out what's going on. Another possible character could be a little pet, like a cat, that also senses the strangeness around the bed and stays close to the girl for protection.
The main character is usually a child. It's the child who experiences the fear of the monster under the bed.
Mostly, the main character is a child. It's often a young boy or girl who is the one afraid of the monster under the bed.
Typically, the main character is a child who is afraid of the monster under the bed.
In most cases, the central character is a young child. There might also be parents or siblings who are either part of the child's support system or who don't believe the child about the monster. For example, the parents might just think it's the child's overactive imagination, while the siblings could either tease the child or also be a bit scared themselves.
Since I don't know the exact 'yellow monster bed story', but generally it would have the yellow monster as a main character. There might also be a child who has the bed that the monster is associated with.
I don't know the details of 'the monster story', so I can't say for sure. But it could be the monster itself as a main character, and maybe a human who crosses its path.
Maybe it's a pet. The pet could sense the presence of something under the bed that the humans can't fully understand. It could be curious, scared or even protective, making it an interesting main character as it tries to figure out what the'monster' is.
Based on the title, the main characters are likely the man who is in her bed and the woman whose bed it is.
Obviously, the main character is the boy. But depending on the story, there could be other characters too. Maybe his parents if they are looking for him while he's under the bed. Or if it's a more adventurous story, there could be a pet that joins him under the bed, like a curious cat.
The main character is the woman who was in the abusive relationship. And her husband who was the abuser are the main characters.