Since I haven't read it, I can't say for sure. But it could be a herpetologist who is interested in the green mamba.
It's possible that the main character is the green mamba itself, with the story told from its perspective. Or perhaps there is a group of researchers or conservationists who are trying to protect the area where the green mamba lives.
I'm not sure specifically as I haven't read this short story. But generally, it might be about the green mamba, perhaps its life in the wild, its encounters with other animals or humans, or it could center around a character's experience with a green mamba.
I'm sorry, as I haven't read the full story of 'The Green Mamba' by Roald Dahl, I can't say for sure who the main characters are.
I don't know for sure, but I assume the green bird is one of the main characters. There might also be a person who discovers the green bird, like a shepherd or a little girl.
Since we don't have more details about 'the green door short story', it's hard to say exactly. However, it's common for there to be a protagonist, let's say a person with a sense of adventure and a thirst for discovery. This character would be the one whose actions and decisions revolve around the green door. There might also be an antagonist, although not always. It could be someone who tries to stop the protagonist from opening the green door or someone who has a different view on what the green door represents.
Since I don't know the specific story, I can't say for sure. But it could be characters who are environmentalists if green represents nature in the story, like a young activist and an old - wise tree - keeper.
Without reading the story, it's impossible to say for sure. But it could be a single protagonist, perhaps a young artist who finds inspiration while sitting in the green armchair. Or it could be a group of friends who gather around the armchair for their meetings and discussions, and through their interactions, the story progresses.
I don't know as I haven't read it, but it could be the person who owns the green blazer. There might also be other characters like friends or family members who interact with the blazer - owner and influence the story in some way.
Since I don't know the exact story, it could be the Green Man himself as the main character. There might also be some side characters like villagers or other mythical beings that interact with the Green Man.
In this short story, the Green Man is surely one of the main characters. He might be joined by a group of characters. For example, there could be a group of villagers who are initially afraid of the Green Man but then come to understand him. There could also be a magical creature, like a talking fox or a wise owl, that befriends the Green Man and helps him in his quest, whatever that may be.
I'm not sure as I haven't read the specific story, but it could be a young girl who wears the green ribbon. Maybe she is the main focus.