What are the main characters in 'The Green Mamba' by Roald Dahl?

The Green Mamba is a story full of mystery and adventure. However, without having the specific text in front of me, it's hard to give a detailed summary. Generally, Dahl's stories often involve unique characters and unexpected plot twists.

The main characters are a mother, her daughter, and the umbrella man.

I'm not entirely sure as I haven't read it recently, but Dahl usually creates very distinct characters. There might be a character who is quite naive and thinks something is a piece of cake in the story.

The main character is a young man who is a bit naive and trusting. The landlady seems sweet and kind at first, but she's actually very creepy and has a dark side. She's the kind of character who gives off a false sense of security.

The main characters are the umbrella man, a mother and her daughter.

Well, there are many. For example, in 'Matilda', Matilda Wormwood is the main character. She is a very smart girl. In 'The BFG', there is the Big Friendly Giant and Sophie. Sophie is a little girl who befriends the BFG. And of course, in 'Charlie and the Chocolate Factory', Charlie is the central figure who gets the golden ticket to enter the factory.

Charlie Bucket is a main character from 'Charlie and the Chocolate Factory'. He is a kind and poor boy who gets a chance to visit Willy Wonka's amazing chocolate factory.

There are also other important characters like Willy Wonka in 'Charlie and the Chocolate Factory' who is the eccentric owner of the chocolate factory. These characters are all very memorable and add to the charm of Dahl's stories.

I'm not entirely sure as I can't remember all the details, but there are likely some characters involved in the act of bullying and the victim, maybe related to the swan in some way.

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.