I don't know the specific main characters as I haven't read it. But usually, in such novels, there would be a detective - type character to solve any mysteries, a wealthy passenger who might be involved in some sort of trouble, and a train conductor who has knowledge about the train and its passengers.
The main character is Hercule Poirot, the brilliant detective. And there are the various passengers on the Orient Express, like Ratchett, who is the murder victim.
Hercule Poirot is one of the main characters. He is the famous detective who is on the Orient Express and has to solve the murder mystery. Another important character is Ratchett, the victim of the murder.
There is also Mr. Ratchett, the victim of the murder. His mysterious past plays a big role in the story.
I'm not entirely sure as I haven't read this specific novel. But generally, it might involve some adventures and mysteries that occur during a night on the Orient Express train, perhaps with a diverse cast of characters and some sort of intrigue.
It's a mystery-filled story set on a train. There are various characters with hidden agendas and secrets that unfold throughout the journey.
Colonel Arbuthnot is also among the main characters. He is a military man, and his relationship with some of the other passengers and his actions during the investigation play an important role in uncovering the truth about the murder on the Orient Express.
Hercule Poirot is a main character. He is a famous detective with brilliant deductive skills.
I think Mary Debenham is quite memorable. She is a calm and composed young woman, and as the story progresses, we find out she has her own connection to the case which makes her an important character.
The character of Ratchett is crucial. He is the victim, but as the story unfolds, we learn that he is not as innocent as he might first appear. His past actions seem to have led to his untimely death on the train. All the characters' backstories and relationships play a vital role in making the plot of 'Murder on the Orient Express' so engaging.
The main character is Hercule Poirot. He is a famous detective with remarkable intelligence and powers of deduction.