The most important character is Meursault, the protagonist. He is a detached and rather strange individual. His actions and reactions throughout the story are central to the plot. Then there is Marie, his girlfriend. She represents a connection to the normal world that Meursault has, but he still remains somewhat aloof from her.
There's Raymond, Meursault's neighbor. He's involved in some seedy activities and drags Meursault into his affairs to an extent. His presence shows another aspect of the seedy and morally ambiguous side of the society in which the story is set. And Meursault's mother, even though she is dead at the start, her death and Meursault's reaction to it are crucial elements that define his character.
Valentine Michael Smith is the most important character. He is a human born on Mars and brought back to Earth. His unique upbringing shapes his views and actions on Earth. Another important character is Jill Boardman. She is one of the people who helps Smith adapt to Earth and also becomes romantically involved with him.
The protagonist is a very important character. His actions and his strange way of thinking drive the whole story. And then there is the Arab. His presence and the interaction with the protagonist are crucial as it leads to the major event in the story, which is the murder. Also, the magistrate who tries to understand the protagonist during the trial is an important character as well.
In 'the stranger novel', the central character is Meursault. He is a character who stands out for his lack of conventional emotions. His actions are often based on impulse rather than following social norms. Besides him, there are characters like Raymond, who is involved in some rather seedy activities and whose relationship with Meursault reveals more about Meursault's character. And then there is Marie, who has a relationship with Meursault but even that relationship is rather strange as Meursault doesn't seem to have the typical feelings associated with it.
I don't know as I haven't read the book. But usually in a novel titled like this, there would be the perfect stranger as one of the main characters, and probably someone whose life gets intertwined with the stranger, like a protagonist who is affected by the stranger's presence.
I'm not sure which Coben novel this is exactly, so I can't name the main characters. But usually in Coben's novels, there are characters who are either in a difficult situation or are on a journey to discover something.
Jack Sparrow is one of the main characters. He is a well - known pirate. There are also other pirates and some characters from different groups who are involved in the quest for the Fountain of Youth.
There could be a reclusive character who is suddenly confronted by this perfect stranger. This reclusive character might be the focus, and the story could be about how they are forced out of their shell by the stranger. Additionally, the perfect stranger themselves could be a complex character with a mysterious past and motives, and their actions and words would be central to the story. There might also be a nosy neighbor type of character who adds some comic relief or extra drama as they observe the interactions between the protagonist and the stranger.
I'm not entirely sure without having read it specifically, but it could be a lone traveler as the main character, someone who is on a journey and is a stranger everywhere they go.
Well, of course, the mysterious stranger himself is a main character. He's the one who drives much of the plot with his enigmatic presence. There are usually other characters like the local villagers or townspeople who interact with him. Maybe there's a young protagonist, a curious soul who is determined to uncover the secrets of the stranger.
I don't know for sure as I haven't read the book. But usually, there would be the people who live in the house. Maybe a family like a husband, a wife, and their children. And of course, the stranger who enters the house.