In 'The Man from Earth', the central figure is John Oldman. He's the key as he holds the secret of his long existence. His friends like Dan, Edith, Sandy, etc. are also important characters. They are the ones to whom John discloses his incredible story. Their reactions range from disbelief to acceptance, and their interactions with John form the core of the story as they all grapple with this mind - boggling revelation.
The main character is the man from earth, of course. And his colleagues who he tells his story to are also important characters. They play the role of the audience within the story, reacting to his extraordinary claims.
The main character is the man from earth who is immortal. There may be other characters he interacts with in different time periods, but he is the central figure.
The main character is Zac Hobson. He is the central figure around whom the story revolves. He wakes up to find himself alone in a world that has changed drastically.
In 'man from earth original story', the most important character is John, the man who claims to be 14,000 years old. Among his friends, Dan is a significant one. Dan is rational and scientific - minded, so he tries to find flaws in John's story. Edith is a female friend who has a certain emotional connection to John. And Sandy, who is also part of the group, adds different perspectives to the discussions that occur after John's revelation.
It's about a man who claims to be a Cro - Magnon (a prehistoric human) who has survived for thousands of years. He has to keep his true identity a secret while living among normal humans. His long life has given him a vast amount of knowledge and experiences from different eras.
There's Griffin, of course. He is a complex character who starts out with a thirst for knowledge and ends up a power - hungry and desperate man. And then there are the people he interacts with, like Dr. Kemp. Dr. Kemp becomes involved in Griffin's story when Griffin reveals his invisibility to him.
Well, I'm not entirely sure without reading the story specifically, but usually in a science fiction story like this, there would be a protagonist. This protagonist is likely to be at the center of the action, driving the plot forward with his or her goals and desires. Maybe it's an ordinary person thrust into extraordinary circumstances.
There are quite a few main characters. Juliana is a central figure. She is brave and her journey through the story is crucial. Frank is not only an artist but also a man with a strong will. He has to deal with the oppression in different ways. Mr. Tagomi is interesting as he represents the Japanese side of the ruling powers but has a more complex personality, often questioning the values of his own side.
The Illustrated Man himself is a main character. His body is covered with tattoos that tell different stories. There might also be other characters who interact with him, like those who are intrigued or frightened by his tattoos, but without more specific information about this particular 'Christian Science Fiction' version, it's hard to name more characters precisely.
Obviously, the man from earth is key. But in the hidden story, there could be antagonists or allies that we haven't met in the main story. Maybe there are other immortals or those who are after his secret. And then there are his friends from the present time in the original movie, and some of them might have a deeper connection to the hidden story than we initially thought.