Who are the characters in "The Pit and the Pendulum"? And what are the key events that take place?

There is only one main character in The Pit and the Pendulum: the narrator. However, despite the fact that he is the main character, we know next to nothing about him. For more discussion on him, I have provided a link. There are some other people mentioned in passing such as the "black-robed judges,"  the people who carried him away from his sentencing, the inquisitorial agents, and the only named character: General Lasalle of...

There is only one main character in The Pit and the Pendulum: the narrator. However, despite the fact that he is the main character, we know next to nothing about him. For more discussion on him, I have provided a link. There are some other people mentioned in passing such as the "black-robed judges,"  the people who carried him away from his sentencing, the inquisitorial agents, and the only named character: General Lasalle of the French army who inadvertently saves the narrator at the end of the story. 

As for the key events:

• The narrator's sentencing


• His exploration of the cell


• His finding the pit


• The lights coming on to reveal what the cell looks like


• The narrator waking up to find that he is tied down and the pendulum is slowly coming down on him


• His escape from the restraints and the pendulum, and the paintings on the wall changing


• The walls slowly closing in on him


• General Lasalle stopping everything and inadvertently saving the narrator

That is just the bare skeleton of the story. For a fuller summary, I have provided a link.