Jack Potter is the town marshal of Yellow Sky and recently got married in San Antonio. He is nervous about how he believes the townspeople will react to his marriage but excited to have a new wife. Jack works outside a lot and is knowledgeable about trains. He considers the townspeople his friends. They respect him and know that he will keep them safe.
Jack's bride is a plain woman from San Antonio. She is used to living in the West, and she is a good cook. She is excited about her new marriage and life with Jack.
Scratchy Wilson is experienced with guns. He also frequently gets drunk and is violent when he does. He and Jack consider themselves enemies. The reader finds by the end of the story that their relationship is more complicated than that of just enemies. He wears a red shirt and carries two guns.