Answer:
The character of Doctor Harry is "flat" because he is the character that is described from outside.
Explanation:
The Jilting of Granny Weatherall is a short story penned by Katherine Anne Porter. In this story, the character of Doctor Harry is the flat character.
The flat character in literature is the character that does not change from the start to end in the novel. This character also does not have any emotional depths in the story.
In the story, Doctor Harry's character is pictured from outside only. He is described as a kind man and to be ludicrously young by the Granny. In the characterization of Doctor Harry, no emotional changes occur.