Final answer:
Mr. Framton Nuttel is the protagonist of The Open Window by Saki. He is the main character who becomes entangled in a practical joke during his visit to the country for his health, making him a central figure in the story's plot and irony.
Step-by-step explanation:
In the story The Open Window by Saki, Mr. Framton Nuttel is the protagonist. He is the central character who visits the country to seek a cure for his nervous condition and becomes a victim of a practical joke orchestrated by a young girl named Vera. Contrary to being the storyteller or a secondary character, Mr. Nuttel is the one through whose experiences the readers are introduced to the events and the ironic twist of the narrative. Neither is he the antagonist, as he does not actively oppose any other character; rather, he is subjected to the deceptive story told by Vera.
This story offers a fine example of viewpoints and narrators, where Saki has chosen a third-person perspective that allows readers to observe Mr. Nuttel's reactions without delving into the inner thoughts of other characters. Thus, placing Mr. Nuttel in the role of the protagonist shapes the story’s direction and its outcome.