The narrator in "The Lady or the Tiger?" adopts a forthright tone, one that is directly frank and without hesitation, throughout the majority of the story. At the beginning of the tale, as the narrator describes the semi-barbaric king and his "florid fantasies," the narrator's tone is not judgmental or critical of the king's practices, but rather assesses them for what they are and continues to describe the events in interesting detail.
It is important to note that the forthright tone of the narrator shifts to a more sympathetic tone as the poor, heroic youth enters the arena. Here the narrator's diction emphasizes the reaction of the crowd to seeing the handsome youth for the first time:
"Tall, beautiful, fair, his appearance was greeted with a low hum of admiration and anxiety. Half the audience had not known so grand a youth had lived among them. No wonder the princess loved him! What a terrible thing for him to be there!"
The sympathetic tone of the narrator in this passage draws the reader in and builds on the emotion of the moment.
Stockton's use of tone, from forthright to sympathetic, increases the emotional quality and context of "The Lady or the Tiger?"
it would be suspense really, because we are not told who he choses at the end of the story...and i guess it could also be fear, but as for a quote, i'm sorry but can't help there