Final answer:
In "Our Town" by Thornton Wilder, Rebecca Gibbs is not one of the audience members who speaks to the Stage Manager. The characters engaging with the Stage Manager in this manner are Professor Willard, Mrs. Webb, and Mr. Webb.
Step-by-step explanation:
In Thornton Wilder's play Our Town, the character who is not one of the people to speak from the audience is Rebecca Gibbs. The play utilizes a unique theatrical device where the Stage Manager is directly engaged by certain audience members who are, in fact, actors themselves. This technique helps to establish exposition and develop the setting of the experimental play which breaks the fourth wall. However, the characters that speak from the audience as plants are Professor Willard, Mrs. Webb, and Mr. Webb. Joe Crowell, Emily Webb, and George Gibbs are characters within the town, but they do not have roles where they directly question the Stage Manager from the audience.