What was the primary function of the Whisperer?

The primary function of the Whisperer in "The Mysterious Benedict Society" is indeed to transmit and perceive thoughts in alignment with Mr. Curtain's presence. This character operates as a key tool for Mr. Curtain, serving to enhance his control over the other characters and the overarching narrative. The Whisperer has the ability to gather information, effectively acting as a conduit for thoughts and ideas, which plays a crucial role in the plot as it contributes to Mr. Curtain's manipulation of his surroundings and the children involved in the Institute.

By being able to perceive thoughts, the Whisperer also provides Mr. Curtain with insights into the minds of the other characters, allowing him to anticipate their actions and reactions. This ability reinforces the themes of manipulation and control that are central to the story. The effectiveness of the Whisperer as a character demonstrates how information and communication can be wielded as powerful tools in the context of the narrative.