Dickie is a perceptive, curious twelve-year-old boy who asks keen questions about the natural world, such as how grass grows and the distance to the sun. Uninterested in the flashy comic books he is given, he prefers to understand his environment. He possesses a nervous manner and strongly desires harmony in his home. His trusting nature leaves him oblivious to the true stakes of his mandatory Government Intelligence test.

Mr. Jordan is a gruff, outwardly stoic father who heads his mid-century-style household. He attempts to manage his extreme anxiety by maintaining strict emotional control, preferring to shake hands with his son rather than embrace him. He reads the official state newspaper and deliberately discourages his son's intellectual curiosity. When asked scientific questions, he provides short, incorrect answers to stop further conversation.

Mrs. Jordan is an anxious mother who acts as the primary emotional center for her small family. She prepares her son's birthday cake and wraps brightly colored packages while struggling to hide her fear about the upcoming examination. Though she tries to compose her face into a misty smile to reassure her son, she cannot entirely conceal her distress. She finds it difficult to maintain the stoic facade her husband demands of her.

The Government is an omnipresent, authoritarian bureaucracy that controls all information and media in society. It operates from a massive, pillared building with marble floors, relying on nameless clerks in tunics to process citizens. It mandates that all twelve-year-old children consume a truth serum and undergo a rigid intelligence evaluation. The institution uses cold, mechanical regulations to enforce total conformity across the population.