Homer Hickam (Sonny):The protagonist, driven by curiosity and a deep desire to pursue rocketry, Sonny is determined and inventive. He exhibits persistence, passion for science, and an unwavering commitment to his dreams. He's also portrayed as resourceful and resilient in the face of adversity.
Quentin Wilson (O'Dell): He is the brainy and analytical friend who contributes scientific knowledge and precision to their rocketry endeavors. Quentin is methodical, detail-oriented, and often serves as the voice of reason among the group.
Roy Lee Cooke: A charismatic and adventurous member of the group, Roy Lee embodies a sense of spontaneity and risk-taking. He's daring, charming, and adds an element of courage and enthusiasm to their rocket-building escapades.
Sherman Siers (Sherman): The more cautious and reserved member of the group, Sherman's role involves ensuring safety measures are taken during their rocket experiments.
Miss Riley: The boys' teacher, Miss Riley, plays a crucial role in supporting their scientific endeavors. She's encouraging, nurturing, and sees the potential in her students, fostering their curiosity and determination.
Homer Hickam Sr.: Sonny's father, a coal miner, initially opposes his son's interest in rockets due to practical concerns. He's hardworking, traditional, and stern but later begins to understand and support his son's passion.
Elsie Hickam: Homer's mother, who serves as a source of love and support, trying to mediate between Homer and his father.