Nora is a nine-year-old fifth-grader who is secretly a genius. She possesses an extraordinary memory and intelligence but hides her abilities by intentionally earning low grades to appear normal. She values ordinary friendships over academic prestige and uses her intellect to formulate plans to protect her friends from the intense pressures of standardized testing.

Stephen is Nora's best friend and classmate. He demonstrates a genuine love of learning early in life, but begins to struggle with his self-worth when fourth-grade standardized testing ranks him poorly. He is hardworking and kind, though he increasingly feels the negative weight of academic pressure and begins to distance himself out of insecurity.

Mrs. Byrne is the fair and open-minded school librarian. She pays close attention to her students and notices anomalies that other faculty miss. She serves as a rare, non-judgmental adult figure who listens to student perspectives regarding the pressures of the educational grading system.

Mrs. Hackney is the top teacher and principal of the elementary school. She is firm but professional, answering to the district superintendent while maintaining responsibility for the students' academic progress. She expects students to work to their full potential and enforces the school's structural standards.

Dr. Trindler is the school guidance counselor and psychologist. He takes a clinical interest in his students, preferring to analyze them through the lens of IQ tests and measurements. He places high value on academic and professional accolades, proudly displaying his own certificates across his office walls.

Nora, Ann, and Todd's parents place a massive emphasis on academic success. They hold their children to high standards, celebrate report card day with special dinners, and eagerly plan futures revolving around elite schools and gifted programs. Despite their intense focus on grades, they genuinely care for their children's well-being.

Ann is Nora's older sister by six years. She is the family's ideal student, earning perfect grades in honors classes while participating in multiple extracurricular activities and student government. She thrives on praise and easily accepts the prestige that comes with high academic achievement.

Todd is Nora's older brother, currently in the eighth grade. He represents the middle ground of the family's academic spectrum, earning solid but imperfect grades that leave room for his parents' constructive criticism.

Merton is a highly intelligent fifth-grader in the school's gifted program. Coming from a family of Ivy League graduates, he places immense value on his academic standing and frequently mocks classmates who earn lower grades or test scores.

Mrs. Noyes is Nora's fifth-grade homeroom teacher. She closely monitors her classroom and feels personal pressure when her students receive poor grades, reflecting the heavy burden standardized testing places on educators.

Mrs. Tersom is the school district's superintendent. She views the educational system from a high-level administrative perspective, believing that strict compliance and swift discipline are necessary to maintain academic excellence and order.

Charlotte is a well-meaning fifth-grade classmate. Believing that Nora is genuinely struggling with her classes and at risk of being held back, she kindly reaches out to offer tutoring.

Jenny is a fifth-grade classmate who enjoys spreading gossip. She invents a story about Nora's parents dragging her out of the principal's office in tears.