Maggie is an 18-year-old girl who has relocated to a small Southern town after witnessing her father murder her mother. She copes with her severe trauma by refusing to speak, which socially isolates her at her new high school. Despite her silence, she is highly observant and sensitive to how her presence affects her cousin Brady's social standing. She feels like an outsider in Lawton but possesses a deep empathy for the emotional pain of others.

West is an 18-year-old popular football star at Lawton High School who masks his internal distress with drinking and casual relationships. He secretly struggles with the impending loss of his father to cancer, keeping the diagnosis hidden from his friends and teammates out of fear. Overwhelmed by grief, he finds unexpected comfort in confiding in the new, silent girl in town because he knows she cannot spread his secret.

Brady is an 18-year-old high school senior and football player who has lived in Lawton his entire life. When his traumatized cousin Maggie moves in, he acts overprotective and controlling, fearing she will disrupt his normal social routine. Despite his initially harsh boundaries, he cares deeply about his family and is fiercely loyal to his best friend, West.

Coralee and Boone are Brady's parents and Maggie's aunt and uncle. They provide a stable, nurturing home environment for their traumatized niece. They respect Maggie's boundaries, accept her silence without pressure, and act as a steadying presence as she adjusts to her new life in Alabama.

Jude is West's father and Olivia's husband, currently battling terminal cancer. He shares a deep bond with West over their mutual love of football and has always been his son's biggest supporter. His rapid physical decline heavily affects West, driving much of the teenager's emotional distress.

Olivia is West's mother, who struggles to maintain a cheerful facade while her husband fights cancer. She has been in love with Jude since they were teenagers and faces immense grief over his illness. She relies heavily on West for emotional support while trying to keep her family intact.

Nash is a football player at Lawton High School and one of Brady and West's teammates. He shows unexpected kindness to Maggie when she is bullied at school, intervening to help her with her locker. He attempts to strike up a friendship with her despite Brady's strict warnings to stay away.

Raleigh is West's girlfriend at the beginning of the novel. She is unaware of West's family struggles and is eventually pushed away as West isolates himself and grows closer to Maggie. She becomes jealous and hostile when she notices West's developing attachment to the new girl.

Serena is a student at Lawton High School who pursues a casual physical relationship with West. West uses her as a distraction from his father's illness, but her presence causes friction and misunderstandings between West and Maggie.

Gunner is one of the football players in Brady and West's friend group. He participates in the typical high school gossip and banter, casually spreading rumors he hears from his mother about Maggie's traumatic past.

Ryker is another football teammate of West and Brady. He actively participates in the school's rumor mill, insisting to his friends that Maggie is mentally unstable because of her silence.

Ivy is a high school student in Lawton and dates Brady. She is part of the established high school social circle that Maggie initially avoids.

Asa is a member of the football team who hangs out with West, Brady, and Nash. He makes insensitive jokes about Maggie's silence alongside his peers.

Charlie is a student outside the main football circle who shows polite interest in Maggie. He asks her out, offering her a brief glimpse of normal teenage interaction, though Brady and West quickly interfere.

Jorie is Maggie's godmother who cared for her immediately following the tragedy. When she is no longer capable of caring for Maggie, Maggie moves to Lawton.

Maggie's late mother is a haunting presence in Maggie's memory. Her violent death at the hands of Maggie's father is the root of Maggie's selective mutism. Maggie remembers her as a comforting figure and deeply grieves her loss.

Maggie's father is currently incarcerated for the murder of Maggie's mother. His violent actions completely shattered Maggie's life, prompting her to stop speaking out of fear that her voice will release the horrific memories of what he did.