Carver is a seventeen-year-old student at Nashville Arts Academy who aspires to study creative writing in college. He is the sole surviving member of the tight-knit friend group known as "Sauce Crew." He suffers from severe survivor's guilt and sudden panic attacks because he texted the driver right before the fatal accident. Carver isolates himself in his grief, relying heavily on imaginary conversations with his deceased friends rather than confiding in his family.

Jesmyn is a talented pianist starting her first year at the Nashville Arts Academy. She is the girlfriend of the recently deceased Eli. Jesmyn shares a deep bond of grief with Carver and provides companionship to him when he feels entirely alone at school. She is adopted, Filipina, and fiercely dedicated to her musical goals, including a future audition for Juilliard.

Judge Edwards is Mars's demanding and influential father. He publicly calls for the district attorney to investigate Carver for criminally negligent homicide. He holds extremely strict expectations for his son's behavior and reputation, which creates a vast emotional distance between them.

Callum is a college English professor and Lila is a physical therapist. They are protective parents who quickly recognize the severe legal danger their son faces after the accident. They are willing to remortgage their house and exhaust their financial resources to hire a top-tier defense attorney.

Georgia is Carver's older sister, preparing to leave for her freshman year of college. Having managed her own depression and eating disorder in the past, she easily recognizes Carver's panic attacks. She insists he seek professional help and acts as a grounded source of support when Carver refuses to open up to their parents.

Blake is a deceased member of the Sauce Crew who planned to pursue comedy and screenwriting in Los Angeles. He was known for his YouTube channel featuring public fart pranks, treating humor as a legitimate form of performance art. He lived with his grandmother because his birth mother's addiction issues left her unable to care for him.

Nana Betsy is Blake's religious, traditional grandmother who raised him since he was eight years old. She explicitly refuses to blame Carver for the accident and offers him early, vital reassurance. She introduces the concept of dedicating a day to honoring a lost loved one through shared activities and stories.

Eli is one of Carver's deceased best friends. He was a gifted guitarist who planned to attend the Berklee College of Music after high school. He leaves behind his twin sister and his girlfriend, Jesmyn. His artistic energy and hidden thoughts about the world surface as his loved ones attempt to process his absence.

Dr. Pierce Bauer and Dr. Melissa Rubin-Bauer are Eli and Adair's parents. They are atheists who encourage constant intellectual debate in their household. The sudden loss of their son places heavy strain on their marriage, as they struggle with their own private guilt over the educational choices that led to the crash.

Mars is the third deceased member of Sauce Crew and the driver during the fatal crash. He dreamed of becoming a comic book illustrator, a path completely at odds with his strict father's expectations. He was actively responding to Carver's text message when the accident occurred.

Dr. Mendez is a professional therapist who helps Carver manage his severe panic attacks and survivor's guilt. He prescribes anti-anxiety medication but insists heavily on the value of talking through the trauma. He guides Carver to recognize the danger of assigning blame to random tragedies.

Adair is Eli's surviving twin sister. She channels her intense grief into anger directed entirely at Carver, viewing him as directly responsible for her brother's death. She makes her hostility clear in public spaces and actively seeks a target to focus her pain.

Jim Krantz is a defense attorney hired by Carver's parents. He explains the laws surrounding criminally negligent homicide and instructs Carver strictly on how to handle police questioning and media inquiries.

Darren Coughlin is a reporter for the Tennessean who aggressively questions Carver about his text messages and a possible criminal investigation. His journalistic presence adds immediate public pressure to Carver's private grief.

Mitzi is Blake's biological mother and Nana Betsy's daughter. Her struggles with addiction made her unable to care for Blake. This resulted in her mother taking custody of him when he was eight years old.

Jack Holder is Jesmyn's adoptive father. He briefly meets Carver before a hangout, which establishes the supportive family environment Jesmyn comes from in Jackson, Tennessee.

Dearly is a successful musician whose work deeply resonates with Jesmyn. His songs address themes of loss, which turns his concert into a deeply emotional experience for the grieving teenagers.