An accountant who struggles with balancing work and family life after his younger son’s diagnosis.

An English teacher who dedicates herself to caring for her younger son after his diagnosis, often leaving Steven feeling overlooked.

Steven’s adorable and cheerful 5-year-old brother with blond ringlets, whose leukemia diagnosis deeply affects the family.

Steven’s empathetic friend and fellow eighth grader in the jazz band, who is a talented pianist with a goal to audition for Juilliard.

The popular girl Steven has admired since third grade, who begins to recognize Steven after his family's challenges.

A cancer patient that Steven meets at the Children’s Hospital, who shares a similar diagnosis with Jeffrey.

Steven’s school counselor who becomes an important support figure once Steven opens up about his brother’s illness.

Steven’s caring English teacher, who offers her students privacy in their journal entries and shows concern for Steven.

Steven’s band teacher and the director of the All-City Jazz Band, who supports Steven’s drumming talent.

Steven’s supportive drum teacher, who has been giving him private lessons for over five years.

A high school sophomore guitarist in the jazz band, who is also Renee’s boyfriend.