An 11-year-old girl who is the oldest of the three Cruz sisters and joins Tyler's class at Bridgeport Elementary after moving from Mexico. She writes letters and diary entries that capture her experiences and concerns about her family's legal status in the United States.

Mari's playful and musical young uncle who works alongside his brothers on the Paquettes' farm. He faces legal troubles after a run-in with authorities, highlighting the precarious situation of undocumented workers.

Tyler's strong-willed grandmother who forms a bond with the Cruz family and learns from their cultural traditions. She actively supports the Cruzes during difficult times and seeks personal growth through her experiences.

Tyler's devoted parents who are determined to keep their dairy farm running. They prioritize the safety and well-being of the Cruz family, showing respect and care for them as valuable members of the farm community.

Mari's father who works on the Paquette farm and navigates the challenges of providing for his family while dealing with personal loss. He faces tensions at home but ultimately cares deeply for his family's future.

Mari's caring mother who shares a poignant history of crossing the border with her family. She experiences a journey fraught with challenges but remains a nurturing presence in her daughters' lives.