Grandma is Ma’s mother. A deeply emotional woman whose daughter’s disappearance has shaped her life. Grandma is overjoyed to have Ma back in her life, and though she’s a little uncertain of how to navigate a relationship with the timid, eccentric Jack, she loves him very much. Grandma is imperfect—and sometimes a little dismissive of Jack’s peculiar needs—but at the end of the day she is a committed caregiver. A pragmatist in spite of her often outsized emotions, Grandma doesn’t believe in coddling or catering to Jack, and while it takes him a while to adjust to this treatment after he goes to live with her and Steppa, it soon becomes clear that Grandma has intuited all along Jack’s need for space to make mistakes, learn, and grow.