Mom is Aza's mother. She's a math teacher at Aza's high school and is a widow—Aza's dad died of a heart attack about eight years before the beginning of the novel. Although Mom does everything she can to help Aza, such as encouraging her to go to therapy and asking her about her sessions, she doesn't truly understand Aza's anxiety. She encourages Aza to "just not think about" whatever triggers her thought spirals and continues to ask Aza about her mental state, even though neither of these things helps Aza at all and sometimes even makes Aza feel worse. Nevertheless, Aza and her mother are very close and have a mutually respectful relationship.