Tío Mayo is one of Mami’s older brothers who was put in charge of caring for his much younger sister after Titi Aurora married. He was a violent and exacting caregiver and often beat Mami, which Mami resents him for. He saw Mami as trouble. However, as an adult, Mami sees that he was just doing his best in a difficult situation, and fortunately, he did send Mami to school.