Alice’s father, who suffered from alcoholism for most of her life. After he crashes the family car while driving drunk, killing Alice’s sister, Anne, and mother, Sarah, Peter spirals deeper and deeper into alcoholism. Alice only occasionally visited her father when he was alive. He was always drunk and belligerent, and frequently forgot who she was, leading her to believe that he is the parent who passed on the mutated gene that caused her Alzheimer’s. Peter died from liver disease about a year before Alice receives her diagnosis.