Rosa is a Macushi woman who speaks English and acts as the interpreter between her people and Tony Last and Dr. Messinger. She attributes her English knowledge to having “live[d] bottom-side two years with Mr. Forbes,” an unexplained reference. She consistently demands cigarettes from Dr. Messinger, and she frustrates him and Tony by insisting that her people will not accompany them to the Pie-Wie territory and must turn back.