Larsen draws from her medical background in Passing to create the character of Brian, a doctor and husband of the main character. Larsen describes Brian as being ambivalent about his work in the medical field. Brian's character may also be partially modeled on Larsen's husband Elmer Imes, a physicist. After Imes divorced Larsen, he was closely associated with Ethel Gilbert, Fisk Director of public relations and manager of the Fisk Jubilee Singers, although it is unclear if the two married.
