Who is with granny weatherall, and what kind of a relationship does she seem to have with these characters?

Granny Weatherall - A woman who’s about eighty. After she was jilted at the altar by George, Granny Weatherall married John, who died young, leaving her with several children to care for. Granny, whose given name is Ellen, used to be a midwife and nurse. Meticulous by nature, she is annoyed by Cornelia’s and the doctor’s attempts to make her more comfortable.