Giselle Mahmoud is Materia's mother. She is the first Mahmoud to have contact with James Piper when he comes to tune their piano. She chats with him in Gaelic because she does not know English and reads his tea leaves. She accurately predicts James' future, seeing a daughter, a house and water, but also sees something in the cup that troubles her. Giselle never tells anyone what she saw but remembers it when she attends Kathleen's funeral.