Who is Aunt Em?

Aunt Em is the wife of Uncle Henry. Both she and her husband are the foster parents of Dorothy Gale. Dorothy is presented as an orphan in the Oz book series by Lyman Frank Baum [May 15, 1856-May 6, 1919]. In the book, it isn't specified to which of her foster parents Dorothy is related. But later on in the series, readers may be given the idea that the blood ties are with Uncle Henry. For example, he tells Dorothy that like mother like daughter, Dorothy is a dreamer.
Aunt Em is the wife of Uncle Henry. Both she and her husband are the foster parents of Dorothy Gale. Dorothy is presented as an orphan in the Oz book series by Lyman Frank Baum [May 15, 1856-May 6, 1919]. In the book, it isn't specified to which of her foster parents Dorothy is related. But later on in the series, readers may be given the idea that the blood ties are with Uncle Henry. For example, he tells Dorothy that like mother like daughter, Dorothy is a dreamer.