Who is Miss White from Teaching a Stone to Talk and what is their importance?

Miss White was a neighbor of Annie's while she was growing up in Pittsburgh. Miss White was old and lived alone across the street from Annie. She was kind and often tried to teach Annie new things, such as finger painting. One Christmas, Miss White dressed up like Santa Claus, which scared Annie, who thought that Santa Claus was God. Annie was also scared when Miss White accidentally burned her while showing her a magnifying glass. Miss White appears in "God in the Doorway".