Alberta Fromme is known as the neighborhood cat lady.
She lived either on Wisteria Lane or on a street nearby, as it was never determined. In season 1 she asked if Susan could watch her cat Mr. Whiskers while she was out of town. She was seen at many neighborhood parties and functions, and appeared to be friends with Ida Greenberg and Karen McCluskey. She has not been seen or mentioned since season 3, so it is assumed that she has either moved away or died during the five year jump between seasons 4 and 5.