Nancy, surname possibly being Duck, is a cousin of Donald Duck.
In her first and only appearence, Nancy comes to visit and spend time with her cousin, Donald Duck. That causes Donald's girlfriend, Daisy Duck, to become jealous and think that Nancy is Donald's girlfriend. In the end, the situation is cleared and Daisy apologies to Nancy and Donald.
Nancy appears to be a photographer.
Behind The Scenes
Nancy's only appearence was in the story written by Bob Gregory, released in March of 1973, called A Likely Story.