who is the voice behind the character?
Brad Bird
Edna Mode
Bird also decided to voice the character himself 
is linda hunt the voice of edna in the incredibles No what show is this character from? She is a fictional character in Pixar's animated superhero film "The Incredibles"
wiki:5821410
Edna Mode [SEP] Introduction
Bird also decided to voice the character himself after several actresses originally considered for the role failed to replicate Edna's unique accent. The director understood that, in addition to fashion expertise, the character would need to demonstrate proficiency in science, engineering and technology in order to create costumes capable of withstanding the trials of superheroic activities, and ultimately conceived her as a short, confident character of both German and Japanese descent based on these countries' reputations as small yet powerful nations. Inspired by Q from the "James Bond" franchise, Edna is widely believed to have been based primarily on costume designer Edith Head, although there continues to be constant speculation as to which celebrities inspired Edna, particularly "Vogue" editor-in-chief Anna Wintour and actress Linda Hunt.