Conversation so far:
When did The Muppet Show first air?
She spawned a huge fad during the late 1970s.
What was this fad like?
Miss Piggy's personality and voice were seen and heard in other female characters performed by Frank Oz before the character's debut.
Who voiced Miss Piggy?
CANNOTANSWER.
What was the show about?
CANNOTANSWER.
What else can you tell me about Miss Piggy's role?
Miss Piggy began as a minor chorus pig on The Muppet Show, but gradually developed into one of the central characters of the series.

Question: What was her character like?
Self-contained rewrite: What was Miss Piggy's character like on The Muppet Show?