Joanna is a recurring character, who first appears in "Petergeist" and then later on in "Movin' Out (Brian's Song)". She works in a library and is invited to a surprise party Stewie organized for Brian. She is known to have a very annoying way of laughing and usually laughs at her own jokes. However, she is gets along well with Stewie, who took an instant liking to her upon their first encounter.

In "Cat Fight", Joanna eats at The Barista-Cats with Bruce and jokes that if she has nine lives, she'd have an easier time finding a man.

In "Short Cuts", she shops at Goldman's Pharmacy. Her employment is also confirmed to be the Quahog Public Library.

Joanna is voiced by Alex Borstein.

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