Ms. Bitters is the antagonist of Invader Zim. She is a grouchy, negative, elderly, nihilistic and threatening schoolteacher who hates the smell of children.
| "Gee, this is harder than I thought."|
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|Characters||Zim • GIR • Dib • Gaz • Almighty Tallest • Professor Membrane • Ms. Bitters • Minimoose • Tak|
|Media||Episodes • DVDs • Comic book • TV movie|