To Hotel Denouement Fire (Possibly)
- "I'm so hungry I could eat a dekagram of rice."
- —Mrs. Bass in The Penultimate Peril
Mrs. Bass loves the metric system. Each day she made students measure anything she could find. Then she had them call it out in class. She thinks that Klaus is very smart and nice as she states so in The Austere Academy, when giving out hard tests to Violet and Klaus.
She returns in The Penultimate Peril at Hotel Denouement. She turns against the Baudelaires, accusing them of bank robbery. It is not clear if Mrs. Bass escapes the fire at the hotel, however, it is possible she did because in The Austere Academy, Lemony Snicket states that Prufrock Preparatory School closed after she was arrested for robbing Mr. Poe's bank. Some theorize she stole the Baudelaire Fortune.