Isadora Quagmire is one of the three Quagmire triplets. She, along with her twin brothers Duncan and Quigley, were orphaned after their parents were killed in the Quagmire fire. Caught in a similar plight to that of the Baudelaires, the Quagmires are heirs to a large fortune of the Quagmire sapphires, which Count Olaf is determined to claim for himself. He captures Duncan and Isadora at the end of The Austere Academy and keeps them in his clutches until the end of The Vile Village, where they escape with Hector in his Self-Sustaining Hot Air Mobile Home. After the home crashes, Isadora's fate is left ambiguous.