Question: what happened to the quagmire twins?
Answer: However, they are killed in a fire that consumed the Quagmire house, just as another consumed the Baudelaire house. Two of the Quagmire children — Isadora and Duncan Quagmire (played by Avi Lake and Dylan Kingwell) — seem to be the only survivors of the fire and are sent to the same school as the Baudelaires.