Lady Casaubon was the Anthium delegate in the peace conference between her race and Zerugma at Castle Extremis. She was extremely old and frail, and her aide, Stellman, regularly helped her around. When Extremis was attacked from the mirror at the ceremony to officially open the negotiations, she was held captive by General Orlo, but was eventually rescued by Stellman. (PROSE: Martha in the Mirror)

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