Martha is Lidenbrock’s housekeeper. She is a dutiful servant, but she often worries about her employer’s eccentricities. At the beginning of the novel, she and Axel face Lidenbrock’s confusing behavior together, acting as the sensible counterpart to the eccentric professor. However, they respond differently to his more outlandish behavior. While Axel resigns himself to yielding to his uncle’s whims, Martha entreats Axel to make Lidenbrock see reason. He fails, and Lidenbrock locks himself, Axel, and Martha inside the house, refusing to let Martha visit the market to buy food. When Axel grows homesick over the course of the novel, he thinks of Martha as a fixture of his uncle’s house in Hamburg, and he misses her greatly.