Otto Lidenbrock is a fictional character from the novel "A Journey to the Center of the Earth," written by Jules Verne. He is a passionate and determined professor of mineralogy at the University of Hamburg. Lidenbrock discovers an ancient manuscript that leads him to embark on an adventurous expedition to explore the Earth's interior. Throughout the story, Lidenbrock is characterized by his enthusiasm for science and exploration. He is often impulsive and stubborn, which drives the plot forward as he leads his nephew, Axel, and their guide, Hans, on a thrilling journey filled with challenges and discoveries beneath the Earth's surface.