Captain Nemo is a main character in 20.000 Leagues under the Sea and the captain of the Nautilus.
Description[]
"The second stranger merits a more detailed description. A disciple of Gratiolet or Engel would've read his face like an open book. I made out prevailing qualities directly:-self-confidence, because his head was set well on his shoulders, and his black eyes looked around with cold assurance; calmness, for his skin, rather pale, showed his coolness of blood, energy,- evinced by the rapid contraction of his lofty brows; and courage,- because his deep breathing denoted great power of the lungs.
Whether this person was thirty-five or fifty years of age, I could not say. He was tall, had a large forehead, straight nose, a clearly cut mouth, beautiful teeth, with fine taper hands, indicative of a highly nervous temperament. This man was certainly the most admirable specimen I had ever met. One particular feature was his eyes, rather far from each other, which would take in a quarter of the horizon at once."---Jules Verne, Twenty Thousand Leagues Under The Sea, Chapter VIII; Mobilis in Mobili