Answer:
Nemo's appearance through detailed descriptions in the text. For example, we learn that the narrator believes him to be full of self-confidence, ''because his head was well set 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 lungs.''
Nemo's appearance is so striking that the narrator cannot tell if he is 35 or 50. The description continues: ''He was tall, had a large forehead, straight nose, a clearly cut mouth, beautiful teeth, with fine tapered hands, indicative of a highly nervous temperament.'' The narrator is clearly taken with him, calling him the ''most admirable specimen I had ever met.''
Of note are Nemo's eyes, which are described as being ''rather far from each other.'' The trait, it was determined, was to give the Captain a great range of vision so that he could see far distances and even ''read the very depth of the seas.''Nemo is a bit of an odd duck, a man with a bright scientific mind but a loner. He enjoys being alone so much that he crafted and captained a submarine that trolled the sea deep beneath its surface. Yet, he's a man who knows what he believes, exclaiming at one point, ''I am not what you call a civilized man!''
Because he prefers to live his life solo, adding that he is ''done with society entirely,'' he thinks he is also no longer subject to the rules that govern everyone else.
Nemo's strangeness can also be seen in an illustration of how he deals with deaths of his crew members, choosing to bury them deep beneath the sea rather than returning to dry ground. In many ways, between Nemo's solitary lifestyle and his refusal to go back to land, it's as though he's scared or hiding from reality.
Nemo's beliefs about society extend beyond simple fear or phobia to a real disdain for powerful empires. In a later book by Verne, we learn that Nemo is an Indian Prince named Dakkar who fought in a war against the British, a war that cost him his wife and children. As a way of protecting himself, perhaps, he retreated to the sea where he took out his vengeance in his own way, such as battering British warships in his path. It is likely that painful secret from Nemo's past caused him to become cold and hard as he aged.
Step-by-step explanation: