Captain Nemo-Captain Nemo is the main character in the novel. The gloomy and knowledgeable engineer is calm, calm and witty. In order to escape from the real world, he built a submarine and lived under the sea. He is afraid of everything in the real world, retaliates against human evil, and is willing to live that isolated life. But he is also a kind person. He can repay tens of billions of national debts for France, shed tears silently when his friends die, distribute millions of gold to the poor, and take in all those who hate the land.

Professor Pierre Aronnax, a French biologist, likes to observe all the animals and plants in nature. In order to track down a big monster, he mistakenly boarded the Nautilus. In the process of being captured by Captain Nemo, he was full of curiosity and exploration about the underwater world, introduced these marine creatures to us in detail, and told us all kinds of wonders he saw in the ocean one by one, which opened the eyes of readers. Pierre Aronnax is a typical scholar, and his knowledge is above everything else. He sacrificed his freedom in order to explore the mysteries of science.

Conseil is a loyal servant of Professor Pierre Aronnax. He is young, strong and steady. He never makes a fuss, but he is always so calm and easy-going. The most valuable thing is his loyalty to his master. When Professor Pierre Aronnax was accidentally thrown into the sea and his life was in danger, Conseil bravely jumped into the sea and swam with him until he was rescued. He is proficient in classification theory and always classifies everything seriously or solemnly.

Ned-a primitive man, a wild whaler. He will also admire the beauty of the polar regions, but what is more important to him is the steak, veal and wine in the pub and the free walk on the land. He has a bad temper and can't stand being imprisoned. He always intends to run away. Without him, Professor Pierre Aronnax and Conseil could not finally return to land.