Kino is a fisherman that is married to Juana. Day he finds a giant pearl that could potentially make him rich. But he becomes suspicious of everyone in the town because he thinks that they will steal his pearl.
Juana is the wife of Kino and the mother of Coyotito. When Coyotito gets stung, Juana goes to action and tries to suck out the venom so that her child would survive.
The Priest only went to see Kino and his child when he finds out that Kino found the biggest pearl in the world.
The Doctor at first doesn't talk to Kino and Juana because of their race, but when Kino finds the pearl, the doctor goes to their house and poisons Coyotito to get more money from Kino and Juana.
Coyotito is the son of Kino and Juana. He gets stung by a scorpion and when he is brought to the doctor, the doctor refuses to see him because of his race.
Juan Tomas is the brother of Kino and is loyal to his brother even when Kino finds the pearl. He is married to Apolonia.