Kino is the father of Coyotito and husband of Juana. He works as a pearler, like many of the people in his village, to try to provide for his family. He views everything as a song, such as the Song of the Family and the Song of Evil.
When Coyotito was stung by the scorpion, Kino realized he did not have enough money to support his family. After finding the "Pearl of the World", we see that Kino is the type of person to hope too much for stuff and let the money get to his head, unlike his wife, Juana.
Juana is the wife of Kino and the mother of Coyotito. she's a kind and quiet woman and loves her family and does everything she can to save Coyotito when he's stung by the scorpion,