Son Goku, born Kakarot, is a Saiyan raised on Earth and the main protagonist of the Dragon Ball series. He is the secondborn, as well as youngest child and son of Bardock and Gine, the little brother of his saiyan brother Raditz, the husband of his wife Chi-Chi, and the father of his two sons: Gohan and Goten. Originally sent to Earth by his parents as an infant, Kakarot was adopted by Grandpa Gohan and renamed Son Goku. A head injury at an early age altered Goku's memory, ridding him of his initial destructive nature and allowing him to grow up to become one of Earth's greatest defenders. Goku constantly strives and trains to be the greatest warrior possible, which has kept the Earth and the universe safe from destruction multiple times.