Son Goku born Kakarot is a Saiyan raised on Earth and the main protagonist of the Dragon Ball series He is the second born as well as youngest son and child of Bardock and Gine the husband of Chi-Chi and the father of 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 timesGoku is pure of heart possessing no negative feelings or thoughts He is highly loyal to his friends and family and is extremely protective of them as a result.