Goku is the protagonist in Dragonball Extreme. Goku / Son Goku is the protagonist of the Dragon Ball metaseries. He is the husband of Chi-Chi, father of 3 sons, Gohan, Goten and Geki and a daughter Gina, the grandfather of Pan, and later the great-great grandfather of Goku Jr. Goku is a defender of Earth and informally leads the Z Fighters. Throughout his life, he trains hard and strives to be the greatest warrior possible, while at the same time using his amazing strength and skills to uphold peace. These qualities make him the perfect example of a hero, though not necessarily the perfect role model, due to his lack of education.