Son Goku, born Kakarot (カカロット Kakarotto), is a Saiyan raised on Earth and the overall main protagonist of the Dragon Ball series. Kakarot originally was sent to destroy Earth as an infant, there he would be adopted by Grandpa Gohan who named him Son Goku. A head injury at an early age alters Goku’s memory, ridding him of his initial destructive nature and allowing him to grow up to become one of Earth’s greatest defenders. He constantly strives and trains to be the greatest warrior possible, which has kept the Earth and the universe safe from destruction many times.
The original incarnation of Goku in the Dragon Ball prototype Dragon Boy was Tangtong. The original inspirations for that story were Hong Kong martial arts films, including Bruce Lee films such as Enter the Dragon (1973) and Jackie Chan films such as Drunken Master (1978); Toriyama later said he had a young Jackie Chan in mind for a live-action Goku, stating that “nobody could play Goku but him.