UPON HIS ARRIVAL ON EARTH, THE INFANT IS DISCOVERED BY SON GOHAN, WHO BECOMES THE ADOPTIVE GRANDFATHER OF THE BOY AND GIVES HIM THE NAME GOKU. THE BOY IS INITIALLY FULL OF VIOLENCE AND AGGRESSION DUE TO HIS SAIYAN NATURE, UNTIL AN ACCIDENTAL HEAD INJURY TURNS HIM INTO A CHEERFUL, CAREFREE PERSON.