Born on the planet Vegeta and sent to Earth as an infant Goku was raised by his foster Grandfather Gohan, and despite his mission to destroy Earth he has spent most of his life defending it.
Son of Goku the young Gohan is half Sayian and have Human and quite possible the strongest being on the planet. Although unaware of his true power for many years he is first trained to focus his energy by Piccolo in order to defeat the Sayian warriors on there way to Earth.
