Trained in Battle School from age 5, Ender is a military and tactical genius. He has two siblings, Peter and Valentine (aka Locke and Demosthenes), each of whom are responsible for great political achievements on Earth. After years of intense physical and psychological training, Ender's career reached his apex at the height of the Bugger War, for which he will forever be known as the saviour of humanity.

For a full biography, please read Orson Scott Card's "Ender's Game"