He's a character in a short story which became a novel called Ender's Game by Orson Scott Card. In the book, children who show appropriate aptitudes are recruited to go to Battle School, where they play what amounts to a sophisticated game of Capture The Flag with aspects of Laser Tag. The game is actually practice for developing strategies to fight an alien race. Ender turns out to be the hope of mankind because he's able to be exactly as ruthless as necessary to win, while also understanding his enemy so well that he knows exactly how to defeat the enemy. When it's time to act... Ender acts, decisively and for the total destruction of his enemy.
