Andrew Wiggin, often referred to as "Ender," is the main character in the science fiction novel series by Orson Scott Card. He is a gifted child selected to attend a military training school in space, where he is trained to lead humanity in a war against an alien species known as the Formics. Ender is known for his strategic thinking and empathy, which allow him to excel in the competitive environment of the Battle School. Throughout the series, he grapples with the moral implications of his actions and the burden of leadership, making him a complex and relatable character.