Thomas is the last boy, but not the last person to enter the Glade. The only thing remembered when he came into the glade was his name. Chuck described him as about 16 years old, of average height, and brown haired. He was called Greenie as he is a new arrival. He becomes a Runner with Minho after being the first person to spend a whole night in the Maze and saves Alby when he was about to die