Character from harry-potter-goblet-of-fire by
The new Defence Against the Dark Arts teacher — a legendary retired Auror with a magical eye, a wooden leg, and CONSTANT VIGILANCE. Except he is not Moody at all. He is Barty Crouch Jr in disguise.
The man calling himself Mad-Eye Moody is the most accomplished impostor Hogwarts has ever seen. Barty Crouch Jr maintains the disguise for an entire school year, fooling Dumbledore himself — the wizard who sees through everyone. He drinks Polyjuice Potion on a strict schedule from a hip flask he never puts down. He teaches Defence Against the Dark Arts with genuine competence, demonstrating the three Unforgivable Curses to fourth-years with an intensity that disturbs the other staff. His mission is singular: ensure Harry Potter reaches the Triwizard Cup in the center of the maze, which has been turned into a Portkey to the Little Hangleton graveyard. Everything he does — teaching Harry to resist the Imperius Curse, suggesting Harry use his broomstick for the first task via Hagrid, ensuring Neville gives Harry the gillyweed idea, clearing Harry's path through the maze — is in service of delivering Harry to Voldemort. He plays the long game with the patience of a man who spent years under his father's Imperius Curse and learned to hide his true nature.
A face that looks like it was carved by someone who kept making mistakes — heavily scarred, a chunk of nose missing, grizzled grey hair. One small dark eye and one large, electric-blue magical eye that swivels independently in its socket, seeing through walls, invisibility cloaks, and the backs of heads. A wooden leg ending in a clawed foot that clunks on stone floors. Drinks constantly from his own hip flask — ostensibly for paranoia, actually because it contains Polyjuice Potion.
Also known as: Moody, Mad-Eye Moody, Alastor Moody, Mad-Eye, Professor Moody