The Head of the Department of International Magical Cooperation. Mr. Crouch is an uptight and exacting individual who's very caught up in his own importance.

Mr. Crouch sent his son to Azkaban and both his son and his wife died within the year. Harry notices that Mr. Crouch looks progressively sicker throughout the year and around Christmas, Mr. Crouch stops coming to work. A month before the third task, Mr. Crouch shows up on the Hogwarts grounds, seemingly mad but asking to speak to Dumbledore. He disappears before he has the opportunity. Later, Harry and Dumbledore discover that Barty Crouch and Mr. Crouch's wife swapped places using Polyjuice Potion and Mr. Crouch kept Barty at home under an Invisibility Cloak and the Imperius Curse. Though in all other cases Mr. Crouch seems to be a competent wizard, they learn that when Bertha Jorkins confronted him about this, Mr. Crouch didn't perform the Memory Charm properly and permanently damaged her memory. When Voldemort arrives on the Crouch doorstep, he places Mr. Crouch under the Imperius Curse--hence his absence from work--but eventually, Mr. Crouch begins fighting it. This is why Harry finds him on the Hogwarts grounds. Barty Crouch kills his father and, after transfiguring his body into a bone, buries him.