Barty Crouch Jr. clearly did not know Dismask's identity or name, only that he was not a wizard from the United Kingdom.
But after hearing Barty Crouch Jr.'s description, Harry immediately knew he meant Dismask, especially since he had seen Dismask at the graveyard earlier that day.
At Dismask's reminder, Barty Crouch Jr. and Peter had abandoned the idea of impersonating Moody.
After all, Hogwarts already had a Professor of Defense Against the Dark Arts. Lupin had spent years operating in gray areas and was extremely vigilant. Sharing an office with him every day would make it far too easy to be discovered.
Soon, however, they had found a new target: the Ministry of Magic official Umbridge.
Compared with Moody, Umbridge had been much easier to deal with. Barty Crouch Jr. and Peter had subdued her easily, then impersonated her and volunteered to get involved in preparing and organizing the Triwizard Tournament.
Minister for Magic Fudge had been happy to see this happen.
After all, if Crouch successfully organized the Magic Cup Triwizard Tournament after successfully organizing the Quidditch World Cup, there would be no room left to maneuver over the position of Senior Deputy Minister.
And that was clearly something Fudge did not want to see. He had never liked the elder Crouch.
Using his knowledge of his father, Barty Crouch Jr. had easily obtained a wealth of information from him, including all sorts of details and loopholes in the tournament rules.
"How do you think you managed to complete those tasks so smoothly? Surely you didn't really think you were better than the elite seventh-year students from the other six schools?" At this point, Barty Crouch Jr. looked at Harry with smug contempt.
"During the First Task, I deliberately brought up Quidditch players taming dragons in a pub