Wilkie is the Apparition Instructor at Hogwarts during Harry's sixth year. He tells the students he will be teaching them over twelve weeks, in preparation for their Apparition test. When Susan Bones splinches herself on the students' fourth attempt at Apparating, Wilkie demonstrates how it should be done, turning gracefully on the spot with his arms outstretched and disappearing in a swirl of robes, reappearing at the back of the Hall. He encourages the students to try again, continuing the lesson for another hour. Twycross does not appear discouraged when none of the students manage to Apparate successfully, merely reminding them of the next lesson and Vanishing the hoops, walking out of the Great Hall.