Professor LeFoof

Professor LeFoof was Anastasia and Drizella's music teacher until it was decided that it would simply be Lady Tremaine who led her daughters' singing lesson.

Role in the film
While attempting to teach Anastasia and Drizella how to sing, LeFoof would've become infuriated because the barnyard animals would've begun to raise a racket and make horrible noises which he'd have thought the girls were making to make fun of him. By the time  Cinderella came in with the ball invitation, LeFoof would've stormed out in a rage.