Derpy

Derpy Hooves is the fan-given name of a gray Pegasus pony. The name was given by the show's internet following due to her having a cross-eyed "derpy" expression in the first episode. The name has since been adopted by the crew and Hasbro. Starting with Feeling Pinkie Keen, the show's crew began giving the pony crossed eyes intentionally, as a nod to the fans. Derpy Hooves is also named Ditzy Doo. One of her appearances were later modified so she is less wall-eyed.