Maud Pie

Doctor Maud Pie, full name Maudileena Daisy Pie, is a female Earth pony and Pinkie Pie's older sister. She is first seen as a filly in a portrait in Pinkie Pride, before first appearing in person as a grown mare in the season four episode of the same name, and her human counterpart appears in the My Little Pony Equestria Girls franchise; both counterparts also appear in IDW comics. She is called Maud Rock Pie in some merchandise.