Maud Pie
Maud 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, she appears in person as a grown mare in the season four episode of the same name, and her human counterpart makes cameo appearances in My Little Pony Equestria Girls: Rainbow Rocks; both counterparts also appear in IDW comics. She is called Maud Rock Pie in some merchandise.