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.

In When the Cold Breeze Blows Away, not only lived with her family, she also volunteered to join Equestria in during the World War III with her younger sister. She is one of the volunteered Rock Troopers in Great P365 War.