Limestone Pie and Marble Pie
Limestone Pie and Marble Pie are Earth ponies and members of the Pie family. They are Pinkie Pie's oldest and youngest sisters respectively. They first appear as fillies in a flashback in The Cutie Mark Chronicles before debuting as fully grown mares in present day in the chapter book Pinkie Pie and the Rockin' Ponypalooza Party! and the season …