Here are some facts about Limestone Pie, a pony who was first seen in a flashback in The Cutie Mark Chronicles as a filly before making her debut as a grown mare in Hearthbreakers:
* She is the first pony in the history of the show to have two different eye colors (her eyes colors are amber in Season 1 as a filly and her eye colors are green as a grown mare). She is also the only member of the Pie Family to have two different eye colors.
* She is the only sister of the Pie Family who has never been involved with romance, unlike Pinkie Pie, Maud Pie, and Marble Pie, who have been involved in romances with Cheese Sandwich, Mudbriar, and Big Mac.
* She and Marble Pie have the same number of episode appearances in the show, with a total of six