Maud Pie

Maud Pie is a female Earth pony and the phlegmatic older sister of Pinkie Pie. She is first seen as a filly in a portrait in Pinkie Pride and appears in person as a grown mare in the season four episode of the same name.

Development and design
With her single eyelash on each eye, Maud shares her eye design with many female Crystal Ponies.

Her name is a play on the phrase "mud pie", a popular dessert that originated in Mississippi.

Depiction in the series
Maud first appears as a filly in Pinkie Pride, in a photograph of the first party Pinkie Pie had ever thrown.

At the beginning of the episode Maud Pie, Pinkie Pie speaks at length about her close relationship with Maud and their tradition of trading rock candy necklaces. She describes Maud as sharing interests with her friends, such as Rarity's love of fashion, Applejack's honesty, and Twilight's fondness for books.

When Maud arrives in Ponyville and meets Pinkie's friends, the ponies are surprised by her eccentricities, overall lack of enthusiasm, and strange taste in games. Maud is shown to have a deep knowledge and fascination with rocks. She also has a pet rock named Boulder.

Each of Pinkie's friends attempt to befriend Maud, but her odd tastes and interests at times clash with theirs. She prefers plain, sometimes muddy fashion choices over Rarity's lavish dresses, is more interested in rocks than Fluttershy's many animal friends, writes her own rock-themed poetry, and is honest to the point of bluntness.

When the ponies tell Pinkie that they can't connect with Maud the way she has, Pinkie puts together a large obstacle course that incorporates all of their interests as a bonding activity. When Pinkie demonstrates how the course is run and inadvertently puts herself in harm's way, Maud springs into action and displays incredible speed and tremendous physical strength by smashing a giant boulder to bits. It's with this feat that the others realize the extremes Maud would go for her sister, and are able to befriend Maud over their shared love of Pinkie.

As Pinkie and her friends see Maud off and exchange rock candy necklaces, Maud smiles, saying that while she doesn't really like candy, she does love Pinkie Pie.

Other depictions
Maud is first mentioned in the chapter book Pinkie Pie and the Rockin' Ponypalooza Party!, referred to not by name but simply as "your older sister" by Pinkie's father Igneous Rock.

Quotes
"It's a rock. His name is Boulder."

- Maud Pie

"Boulder and I sometimes play a game called 'camouflage'. It's kind of like hide and seek but waaaaaaay more intense."

- Maud Pie

"Rock, you are a rock. Gray, you are gray, Like a rock, which you are. Rock."

- Maud Pie

"Rocks, these are my rocks. Sediments make me sedimental. Smooth and round, Asleep in the ground. Shades of brown And gray."

- Maud Pie

"I don't really like candy. But I do love Pinkie Pie."

- Maud Pie