Double Diamond

Double Diamond is a male Earth pony who appears in the season five premiere of My Little Pony Friendship is Magic. He is one of the residents of the equality village founded by Starlight Glimmer.

Depiction in the series
Double Diamond first appears in The Cutie Map - Part 1 welcoming Twilight Sparkle and her friends when they arrive to the village. He and Party Favor introduce them to the village's founder Starlight Glimmer. He appears to be among Starlight's more faithful followers, as he shows disapproval toward Sugar Belle for talking so openly to the Mane Six. Later in the episode, he accompanies Starlight in leading the Mane Six to the cutie mark vault and takes part in the trap that Starlight springs on them.

In The Cutie Map - Part 2, Double Diamond personally brings the Mane Six's cutie marks to Starlight Glimmer's cottage, curious as to what she intends to do with them. Later, when Starlight is revealed to still have her cutie mark, the betrayed Double Diamond leads the other villagers in a revolt against her. He uses the "Staff of Sameness" to shatter the vault's glass covering and release the cutie marks unto their owners.

Double Diamond joins Party Favor, Sugar Belle, and Night Glider in pursuing Starlight when she escapes, during which he recovers his old skis and causes an avalanche on top of Starlight. After Starlight escapes, Double Diamond expresses excitement in getting to know his fellow villagers all over again.

Merchandise
Enterplay collectible card game Absolute Discord expansion set card #Pƒ13, For Equestria!, shows Double Diamond as in The Cutie Map - Part 1.

Quotes
"Trouble? Why, I don't think we've ever had trouble in our little village."

- The Cutie Map - Part 1

"Starlight, we have some new visitors."

- The Cutie Map - Part 1

"Fluttershy is one of us now. Surely she can be trusted."

- The Cutie Map - Part 2

"You said cutie marks were evil! You said special talents led to pain and heartache!"

- The Cutie Map - Part 2

"These are my old skis! This is where I first met Starlight!"

- The Cutie Map - Part 2

"How do you know that?! You never even gave us a chance!"

- The Cutie Map - Part 2

"This is a chance for all of us to get to know each other again for the very first time!"

- The Cutie Map - Part 2