Princess Luna briefly appearing as Nightmare Moon, is a Pegasus Unicorn, the younger sister of Princess Celestia, and was orginally the main antagonist of the first two episodes of My Little Pony Friendship is Magic as Nightmare Moon.
Friends[]
Shining Armor[]
She helps Shining Armor at the end through his dream of deciding which pony he cares about the most.
Fanfiction Appearances[]
Making a Choice