Princess Luna is Princess Celestia's younger sister and co-ruler of Equestria. She was previously the antagonist Nightmare Moon.
Princess Luna maintained the moon's cycle when it was supposed to be nighttime after her sister, Princess Celestia handled the daytime hours. The fact that most ponies sleep during the night had Luna in a state of envy and one day, she refused to let the sun rise, snapped out of jealousy and turned into her evil persona, Nightmare Moon. She vowed to bring eternal night into all of Equestria, but lost in her first battle for her goal and was imprisoned inside of the moon for 1,000 years by Celestia and the Elements of Harmony. After her sentence, she reappeared during a festival to set her diabolical goal once again, but was defeated and turned back into her normal state after all her armor was removed. Currently, she has returned to her nightly duties after ending the feud between herself and Celestia.
Luna was created by Lauren Faust she appeared in the very first two episodes of My Little Pony: Friendship is Magic as the first antagonist to the main characters. Her standard voice actress is Tabitha St. Germain while in the Japanese Dub she is first voiced by Takako Honda as Nightmare Moon and Yumi Uchiyama as her original self.
My Little Pony Equestria Girls
Animated film of the My Little Pony: Friendship is Magic series, where Twilight Sparkle must regain her stolen crown by entering a mirror to an ...