Princess Celestia

"I knew it was you who had the magic inside to defeat her, but you could not unleash it until you let true friendship into your heart."

- Princess Celestia Princess Celestia is a recurring character in My Little Pony Friendship is Magic and the co-ruler of Equestria along with her sister Princess Luna, both of whom are responsible for raising the sun and the moon. She is the mentor of Twilight Sparkle, whom she addresses as her faithful student.

Over a millenium ago, Celestia and Luna discovered the Tree of Harmony and took the Elements from it to defeat Discord. Afterwards, Celestia had to use the Elements herself to fight Luna, who had become Nightmare Moon.

At the beginning of the show, Celestia was no longer linked to the Elements of Harmony so she sent Twilight to Ponyville so that she find five ponies who could help stop Nightmare Moon. Once Twilight Sparkle and her new friends restored Luna to her true self, the two sisters were united once again.