Twilight Sparkle

Twilight Sparkle - is one of the rulers of Equestria and the Princess of Friendship.

Backstory
Twilight Sparkle began her journey as Celestia's student in Canterlot. Later she was send to Ponyville with her irreplaceable partner Spike to continue her studies, especially the magic of friendship. During that time she met a lot of people and some of them later become her very best friends. With their help she managed to defeat Nightmare Moon and unveil their positions as elements of harmony and Twilight as it's hidden element of Magic.

Also during her days in Ponyville she became an archmage, obtained a castle and helped to defeat a number of villians such as Chrysalis, Discord, Tirek and Sombra.

Part 1 - Forgotten
Before Twilight became sole ruler of Equestria she met a man named Daylight, who had a memory loss due to sorcery spell. She consulted with Zecora about his problem and tried to clear his mind clouded by sorcery by giving him history and culture lesson about Equestria.

...

Personality
Twilight Sparkle is a person of knowledge and logic. She is obsessed with reading books. At first she was asocial but later became more open and made a bunch of good friends, without whom she cannot imagine her life.

Appearance
Twilight is a tall young lady with purple eyes and light purple wings. She has long hair on back and bang in front. It's color is dark blue with number of darker lines and very noticeable two wide extra lines, bright pink and purple, that goes along all hair's length. Her cutie mark is six-pointed pink star with white similar smaller stars, one behind purple star and five more around it. She wears light purple shirt and socks, dark grayish purple sweater vest and shoes and purple skirt. On left side of the vest is embroidered her cutie mark. ...
 * -|School Casual=
 * -|Princess Casual=