Princess Twilight
Twilight Sparkle is the main character in My Little Pony: Friendship is Magic. She is a female unicorn pony who later becomes a Princess and an Alicorn. At first, she lived in Canterlot as a student at Princess Celestia's School for Gifted Unicorns. Later she moved to Golden Oak Library in Ponyville also in the beginning of Season 1. Upon moving to Ponyville, Twilight is not only a student at Princess Celestia's School for Gifted Unicorns, she was Princess Celestia's personal student; sending friendship reports to Princess Celestia. As well, as being the Golden Oak Librarian. Then at the end of Season 4, Twilight residences in the Friendship Rainbow Kingdom Castle right there in Ponyville as the ruler of the Friendship Rainbow Ruler.
Family
Twilight is the younger sister of Shining Armor. She is the daughter of Twilight Velvet and Night Light. And the sister-in-law of Princess Mi Amore Cadenza or Cadence. Her 2 aunt-in-laws are Princess Celestia and Princess Luna. Twilight also received a baby dragon named, Spike and her favorite stuffed animal is named Smarty Pants.
Cutie Mark
Twilight's cutie mark bears a twinkling star with others surrounding it. I think her cutie mark represents magic and friendship. The star is the magic/her and the others surrounding it are her friends helping her achieve friendship. When Twilight receives the Elements of Harmony, her element crown has the star in it. Therefore, Twilight represents the Element of Magic! She received her cutie mark while trying out for Princess Celestia's School for Gifted Unicorns. As a young filly, Twilight studied magic day and night, wanting to attend Princess Celestia's School for Gifted Unicorns. During the entrance exam, she was asked to use her magic abilities to hatch a baby dragon's egg ,soon to be named Spike. But her magic got out of control when she was startled and shocked by Rainbow Dash's Sonic Rainboom. Princess Celestia saw Twilight's magical abilities and took note, making her a student at the academy. Upon getting to the academy, Twilight finally earned her twinkling stars cutie mark.