Twilight Sparkle is a lavender unicorn pony with purple eyes and a dark indigo mane and tail in a hime cut with pink and purple streak running through them, and is the main protagonist of the series. Her cutie mark is a dark pink six pointed star with five smaller white stars surrounding it. Extremely gifted with magic, she is Princess Celestia's protégée, and she once considered study more important than friendship. When in danger from Nightmare Moon's prophecy, Princess Celestia sent her to Ponyville to learn the importance of friendship, which unlocked the fabled Elements of Harmony within her new friends, leading to the defeat, and redemption of Nightmare Moon. She decides to stay in Ponyville and study friendship with her mentor's blessings, accompanied by her assistant, a baby dragon named Spike.
Twilight studies extensively and takes an organized, analytical approach to solving problems. She sometimes has insecurities about fitting in, and can often let her fears, insecurities, her desire to impress Princess Celestia, and her logical way of thinking distract her, which sometimes leads to near madness or, in one case, chaos. Unlike other unicorn ponies, Twilight can perform a wide variety of magic, including teleportation, force fields, and telekinesis. She represents the Element of Magic, which takes the form of a tiara. She has an older brother named Shining Armor, the captain of the Canterlot Royal Guard, who marries her former foalsitter Princess Cadance. In "Owl's Well That Ends Well", she gained a pet horned owl named Owlowiscious.