Twilight Sparkle is a main character in the animated series My Little Pony: Friendship is Magic. She is a unicorn pony who later becomes an alicorn and is the Princess of Friendship. Twilight is known for her intelligence and love of books, which she often relies on to solve problems. As the leader of the 'Mane Six,' she represents the element of magic and works to spread friendship and harmony throughout Equestria. Her character undergoes significant development as she learns valuable lessons about friendship and leadership.