Sunset Shimmer is a female unicorn pony -turned- human and a main character in the Equestria Girls franchise, initially appearing as the main antagonist of My Little Pony Equestria Girls. She is a student at Canterlot High School , a former student of Princess Celestia , and a rhythm guitarist for the Rainbooms. Sunset Shimmer resembles the G3 Earth pony Sunshimmer in pony design and name. She has a light amber coat, red and brilliant yellow mane and tail, and a cutie mark of a red and yellow shimmering sun. The fact that her backstory seems like a show plot" and responded "Nope.