Sunset Shimmer

Sunset Shimmer is a female unicorn pony-turned-human student of Canterlot High School and a main character in the Equestria Girls franchise. She is the reformed main antagonist of My Little Pony Equestria Girls and the leader of the Equestria Girls. Throughout the first film, Sunset Shimmer is shown to be self-absorbed, condescending, manipulative, and dishonest. She frequently insults and belittles others and thinks little of it. According to human Fluttershy, Sunset makes life miserable for "anyone who stands in her way". As a result, most of the Canterlot High School student body is afraid of her. She is also not above making threats and blackmail in order to realize her goals. When Sunset puts on the element of magic, she transforms into a demonic visage of herself. While in this form, she becomes more ruthless, going so far as attempting to dispose of Twilight. After she is defeated, Sunset Shimmer becomes immediately repentant and apologizes for everything she's done, appearing to renounce her prior dishonest and unkind ways. In the second film, Sunset Shimmer has completely discarded her old self and starts believing in friendship, being kind toward others and befriending former enemies. She is also deeply repentant for what she did in the first film's climax, referring to her transformed self as a "raging she-demon". However, she suffers from a lack of confidence, keeping silent in situations she feels it isn't her place to speak up and falling prey to the Dazzlings' taunting. During the final battle, she finally overcomes her insecurities and joins the Rainbooms in defeating the Dazzlings, gaining a half-pony form in the process. By the end of Rainbow Rocks, Sunset starts writing friendship reports to Princess Twilight using the book she once used to communicate with Princess Celestia.