Cozy Glow is a female school-age Pegasus pony who first appears as a supporting character in the season eight episode Marks for Effort, later becoming the main antagonist of the finale School Raze and one of the main antagonists of the season nine finale The Ending of the End. She has a salmon-pink coat, curly light blue mane and tail, scarlet eyes, and a cutie mark of a rook. Cozy is a former student of Twilight Sparkle's School of Friendship, imprisoned in Tartarus for attempting to destroy all magic. She is released from her imprisonment by Grogar to join his alliance, along with Queen Chrysalis and Lord Tirek, to defeat Twilight and her friends and conquer Equestria. She is defeated by the Mane Six and their allies, and turned to stone along with Chrysalis and Tirek. Cozy's innocence was revealed to be a facade to hide her true nature: a selfish, manipulative, tyrannical, and narcissistic child who would do anything to get what she wants by any means necessary. Unlike the other villains in the series, who all believed friendship to be weak or meaningless, Cozy Glow knows full-well about the power of friendship from learning in Twilight's School of Friendship. Unfortunately, she was far too obsessed with the "power" aspect to understand (or even care about) how real friendship worked. Because of this, she viewed friendship as simply a tool to exploit for her own gain and believed that the more "friends" she possessed, the more "powerful" she was. Being a small Pegasus filly, Cozy Glow has no physical attributes other than being able to fly, so she must rely on her wits to accomplish her goals. She has used her charm and cuteness to manipulate the Mane Six, Starlight Glimmer and the CMC and have them unwittingly play into her hooves. She is a skilled liar and faker, having successfully convinced the CMC that she needed help with her exam, when in fact she had failed it on purpose, and faking remorse when she confesses to having done so. With these skills, Cozy effectively turned the entire student body of Twilight's school into her personal army. She is also perceptive enough to know when somepony-else is trying to deceive her, as she tricked the CMC and locked them in a closet when they attempted to distract her. Cozy Glow also has limited knowledge of magical artifacts thanks to her pen-pal Tirek, having used six of them in conjunction with one another to take all of Equestria's magic and send it another realm.