When first introduced, Cozy portrays herself as sweet, cute, innocent, and naive. As a student of the School of Friendship, she often displays a fear of failing class and being expelled. However, this is later revealed to be a front for Cozy's true nature as a schemer and manipulator. She worms her way into the lives of the Mane Six, Young Six, and Cutie Mark Crusaders, playing the role of an adorable, friendly filly and earning their trust, as part of her plan to take over the school and eventually all of Equestria.