Ah, sohow she went bad.In a series of FIM-Equestria Girls crossovers I am now drawing, Derpy's human counterpart (whom I call Ditzi Hoover) wears the mascot costume and by extension is part of the cheerleading squad because nopony or nobody else wants to wear such a goofy costume. But Ditzi cheerfully plays the Dragon because it reminds her of her science teacher's real dragon buddy. (Twilight is a young science teacher at CHS as part of her royal duties.)