Trina Riffin is the main antagonist in the Canadian TV series Grojband. She is Corey Riffin's cruel, snobbish, evil 16 year old sister who wants nothing to do with Grojband whatsoever. She has an obssesive crush on a guy named Nick Mallory, and whenever she does not get her way, she gets furious, her eyes turn red, and she magically brings out her diary and pen to write her secrets in anger.