Melissa "Missy" Ann Harrington is Erica Harrington's older sister. She has blonde hair and electric blue braces. She is very mean and often calls Erica's friends "ingrates". She is in the 6th grade at the middle school. She and Erica have an older brother John in the 8th grade. Missy's best friend is named Stacy. Missy is a baton twirling majorette and won a trophy as big as Allie. She also does jazz and tap dancing.

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