Peppermint Patty first met Marcie when she was her camp counselor and went on to become her closest friend. After Marcie became a major character, the two girls almost always appeared together. However, Marcie often irritates Peppermint Patty. At first, Peppermint Patty became annoyed whenever Marcie called her "Sir", and she would continually snap at Marcie, "Stop calling me Sir!" but, eventually, she got used to it, although she still prefers that Marcie not call her "Sir". She still calls Peppermint Patty "Sir" at times, and the reasons for this nickname are unknown.