Marcie O'Malley is Nancy's sister. She only appeared in Patty Caper in the show's run, along with Officer Rob, She is green, with red hair. She was mentioned in Whale of a Birthday. She arrested Mr. Krabs for stealing the krabby patty secret sauce and accusing SpongeBob. She is last seen pinching Krabs' eyes with Officer John while the 2 officers watch SpongeBob giving people free krabby patties and the 2 officers laugh at Mr. Krabs.