|Marcy is one of 782 characters who have appeared in fewer than six episodes. Not much information may be available about him or her.|
Marcy was first mentioned in #7: “Promises, Promises” as Connie's best friend in California. However, she didn't appear until #52: “Connie, Part 2”. She's apparently a party animal and spends time with Connie at the beach. It is revealed in #583: “The Champ of the Camp” that she was also camp friends with Hope and was nicknamed "Muskrat" in the operation against "Goggles".
Any family she may have is unknown.