Marci McFist is Hannibal McFist's loving wife and Bash Johnson's and Dollianne's mother. She knows and accepts her husband wanting to destroy the Ninja, but at the same time she strives to maintain a positive public image.
Marci is sweet and kind, deeply loving her husband and her son. However, she is overprotective of her son, always spoiling him and never noticing or believing that Bash is a troublemaker. She also knows that McFist is evil, but she isn't bothered by it and even loves it when he gets thrilled at finding a way to defeat the Ninja. She seems to always get what she wants, like the biggest tree for the McFist Industries Christmas party in "Silent Punch, Deadly Punch", McFist helping Bash with his science project in "Attack of the Killer Potatoes", and McFist and Viceroy giving Bash pranks to use on his fellow classmates in "Pranks for Nothing". While usually calm in comparison to her husband, Marci gets frustated at McFist for not calling out for someone to help Bash in "Rise of the Planet of the Robo-Apes", and she is so angry at McFist attempting to destroy her son that apparently, she is even angrier at him than the Sorcerer is at him for failing in "Bash Johnson: 11th Grade Ninja".
- Marci has a bit of a Canadian accent, although it's unknown if it means she's Canadian.
- Marci is the only mother of a character who has appeared in the show, unlike Bucky's mom, who has only been heard.
- She is also one of the few wives to appear in the show.
- She has gotten angry at McFist three times so far. The first time was in "Bash Johnson: 11th Grade Ninja" (although it is indicated by McFist and not actually shown),the second time was "Rise of the Planet of the Robo-Apes" when Hannibal refrains from asking anyone to save Bash and the third was wondering what her Christmas present is in Happy Hanukkah! Howard Weinerman .
- Marci is one of the few people in Norrisville who knows McFist is evil, including Viceroy, Randy, and Howard.
- Even though Bash has seen while not put together that McFist is out to get the Ninja, Marci tries to hide the truth by covering Bash's ears when the Ninja reveals McFist's true nature.