|!||This article contains spoilers. Read at your own risk.||!|
|“||You're my only friends here at this school!||”|
– Marcy to Nikki, Chloe, and Zoey in Dork Diaries: Tales from a Not-So-Smart Miss Know-It-All
In Dork Diaries book 5, Marcy signs up to be part of the Westchester Country Day News staff. She partners up with MacKenzie to work on the fashion column. MacKenzie is very rude to Marcy and makes fun of the way she dresses. Marcy writes a letter to Miss Know-It-All saying that she has no new friends at school and that she misses Idaho. At the end of the book, Marcy sees Brianna's newspaper and discovers that MacKenzie threw Nikki, Chloe and Zoey in a storage closet to prevent them from competing in the Holiday On Ice show. Marcy uses this information to get rid of MacKenzie.
In Dork Diaries: Tales from a Not-So-Dorky Drama Queen, Marcy is mention when MacKenzie receives a letter about a girl insecure about getting braces. MacKenzie believes that the letter was from Marcy, which was later proven untrue when Nikki tries to apologize to Marcy.
In Dork Diaries: Tales from a Not-So-Perfect Pet Sitter, it was relieved that she is now an office assistant. Marcy agreed to hide the Holly and her puppies in Principal Winston's office for the day. But at the end of the day, she opened the cage and let the dogs out, and they trashed his office. However, Max Crumbly took the blame and saved them from being apprehended. Marcy adopted one of the puppies.
PersonalityMarcy seems very sensitive because she began to cry when Mr. Zimmerman began to yell at the newspaper staff. She likes fashion, sewing, and writing. While Marcy didn't stand up to MacKenzie, she finds out about Nikki's dilemma and she stood up for them. Marcy is considered a very reliable person.
Marcy has a slender body which usually goes into overalls or unfashionable clothes. She has short hair with a part in the middle. She has eyes that curve downward, which are very similar to the eyes of Brianna, Zoey, Mrs. Maxwell and Jessica. She wears oval-shaped glasses and has braces. In book 9, she said that she'd be getting her braces removed soon.
All is that is known about Marcy's family is that she has six year-old brother who is in the same class as Nikki's younger sister, Brianna.
Marcy's friends include Nikki Maxwell, Chloe Garcia, and Zoey Franklin. Nikki helped Marcy get an invite to Brandon Roberts's party. When Nikki, Zoey, and Chloe were about to face consequences because of MacKenzie's manipulation, Marcy saved them by recording MacKenzie's almost response when she asks that she locked the three in the storage room in book 4.
Marcy wanted to be friends with MacKenzie Hollister until she realized how rude and vain she was.
Love InterestIt is stated that Marcy has a crush on Tyler, someone that she met on holiday, in Nikki's blog. He seemed to like Marcy back and gave her a gift. She might also have a crush on Max Crumbly because she was acting flirtacious.