Gretchen is one of the Plastics she is the gossip girl in the group and the sidekick of Regina George. Despite her being pretty, Regina reffered to her as a 'not pretty' person, behind her back. She comes from an extremely rich family, as her father is the inventor of Toaster Strudel. Through the entire movie, Gretchen is shown to be one of the nicer members of the Plastics, only being mean-spirited under the influence of Regina. Gretchen is also the only person that knows almost all of Regina's family secrets such as the fact that her parents are having trouble in their marriage and the fact that Regina received a nose job at some point. Gretchen constantly tries to make a slang term, fetch, happen.
After the break-up of the Plastics toward the end of her Junior year, Gretchen eventually joined the Cool Asians clique of North Shore High School. Her deadly sin is avarice.
Gretchen has shoulder length brunette hair, and she is the only brunette in the Plastics. She has brown eyes and wears makeup throughout the film, significantly more than her fellow Plastics. She mentions that she enjoyed wearing hoop earrings as a personal accessory for quite some time, but was forced to give them up by Regina, after the latter claimed that is was 'her thing'.
After joining the Cool Asians clique, Gretchen's hair is straightened down. Finally, she's also wearing her beloved hoop earrings.
She has a strong crush on a boy named Jason, but he seems to be interested in other girls, as he brought a possible girlfriend to Cady's get-together and was seen making out with her.
She appears very close to Karen Smith and frequently watches out for her. For example, when Karen admits to her that she has kissed her first cousin Seth, she tries to help Karen understand that it's wrong to be romantically involved with someone with whom you share relations. When Regina calls her a slut, Gretchen seems to feel bad for her and takes it upon herself to tell Karen. When Gretchen, Cady, and Karen are sent to the principal's office for the Burn Book, Gretchen does not tell on Karen or Cady. She seems to accept Karen's apology, and in return, Karen is the only girl to catch Gretchen when she does her trust fall off the table.
Her relationship with Regina is a complicated one. While it is clear that Regina has confided a large amount of personal secrets in Gretchen, Gretchen often ends up spilling them without meaning to. After a slip up, she always says "Don't tell Regina I told you that." Regina is overly controlling and Gretchen is clingy, willing to do anything to keep Regina's trust and friendship. For example, she promised Cady she would keep her attraction to Regina's former boyfriend a secret, but gives the information over to her without a second thought. She gave up wearing hoop earrings when Regina told her she must, going so far as to turn down a pair of expensive white gold ones her parents gave her for Hanukkah. She knows that Regina cheats on Aaron Samuels with Shane Oman, and seems to feel remorseful about it, but never tells anyone until she confesses to Cady. She is distressed, when Cady receives a candy cane from Regina and she does not. At the Winter Talent Show for the plastics performance of Jingle Bell Rock performance, she overreacts when Regina tells her to switch places with Cady, claiming she is "always" on Regina's left. When performing, there is visible space between her and the other Plastics, as though Regina's "rejection" had her unsure of her place in the group. When Regina cried over losing Aaron and claimed no one understood her, Gretchen ran after her saying "I understand you, please talk to me!" As Cady says "The meaner Regina was, the harder Gretchen tried to win her back."
Irregardless! Ex-boyfriends are just off limits to friends. I mean, that's just like, the rules of feminism!
I'm sorry that people are so jealous of me. But I can't help it that I'm popular.
That's so fetch. / It is so fetch. / That is so fetch.
[to Cady] If only you knew how mean she really is... You'd know that I'm not allowed to wear hoop earrings, right? Yeah! Two years ago she told me hoops earrings were *her* thing and I wasn't allowed to wear them anymore. And then for Hannakuh my parents got this pair of really expensive white gold hoops and I had to pretend like I didn't even like them and... it was so sad. And you know she cheats on Aaron? Yes, every Thursday he thinks she's doing SAT prep but really she's hooking up with Shane Oman in the projection room above the auditorium! I never told anybody that because I am *such* a good friend! [begins to cry]