Her full name was revealed in the 2015 film The Peanuts Movie as Frieda Rich, where she places 12th in the test results.

She was the only girl on Charlie Brown's baseball team to not wear a cap because it would cover up her "naturally" curly hair.

[4] She sat behind him in class, and although he considered her a friend, he also confessed that because she was such a chatterbox, he hadn't heard a word their teacher said the whole semester.

Unlike Lucy, Patty, and Violet, she seemed to be mindful of his feelings and never teased him or put him down to his face (except for rare moments in the Peanuts specials), though she did get mad at him a few times.

[11] She seemed to be one of the few characters that Charlie Brown felt confident enough to stand up to, as he did once when she was badgering Snoopy about chasing rabbits and he told her to mind her own business.

Linus tried to protect her the first time she unintentionally upset Lucy (see below), and she in turn was one of the few kids who didn't see his need for a security blanket as a bad thing, for which he was so grateful that he kissed her hand.

[14] Despite Frieda's faux pas the two girls eventually became friends, and when they played baseball for Charlie Brown's team they often spent their time in the outfield chatting instead of paying attention to the game.

In one strip and episode of The Charlie Brown and Snoopy Show, Frieda commented to Lucy that Schroeder wasn't very friendly.

[16] Once, in a fit of frustration, she reported Snoopy's behavior to the "Head Beagle," which led to him being found guilty of not meeting his rabbit quota and left the neighborhood kids mad at her for turning him in.

[17] Her choice of cat ended up being more comical than intimidating; Faron is seemingly boneless, and she carries him everywhere, draped over her arms.

[18] A running gag included Charlie Brown, Linus, and even Snoopy getting trapped into holding Faron while Frieda ran her errands.

According to Charles Schulz, "I realized that Frieda added relatively little to the strip and had few character traits beyond bragging about her hair and her obsession with getting Snoopy to chase rabbits."

After her last major storyline in October 1969 (after reporting Snoopy to the Head Beagle), she only featured in 10 further strips between 1970 and 1985, often with over a year between appearances.

Frieda also continued to make appearances in the animated Peanuts specials and the Saturday morning series The Charlie Brown and Snoopy Show, even being mentioned in the lyrics of the latter's theme song.