See: Beth (Persona Assistant) for the alto-singing swing choir member.
Beth is a student at Pearl Bailey High School.
In "Escape from Pearl Bailey", Beth is seen at the school election.
Beth appears in "Daddy Queerest" in the school gym, where she is shocked by the fact that anyone can get drunk and make out with a girl like Jewel. After this horrifying story of how Steve Smith did just that, she is seen running out of the gym, throwing a beer bottle into a recycling bin.
In "Brains, Brains and Automobiles", when Steve, Snot, Toshi, and Barry wear thongs to their camp, the boys in the camp get angry and hurl them over to the girl's side of the camp. Beth is in the girl camp.
Beth also appears in "License to Till", where she is shown walking down the school hallway, when she suddenly sees Steve's fake wiener and is surprised by it.
She and Melissa are friends with Roger's persona of Bing Cooper, a sexually-active high school student in "I Am the Walrus". Beth confronts him when she finds an acceptance letter to UCLA, believing they were going to Arizona State University together. Roger admits that he only wished that she found out when he didn't show up at Arizona State. Beth is voiced by Janna Levinstein.
- "Stan Knows Best"
- "Helping Handis"
- "With Friends Like Steve's"
- "Lincoln Lover"
- "Dungeons and Wagons"
- "Four Little Words"
- "Escape from Pearl Bailey"
- "Every Which Way But Lose"
- "Daddy Queerest"
- "My Morning Straitjacket"
- "May the Best Stan Win"
- "Bully for Steve"
- "Brains, Brains and Automobiles"
- "Best Little Horror House in Langley Falls"
- "License to Till"
- "Stanny-Boy and Frantastic"
- "I Am the Walrus"
- "The Unbrave One"
- "The Wrestler"
- "Adventures in Hayleysitting"
- "Naked to the Limit, One More Time"
- "Steve and Snot's Test-Tubular Adventure"
- "News Glance With Genevieve Vavance"
- "The Life Aquatic With Steve Smith"
- "Garfield and Friends"
- "Standard Deviation"
- "The Witches of Langley"
- "The Talented Mr. Dingleberry"
- "Mean Francine"
- "Stan & Francine & Connie & Ted"
- "Tapped Out"
- "The Chilly Thrillies"
- "Russian Doll"