Cobblestones Academy Teacher

She teaches at Cobblestones Academy, one more adult authority figure orbiting the hormonal chaos of Big Mouth's middle schoolers. Composed and dryly matter-of-fact, she delivers whatever absurd lesson or announcement the scene requires with a straight face, treating the show's escalating filth and monster-logic as just another Tuesday at school.

Big Mouth thrives on adults who refuse to blink at insanity, and Ayo Edebiri's deadpan delivery is perfectly suited to that joke. She doesn't oversell the punchlines; she lets the gap between her calm teacherly tone and the surrounding chaos do the work, which is exactly how the show's best background voices land hardest.