Abuela

Abuela turns up as one of the countless minor faces populating the Birch and Glouberman world, a grandmother figure rendered with the show's usual cartoonish warmth and bluntness. She speaks her mind without much filter, treating the kids' anxieties and hormonal chaos as just another Tuesday, unbothered by the show's constant crudeness around her.

The joke is baked into the casting: Nick Kroll, already voicing half the cast, slips into an elderly grandmother's register without missing a beat, and the incongruity between his voice and her persona is the whole gag. It's a small, efficient bit of vocal comedy that never asks to be more than that.