Busboy

Busboy works the counter at the diner where Big Mouth's kids hash out their latest crisis, refilling water glasses and drifting into conversations he was never invited to. He's unbothered, weirdly wise, and treats every teenage meltdown with the same easy calm, like he's seen it all before and it never rattled him.

He's a small, odd grace note in a show built on shrieking hormone monsters and shame demons — a background character who occasionally cuts through the chaos with plainspoken sense. Nick Kroll gives him a loose, unhurried voice that stands out precisely because it asks for nothing, expects nothing, and somehow lands harder for it.