Waitress

She turns up wherever the Planet Express crew stops to eat, order pad in hand, unbothered by tentacles, time paradoxes, or customers who are heads in jars. Brisk and unglamorous, she treats the absurd future like any other shift: take the order, roll her eyes if needed, move on to the next table.

Futurama's background is stuffed with throwaway voices, and Tress MacNeille gives this one just enough flat, put-upon exasperation to land a laugh without asking for attention. She's a small joke about how ordinary service work stays exactly the same no matter how strange the century gets.