Constantine

Constantine turns up in the margins of Futurama's sprawling cast of one-off aliens and background weirdos, the kind of figure who gets a single scene, a memorable growl of a voice, and just enough personality to register before the plot moves on without him.

The character works because John DiMaggio brings the same gravelly commitment to a bit part that he gives Bender, finding a distinct rasp and attitude even in limited screen time. It's a small reminder of how much texture voice actors add to Futurama's crowded, ridiculous universe.