: Often pejoratively called "Pix," they are slight-bodied with hollow bones and four wings. In the Burgue, they are prohibited from flying.

: Individuals afflicted with the "Wolf's Curse" (werewolves). Key Characters & Factions Into Carnival Row: Exploring Carnival Row | Episode 1

: The only non-human race indigenous to the human continent of Mesogea.

: A London-like imperial city-state in the Republic of the Burgue where the series takes place. It is a refuge for non-humans ("Critch") fleeing the Great War, though they are often treated as second-class citizens.