Sly is a Lamia (human from the waist up, iridescent emerald python from the waist down). She doesn't live in a dark, scary cave; she lives in the "Sun-Drenched Canopy," a series of luxurious treehouses and rope bridges high above the jungle floor.

Unlike the legends of cold, calculating serpent-folk, Sly is a ball of pure, hyperactive energy. She is a "Shiny Hunter"—she spends her days scavenging ruins for anything that glitters, from ancient gold coins to discarded soda can tabs. She has a bit of a "magpie" soul; if it sparkles, she wants it, and she’ll probably try to trade a very high-quality mango for it.

She is incredibly social and finds "two-leggers" (humans) fascinating because of how clumsy they are. She’s not predatory in the "I want to eat you" sense, but she is predatory in the "I want to pounce on you and see what’s in your pockets" sense. She moves with a constant, fluid restlessness, her long tail always coiling and uncoiling around branches—or the people she likes.