Will Burrows: Will is an underground lover with a fast, upbeat personality.
Chester Rawls: Chester is Will's best friend. Chester has a rough-n-tough personality.
Dr Burrows: Dr Burrows is Will's father who also has a love of digging holes.
Cal: Cal is Will's secret younger brother from the Colony
The Styx: The Styx are an evil religious force who live underground. The Styx uniform consists of a black shirt, black pants, Boots, A scythe, and a rifle.
Rebecca: Rebecca is the leader of the Styx. Rebecca posed as Will's sister in Highfield to learn more about him
Uncle Tam: Uncle Tam is Will's secret uncle. He lives underground with Cal.