Northworld was long considered a world adapted for human presence. The discovery of a Control Pyramid changed that. The Control Pyramid seem to include a monitoring system for five separate visitor species, classified according to a color scheme. The five Northworld Gaters are humanoids (laterally symmetric vertebrate bipeds with a distinct head).

Black: Human – Four-limbed, five-fingered sexually dimorphic mammals. Limited fur and light to dark skin tones. Average size 1m60 / 1m71 (the male is the tallest). Name derived from Homo Sapiens.

Blue: Deva – Four-limbed, six-fingered with little sexual dimorphism and a gracile build. Hairless with a range of blueish skin tones from medium to dark blue. Average size 1m87. Name derived from Indu Mythology.

Green: Fursona – Four-limbed five-fingered mammals with a relative sexual dimorphism. Heavy multicolored fur cover. Average size 1m62 / 1m81 (the female is the tallest). Name derived from the Furry community. Never let a Gater name something.

Red: Lemuria – Four-limbed four-fingered squat lizards with a limited sexual dimorphism. Furless with a leathery skin of various grey tones. Average size 1m50. Name is derived from 19th century literature.

White: Gegeine – Six-limbed six-fingered marsupials with little to no sexual dimorphism. Limited fur covering with light fur and skin tones. Average size 1m78. Name is derived from the Greek Mythology.