Androids are biomechanical constructs created in technological cr\xe8ches called foundries. While the first androids are believed to have been mostly biological, difficult to distinguish from the humans they lived among, Modern designs are more varied, and many favor metal skeletons and processors that support synthetic organs and living flesh. Nearly all androids feature a humanoid body shape and tattoo-like circuits that glow through their skin when operating at full power, but beyond this commonality, variations in physical appearance reflect an android’s design, role, and personality. Some take pains to blend into human society, while others deliberately display their mechanical nature. Though some androids are constructed or customize themselves to look like other races, such Models are relatively rare. Due to their biological components, androids need to eat and sleep, but as constructed beings they do not reproduce in the human fashion and have no biological need for gender—some identify strongly as male or female, while others shift fluidly or ignore it altogether, and still others actively reject it on philosophical grounds as a relic of their former slavery.

Though android bodies are assembled using tiny machines called nanites, their complex nervous systems attract and integrate souls in the same way organic creatures do. Most androids are fully grown at the time of their birth, and can technically live forever through constant repair, though most androids voluntarily release their bodies after a century or so to allow new souls to inhabit them—a process called renewal that’s viewed more as procreation than suicide.

Androids have no single naming convention. Many take names from the cultures in which they first awoke, or from media they enjoy. Some accept call sign–like names based on appearance, personality, or exploits. Still others go by numbers as a deliberate reminder of their mechanical nature, or a combination of name and number denoting how many times the body their soul inhabits has been renewed. Some sample android names include Asha, Blue-17, Emene-3, Flick, Garro, Iseph, Melody, Naga, Olas, Stringer, Twenty, and Yose.