A vivikin is an animated object, typically humanoid (such as a suit of armor or statue), although not always. Vivikins have been animated by spiretech, invention, or magic, reflecting the life and form of something alive - but vivikins are threadless, being automata that serve a particular purpose only.
Vivikins may last for an exceptionally long time – serving as mindless automata carrying out minimal and express tasks (answering the door, scrubbing the floor, etc.). Any vivikin created for combat will attack any character that it has been told to (or not told to exclude).
Vivikins may look humanoid and they may appear to have intelligence behind their actions, but they are entirely dumb, with no real capacity to make decisions or communicate in any way.
Each vivikin must be equipped (and possibly armed) for its task. A vivikin meant for fighting will have at least one weapon and one piece of armor (to augment its natural armor of 1). A vivikin meant for labor will likely have appropriate tools at its disposal.
A vivikin can perform simple tasks that was constructed for; it can perform these tasks tirelessly, but cannot stray far from its intended use.