Vardy

The Vardi were a type of microbots, small robots which collectively controlled the Emojibots that served as an interface for them. These would gather together to make buildings as well as distribute fertiliser across the colony's wheat.

When the Emojibots considered grief an enemy of happiness and thought of destroying it, they called upon the Vardi to kill anyone who wasn't happy, stripping them of skin, organs and muscle leaving behind their skeleton which would be used as fertiliser. (TV: Smile)