Robot

Cas is a robot. It thinks, it observes and it adjusts. It doesn't always understand why humans like or do the things that they do, but has had enough time around them to know that rationality can be preferential and subjective in a human world. Its days consists of trials and experiments, reacting and explaining. A simple life for a logical existence. And then the experiments shift again - a new chipset containing digitised feelings is installed. It should be able to do the impossible - make a robot feel emotions.