Upon talking to Phil, I've reached the conclusion that this clockwork soldier is a weapon of war, a 'person of mass destruction'. I'm alternating between it being purely a clockwork automaton that has somehow developed sentience and a human brain (or part of one) piloting a clockwork body. Either way, the clockwork soldier has become outmoded and is no longer an effective weapon, so his creators want rid of him. Unfortunately, he is very well-made; so well-made, in fact, as to be completely tamper-proof, so deconstructing him is out of the question, and simply setting him free is too risky given his weaponised nature. As a result, he has been locked away and forgotten in some vault or bunker somewhere, to wait for the day he finally stops.
Phil and I discussed the possibility of the soldier being a reluctant warrior, not wanting to harm anyone but, being what he is, having no other choice. I imagine him as quite a gentle soul, not naturally aggressive but with a truly impressive in-built arsenal that makes him a danger to be near. Locked away in his vault he tries to hang on to the human soul he either has or developed, surrounding himself with personal treasures and trying to make the dead, empty vault into a home. Despite being completely alone and isolated he still tries to live as well as he can.
A not-so-quick concept painting where I just noodled with design and tried to force myself to design in perspective and on the fly, something I really struggle with (check out all the isometric drawings in the thumbnails for proof of this). Not fond of the actual rendering, but design and perspective-wise I'm not unhappy at all.
And, just to finish, a super-quick study of Al Capone's prison cell, to get a feel for a 'home-y' prison.