This was a request i received the work, the coat and the long hair, where the guides to the final concept, i fill the gaps with my own ideas, so i said well this is like a warrior (the standing pose suggest this to me), so my train of thoughts was something like this: The only time a warrior use a coat is when is an official in a military organization, but the long hair suggest otherwise, at least in the modern military organization short hair is a requirement and it seems to me that it will be in the near future, so the long hair shows that he went rogue at sometime or at least is not actively working on a military organization anymore, the badge, the uniform its tho show that even if he is not working actively in the militia it is an important part of him, the metal belt was also present to in your work so i took re-enforce it to the military looks, in the matter of the weapons well i'm currently reading The Dune Saga, so the Crysknife from the Fremen was the inspiration.