Here is an outfit inspired by the King of Hell, Crowley from the show, Supernatural.
Since Crowley is a business man, this outfit leans towards office wear. It is completely black but I tried to have different textures and material so it is a little more interesting. Crowley outfit is similar to Castiel's as the coat is the key piece in the outfit so I tried to find one most similar to Crowley's coat. The rest I tried to put a feminine touch to it. That's about it.