Azrael

Ok, might need some help here. I've started collaborating with a writer, intending to create a comic book series. We're working out the details of the story, but we're undecided on what style to go with for the art. This is one of the main characters, Azrael the Archangel of Death. He's a robot. An angel robot. The other characters will be a 12 year old girl, a Viking, a Samurai, and various other historical characters. Oh, and other robot angels and demons. A robot Satan. Priests with gatling guns. Those kinds of things. Anyway, any particular style here work for you? I mean, I'm pretty happy with the design, just unsure how to present/color it.