I cannot even express how much this should be a Graves skin
http://www.listoid.com/image/66/list_2_66_20101210_081738_673.png
Why isn't there an alien hunter graves? or even just futuristic graves? Make him a black man like you made Lucian a white man in hired gun. Please, this fit too well to not be a thing.
Give him a suit and everythang.
Or, ya know.... whatever.