Raven is a playable Soldier character associated with the Nevermore subclass.
Nothing is known about the shadowy figure, save for the fact that he is a man of few words, he may or may not be a demon, he has two guns, and that he is loyal to himself. Thankfully, however, it seems he is also fond of mowing down husks with his aforementioned twin pistols, so one might be safe to say that he is an ally to Homebase. If only due to his interests and Homebase's being similar.
Raven may appear as an additional subclass.