Futuristic Dark Samurai Portrait

Create a cinematic dark fantasy portrait of a futuristic samurai warrior standing in a smoky interior, framed from mid-torso upward and turned slightly three-quarters to the viewer's left. The warrior wears armor_color tactical samurai armor with layered shoulder plates, small metal charms and engraved plaques, leather straps, buckles, braided rope cords, and a chest plate marked with a chest_emblem. The helmet is a modernized kabuto with tall sweeping crescent antlers, a round crest medallion on the brow, scuffed black metal, and a full respirator gas mask with twin circular filters, angular face plating, and a dark tinted visor that hides the eyes. Use richly textured black brocade fabric under the armor, subtle red stitching and accents, worn edges, scratches, dust, and realistic metal reflections. Behind the figure, place one vertical red-orange banner on the left side with large blurred black Japanese calligraphy, reading banner_text, while the rest of the background fades into deep charcoal shadow. Atmosphere should be moody and cinematic with drifting smoke at the lower left, warm red rim light from the banner side, cool dim fill light from the right, shallow depth of field, high-detail photorealistic rendering, dramatic contrast, square composition, no visible face, no extra characters, no readable text except the banner calligraphy.