photorealistic shoulder-up closeup portrait of SK4N_ZF_v5, Fair skin with subtle facial freckling, strawberry-red hair, light hazel eyes, soft facial features, looking directly forward with quiet intensity, wearing matte tactical olive-green exo-armor with high reinforced collar framing neck, large contoured brushed-steel breastplate with deep angular V-cut revealing natural cleavage at lower frame, subtle carbon-fiber layering and green circuit accents, diffused cool fluorescent lab light from overhead, sharp in-focus background of blurred tool racks and metallic panels, realistic skin subsurface scattering and micro-texture, cinematic soft contrast, ultra-sharp lifelike facial detail, 8k photoreal