Anime character with long gray hair and blue shirt holding a gun

1 male doctor, gray hair, blue eyes, (cowboy_shooting:1.2), Face focus, long hair, side lock, Fear的,(Fear:1.1) Express, mood lighting, moody, dark, In an abandoned old museum, Clear glass display case，filled with interesting items, dusty, post-apocalyptic, net, superb, Beautiful 8k wallpaper, Very detailed, complex

(EasyNegative:0.8), bad anatomy, disfigured, deformed, malformed, mutant, gross, disgusting, out of frame, nsfw, poorly drawn, extra limbs, extra fingers, missing limbs, blurry, out of focus, lowres, bad hands, error, missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, username