1girl, arknights, bare_shoulders, blunt_bangs, blush, closed_mouth, clothing_cutout, collarbone, cropped_torso, green_eyes, hat, horns, long_hair, looking_at_viewer, nightingale_(arknights), shoulder_cutout, simple_background, smile, solo, sweater, turtleneck, turtleneck_sweater, upper_body, wei_sa, white_background, white_headwear