yui (niikyouzou), frostnova (arknights), arknights, official art, 1girl, animal ears, black gloves, black thighhighs, boots, closed mouth, dress, floating, floating object, floating weapon, full body, gloves, grey boots, grey dress, grey eyes, grey hair, hair ornament, hair over one eye, hairclip, holding, holding knife, holding weapon, hood, jacket, knife, looking at viewer, medium hair, one eye covered, rabbit ears, rabbit girl, scar, scar on face, scar on nose, short dress, simple background, solo, standing, tachi-e, thigh boots, thighhighs, thighhighs under boots, torn clothes, torn jacket, transparent background, weapon, white jacket, zipper