niwashi nero, firefly (honkai: star rail), honkai: star rail, honkai (series), highres, 1girl, :o, animal ears, black panties, black ribbon, blush, breasts, brown hairband, cat ears, cat lingerie, cat tail, cleavage, gradient hair, green pupils, grey hair, hair between eyes, hair intakes, hair ornament, hair ribbon, hairband, large breasts, long hair, multicolored eyes, multicolored hair, open mouth, panties, paw pose, ribbon, solo, string panties, tail, teeth, trick or treat, underwear, upper teeth only