1girl, arknights, black_coat, black_dress, black_nails, black_thighhighs, coat, commission, dress, garter_straps, grey_hair, hand_up, long_hair, long_sleeves, looking_at_viewer, no_headwear, open_clothes, open_coat, saiko_(saisaka), skeb_commission, solo, specter_(arknights), thighhighs, very_long_hair, water