1girl alternate_costume arknights athrun1120 backless_dress backless_outfit bare_back bare_shoulders black_dress black_footwear black_pantyhose breasts brown_pantyhose chain closed_mouth dress floating_hair frilled_gloves frills from_behind full_body gloves high_heels highres holding holding_sword holding_weapon horns long_hair looking_at_viewer looking_back medium_breasts pantyhose petals purple_eyes red_gloves red_hair simple_background single_glove sleeveless sleeveless_dress smile solo surtr_(arknights) sword weapon white_background wind