1girl alternate_costume arknights bangs blush breasts closed_mouth ear_piercing grey_background hair_between_eyes highres horns large_breasts long_hair long_sleeves looking_at_viewer mudrock_(arknights) piercing pointy_ears red_eyes risshu sidelocks simple_background smile solo sweater turtleneck turtleneck_sweater upper_body very_long_hair white_hair white_sweater