1girl absurdres animal_ears arknights bikini breasts brown_eyes brown_hair cleavage collarbone flip-flops highres jacket k@bu long_sleeves looking_at_viewer makeup_brush medium_breasts navel one_eye_closed open_clothes open_jacket open_mouth otter_ears otter_girl otter_tail roberta_(arknights) roberta_(summer_flowers)_(arknights) sandals short_hair short_shorts shorts simple_background smile solo stomach swimsuit tail white_background white_bikini white_jacket