1girl, ahoge, bare_shoulders, barefoot, beach, beach_umbrella, black_one-piece_swimsuit, casual_one-piece_swimsuit, character_name, detached_sleeves, eyewear_on_head, feet, grey_eyes, hair_between_eyes, lifebuoy, long_hair, messy_hair, no.21's_buddy_(punishing:_gray_raven), no.21:_xxi_(punishing:_gray_raven), no.21:_xxi_(solar_frost)_(punishing:_gray_raven), no.21_(punishing:_gray_raven), non-humanoid_robot, ocean, one-piece_swimsuit, punishing:_gray_raven, robot, sleeves_past_fingers, sleeves_past_wrists, soles, sunglasses, swimsuit, toes, umbrella, white_hair, white_sleeves, xe367