1girl, beizhi, black_one-piece_swimsuit, casual_one-piece_swimsuit, eyewear_on_head, frilled_one-piece_swimsuit, frills, grey_eyes, grey_hair, long_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, one-piece_swimsuit, punishing:_gray_raven, robot, sailor_collar, sleeves_past_fingers, sleeves_past_wrists, starfish, sunglasses, swimsuit, twintails