1girl, alternate_costume, animal_on_head, bird, bird_on_head, bird_wings, blonde_hair, breasts, chick, clothes_writing, covered_navel, lifebuoy, lifeguard, mata_(matasoup), multicolored_hair, niwatari_kutaka, on_head, open_mouth, poolside, red_eyes, short_hair, short_sleeves, sitting, solo, swimsuit, touhou, two-tone_hair, wading, whistle, whistle_around_neck, wings, yellow_wings