1girl, ankoro_mochi, arknights, bare_shoulders, baseball_cap, bikini, black_bikini, black_hair, blue_sky, breasts, ch'en_(arknights), ch'en_the_holungday_(arknights), cleavage, clothes_writing, collarbone, day, dragon_girl, dragon_horns, dragon_tail, hat, horns, horns_through_headwear, knee_up, large_breasts, long_hair, looking_at_viewer, navel, outdoors, parted_lips, red_eyes, sidelocks, sitting, sky, smile, solo, swimsuit, tail, underboob, white_headwear