1girl, arknights, bare_arms, bare_shoulders, beach, bikini, black_bikini, blue_hair, blue_sky, breasts, ch'en_(arknights), ch'en_the_holungday_(arknights), cloud, cowboy_shot, day, dragon_horns, dragon_tail, folded_ponytail, front-tie_bikini_top, front-tie_top, groin, hair_between_eyes, horns, large_breasts, long_hair, looking_at_viewer, navel, ocean, onyxia_(lichviper), open_mouth, outdoors, red_eyes, sky, solo, standing, stomach, swimsuit, tail, thighs, water