1girl absurdres alternate_costume arknights baseball_cap black_one-piece_swimsuit blue_hair blue_sky boat breasts ch'en_(arknights) ch'en_the_holungday_(arknights) cleavage cloud collarbone day eyewear_on_headwear hat highres horns horns_through_headwear innertube knees_up large_breasts long_hair njnywy official_alternate_costume one-piece_swimsuit outdoors rainbow red_eyes sailboat sitting sky solo sunglasses swimsuit water watercraft white_headwear