1girl, arknights, bare_legs, barefoot, baseball_cap, beach, beach_chair, black_jacket, blue_hair, blue_sky, blush, bm_(bm364364), breasts, ch'en_(arknights), ch'en_the_holungday_(arknights), cloud, cloudy_sky, dated, day, dragon_horns, eyewear_on_head, feet, foot_focus, full_body, hair_between_eyes, happy_birthday, hat, horns, horns_through_headwear, jacket, knees_up, legs_together, long_hair, looking_at_viewer, medium_breasts, miniskirt, no_tail, official_alternate_costume, outdoors, parted_lips, red_eyes, sidelocks, sitting, skirt, sky, soles, solo, sunglasses, thigh_strap, toes, twitter_username, white_headwear, white_skirt