1girl, ahoge, animal ears, aoko (amamiya aoko), arknights, bare shoulders, beach, bikini, black bikini, blue eyes, blue sky, blush, breasts, cleavage, cloud, cloudy sky, fox ears, hair ornament, hairclip, looking at viewer, low twintails, official alternate costume, oripathy lesion (arknights), outdoors, sand, short hair, short twintails, sky, small breasts, solo, spaghetti strap, sussurro (arknights), sussurro (summer flowers) (arknights), swimsuit, twintails, upper body, water