1girl, arknights, auuuie, bare_legs, bare_shoulders, bikini, blue_sky, breasts, brown_eyes, brown_hair, cleavage, cloud, coat, day, medium_breasts, navel, official_alternate_costume, open_clothes, open_coat, roberta_(arknights), roberta_(summer_flowers)_(arknights), rock, short_hair, short_shorts, shorts, sky, solo, starfish, stomach, swimsuit, tail, thigh_strap, thighs, water, white_bikini, white_coat, white_shorts