xiao sa (hayatekkk), nagusa (blue archive), nagusa (swimsuit) (blue archive), blue archive, commentary, highres, untranslatable commentary, 1girl, artist name, bikini, blue sky, braid, breasts, bubble, cleavage, cloud, colored eyelashes, day, hair ornament, halo, holding, holding umbrella, innertube, jacket, jacket partially removed, jewelry, long hair, looking at viewer, medium breasts, mountainous horizon, necklace, ocean, official alternate costume, on innertube, purple halo, see-through clothes, signature, single braid, single braided sidelock, sky, snowflake hair ornament, snowflake halo, solo, swim ring, swimsuit, umbrella, water, wet, wet clothes, wet jacket, white bikini, white eyelashes, white eyes, white hair, white jacket