1girl, solo, Arona, blue halo, blue eyes, blue hair, short hair, single braid, hair over one eye, flat chest, white hair bow, white hairband, long hair, looking at viewer, blush, open mouth, collarbone, ahoge, barefoot, indoors, water, feet, wet, toes, heterochromia, halo, soles, happy, partially submerged, tiles, foot focus, bathing, bath, bathroom, bathtub, tile wall, rubber duck, frills bikini, arona (blue archive)