1girl, arona_(blue_archive), bikini, black_bikini, blue_archive, blue_eyes, blue_hair, blush, braid, closed_mouth, frilled_bikini, frills, hair_over_one_eye, halo, looking_at_viewer, medium_hair, multicolored_hair, navel, pink_hair, sasado_serori, short_hair, simple_background, single_braid, sitting, solo, stomach, swimsuit, two-tone_hair, water, white_background