1girl, aoi_tooru, arknights, arm_up, armpits, backlighting, black_nails, black_one-piece_swimsuit, breasts, brown_hair, casual_one-piece_swimsuit, cleavage, collarbone, cowboy_shot, flower, gradient_sky, hair_flower, hair_ornament, indigo_(arknights), long_hair, nail_polish, one-piece_swimsuit, one_side_up, parted_lips, pink_sky, pointy_ears, purple_eyes, see-through, skindentation, sky, small_breasts, solo, star_(sky), starry_sky, swimsuit, tail, thigh_strap, very_long_hair, wading, water, white_flower