nanano ayano, original, bad id, bad pixiv id, 1girl, :d, arched back, bikini, blue eyes, blue hair, bubble, coral, eyelashes, female focus, fins, fish, foreshortening, gem, hair ornament, jewelry, looking at viewer, matching hair/eyes, mermaid, messy hair, monster girl, necklace, open mouth, outstretched arm, pearl (gemstone), pearl necklace, scales, seashell, seaweed, shell, shell bikini, smile, solo, sunlight, underwater, upside-down