1girl, :d, air bubble, bangs, bare arms, bare shoulders, bikini, bikini top only, blue hair, bracelet, braid, bubble, day, elliot leucosia, enjo kouhai, head fins, jewelry, light rays, looking at viewer, mermaid, monster girl, monsterification, navel, open mouth, purple eyes, short hair, side braid, smile, solo, stomach, sunbeam, sunlight, swept bangs, swimsuit, takunomi, underwater, white bikini