Before a magical moonlit night changed everything, Cleo was a shy, awkward girl with no idea how to swim. Once she transformed into a mermaid, she had to get past her watery fears and dive right into a new identity. Now she's stronger and more self-confident, but she also has more secrets. Emma and Rikki are braver than Cleo is, but ready or not, she's in for a major adventure.
Special power: Cleo has the ability to move and control water, just by thinking about it.
Typical quote: "Why me? I didn't ask for this to happen."