Cleo Sertori is one of the main characters who becomes a mermaid in the Australian television series, H2O: Just Add Water. Along with Emma and Rikki, Cleo discovers her powers after her trip to Mako Island.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
