The character Emma Gilbert is played by Claire Holt.
She is best friends with Cleo Sertori and Rikki Chadwick. She has a confident and responsible, if somewhat controlling, personality. She has the ability to freeze water, and later develops the ability to manipulate clouds, ice and snow.emma is to erashonal to believe in mermaids,but once she grows a tail she's determaned to make the most of it, but her mermaid keeps her from her life's goal. Emma is also important, for she found the first necklace.