Emma Gilbert (Claire Holt) Emma enjoys horse riding, swimming and working at JuiceNet Café, which becomes Rikki's in Season 3. Her mermaid powers allow her to freeze anything that contains water, and later to freeze without water. In Season 3, Emma is traveling the world with her family. Emma is in seasons 1 and 2. (l)(l)
Rikki Chadwick (Cariba Heine) Rikki's not very outgoing and quite a rebel, but is always there for her friends. Her special power allows her to boil water and anything with water in it; she is later able to control fire and lightning as well. Rikki is in seasons 1 - 3.