Emma is a very pretty teenage girl, and has golden hair and blue eyes. Her hair is extremely long, reaching along her waist. Her skin is quite fair and smooth.
In Season One, she usually lets her hair down, but as the series progresses, she begins to tie it up like Rikki and Cleo. As a mermaid, her hair is let down and she has an orange-scaled tail with a matching top.
In the episode"Red Herring" , Emma decided to change her hair color, but Cleo accidentally dyes it completely red. Since her hair's color changed when she was a mermaid, her normal hair returns when she is human. In the end, she decides to change it back to her old color.