Althea is a minor character in "Emily Wndsnap and the Monster Deep." She is Emily's age, with jet black hair tied back in a ribbon that looked like golden seaweed. Her tail is green, with little silver stars painted at the end. Her best friend is a mermaid named Marina.

The Monster DeepEdit

Althea was one of the mermaids who persuaded Emily to go into the lagoon on Allpoints Island, where she wakes the Kraken. At first, she makes Emily slightly jealous, cause she thinks of Althea as competition over her friend Shona, but in the end they both apoligize and become friends.