Elodea

Elodea is a mermaid from the game Trine 4: The Nightmare Prince. She is voiced by Jess Robinson.

Biography
Elodea is one of the woodland spirits, specifically the spirit of water. She presided over the Crackling Mire. One day, people came and set up a factory in her bog, filling her waters with waste and rubbish, ruining the natural beauty. Elodea told Amadeus that the factory didn't stay for long before chuckling, implying she had something to do with its removal.

While in search of the runaway prince Selius, the wizard Amadeus, Pontius the knight and Zoya the thief helped the mermaid's friend, the seal. This caught Elodea's eye. Much later, when the heroes became lost, they stumbled into the Crackling Mire. Elodea spoke to them through a puddle and offered her aid. Amadeus became immediately smitten with her voice.

After they reach Elodea's home, the mermaid surfaced and gave them a bottle with a little bit of her magic. She said to bring it to her brother Linden, the spirit of the woods, as he would know what to do next.

Trivia

 * Elodea is a genus of 6 species of aquatic plants often called the water weeds.