Urchin (Runescape)

Urchin is a mermaid from the game Runescape. She appears in the quest Deadliest Catch.

Biography
Urchin resides on a small island in the Northern Sea, alongside her sisters, Tentacle and Anemone. The mermaids control a sea monster called the Thalassus. They claim to use it as protection against humans but they enjoy feeding people to the creature.