The Groke (Swedish name Mårran, Finnish name Mörkö) is a fictional character in the Moomin stories created by Tove Jansson. She appears as a ghost-like, hill-shaped body with two cold staring eyes and a wide row of white shiny teeth. In the book Who Will Comfort Toffle?, it is mentioned that she has a tail, but it has never been seen. Wherever she stands, the ground below her freezes and plants and grass die. She leaves a trace of ice and snow when she walks the ground. Anything that she touches will freeze. On one occasion, she froze a campfire by sitting down on it. She seeks friendship and warmth, but she is declined by everyone and everything, leaving her in her cold cavern on top of the Lonely Mountains.
