Yggdrasil, The World Tree, has several animals associated with it. A huge eagle perched at the top. 4 stags that munch on its leaves, a serpent gnawing at its roots. But one in particular is extra mischievous.
This little red squirrel is a trouble maker. He’s supposed to give messages along the trunk of the tree from the eagle at the top to the serpent at the bottom. But he tends to do so with some added twists that make the messages sound like an insult.
This fuzzy red mischief-maker is Ratatoskr.