Performer(s) Appeared in Jack Frost is a sprite-like character with roots in Viking lore, where he is known as Jokul Frosti ("icicle frost"). In Britain and the United States, he is a variant of Old Man Winter and is held responsible for frosty weather, for nipping the nose and toes in such weather, coloring the foliage in autumn, and leaving fernlike patterns on cold windows in winter. He sometimes appears in literature, film, television, song, and video games as a sinister mischief maker.