Jack Frost is the personification of frost, ice, snow, sleet, and freezing cold, and is variant of Old Man Winter who is held responsible for frosty weather, nipping the nose and toes in such weather, coloring the foliage in autumn, and leaving fern-like patterns on cold windows in winter. Unlike most spirits, however, he is a loner, the classic rebel without a cause, sarcastic and mischievous. As the manifestation of winter, Jack Frost is capable of manipulating ice and snow. He is the spirit of mischief and chaos personified.
Jack's appearance can vary from tale to tale, although he is commonly depicted as having icy dark blue hair, striking blue eyes, and pale bluish skin. He has a tall stature, albeit quite slim. His clothing is a pale shirt, small branches of leaves collecting around the ring of the collar and other areas, and trousers bound with darker material starting from the knee down to the rather tattered and frayed bottom. He carries around a magical staff with a G-shaped arch, resembling a shepherd's crook. It is Jack's gateway to help him unleash his powers of conjuring snow, ice, and frost as well as allowing him to fly.
Jack Frost is traditionally said to leave the frosty, fern-like patterns on windows on cold winter mornings (window frost or fern frost) and nipping the extremities in cold weather. He has become far less prevalent in the modern world due to the advance of double-glazing, but Jack Frost remains a well-known figure in popular culture. He is sometimes described or depicted with paint brush and bucket coloring the autumnal foliage red, yellow, brown, and orange.
Jack is both the Spirit of Fun and Winter, but is a surprisingly powerful and a cunning trickster. His task is to make children have fun, while bringing joy and fun times with Winter and snow days, thereby making them happy and bolstering their faith. As the Spirit of Fun, Jack can bewitch others with feelings of fun, joy, and laughter with his snowballs or even his snowflakes. Jack Frost has a special kinship among the world of leaves. He can command the leaves of any tree or plant (other than Mandrake) and use them as spies to keep watch. They can change color, fly and even return to their tree if he tells them. They speak to Jack as though he were one of them and revere the spirit as a king.