Hattifatteners are fictional creatures from the Moomin series created by Tove Jansson. They are tall, slender, and have a ghostly appearance, often depicted as white, with a simple, rounded shape. Hattifatteners are known for their quiet, wandering nature and are often seen traveling in groups. They are drawn to thunderstorms and are said to have a mysterious connection to electricity. These creatures do not speak but communicate through gestures and movements. Hattifatteners are curious and somewhat enigmatic, often representing themes of isolation and the search for belonging in the Moomin universe. Their unique characteristics contribute to the whimsical and imaginative world of the series.