Some spirits were by nature unconnected to physical bodies. These figures were called tuurngait (also tornait, tornat, tornrait, singular tuurngaq, torngak, tornrak, tarngek). Some were helping spirits that could be called upon in times of need. Some were evil and monstrous, responsible for bad hunts and broken tools. They could also possess humans, as recounted in the story of Atanarjuat. An angakkuq with good intentions could use them to heal sickness, and find animals to hunt and feed the community. He or she could fight or exorcise bad tuurngait, or they could be held at bay by rituals; However, an angakkuq with harmful intentions could also use "tuurngait" for their own personal gain, or to attack other people and their tuurngait.
Though once Tuurngaq simply meant "helping spirit", it has, with Christianisation, taken on the meaning of demon in the Christian belief system.
Read more about this topic: Inuit Mythology