Poltergeist
A poltergeist was a mischievous spirit that supposedly manifested itself by noise and the creation of disorder.

In 2367, Captain Jean-Luc Picard jokingly suggested to Lieutenant Worf that a poltergeist may have been responsible for knocking his desk monitor and other items onto the floor in his ready room. Worf was more inclined to believe that an intruder was responsible, and recommended going to red alert, which Picard vetoed; his next suggestion that a security officer stand guard was also vetoed in favor of mere caution. ()

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Mythological figures