- Bogy - Goblin - Imaginary imp - Imaginary imp said to cause problems with WWII aircraft engines - Mischief-maker - Mischievous invisible being - Mr Nigel made production glitch
- Conscientious - Conscientious, but ruins studio anyway - Energetic - Hard-working - Given to industry; characterized by diligence;
constantly, regularly, or habitually occupied; busy; assiduous; not
slothful or idle; -- commonly implying devotion to lawful and useful
labor. - Steadily and perseveringly active in a particular
pursuit or aim; as, he was negligent in business, but industrious in
pleasure; an industrious mischief maker.