Not surprisingly,
Perky is not an Ent, but a gloriously illuminated dust mote. He catches rides on sunbeams and wafts right into our sight, bringing his endlessly cheerful persistance with him and dancing 'round quizzes and clues with playful ease. When a sunbeam disappears by being soaked into an object, Perky simply hops onto another beam, warming to another idea or game, and tickling our noses with another delightful round of impetuousness.