A Maia dedicated to smaller plants and animals, Mock traveled over all the settled and wooded lands of Eriador in the guise of a wandering herbalist, peddler, and madman. He was capable of changing his form to appear as an ancient elf, a young man, or a small hobbit-child. Mock had a zest for verbal humor, riddle games, and practical jokes. He had a soft spot for children and animals and never subjected such beings to his tricks. He aided the helpless when he met them and might go out of his way to humble the proud and cruel.