The Terrible GaggleFranx
(I wonder if anyone can tell I've been reading Douglas Adams' Hitchhiker's Guide to the Universe series?)
Anyway, the Terrible GaggleFranx is a beast of utter horror. His hands are 6 ft high, with each finger measuring in around 3 ft. His nails, which are usually filled with dirt, cracked and chipped, are at 6 inches long and almost as thick. The thing that makes the GaggleFranx so terrible is what it does to it's captives. It has to perform manicures on it's hideous phalanges and whistle Wrecking Ball the entire time.
It's complex eyes, which are made up of 16 different color receptors, compared to our three, make it highly sensitive to any mistakes you might make in the proper color choice for it's nails. If he's unhappy with the result, you will have to start the whole thing over again, only whistling Hit Me Baby One More Time instead.