Who is Prince Humperdinck from The Princess Bride and what is their importance?

The Prince's size and short stature mean that he must walk like a crab in a sideways motion. Humperdinck's only real passion is hunting. He does not care to assume the throne and he enjoys waging war on neighboring countries, but more than anything he loves the thrill of the hunt. Humperdinck has no interest in marriage, as a family will only impede his hunting. Humperdinck's first attempt at murdering Buttercup fails and he takes matters into his own hands. The reader may begin to believe that Humperdinck begins to actually care for Buttercup as their courtship is long and drawn out.