Characteristics
In Dune, Herbert notes that the Baron possesses a "basso voice" and is so "grossly and immensely fat" that he requires anti-gravity devices known as suspensors to support his weight. It is implied by Margot Fenring that the Baron has allowed himself to become obese.
As ruthless and cruel as he is intelligent and cunning, the Baron's greatest skill is his talent for the subtle and clever manipulation of others through their weaknesses or his understanding of human nature. His sexual preference for young men is implied in Dune and Children of Dune. It is noted, however, that he "once permitted himself to be seduced" in the liaison which produced his secret daughter.
Read more about this topic: Vladimir Harkonnen