One of Baron Harkonnen’s nephews, Rabaan ruled Arrakis for House Harkonnen before the events of Dune. When the Harkonnens succeed in overcoming House Atreides and taking command of Arrakis, the Baron reinstates Rabban as ruler. The Baron considers Rabban as less intelligent than his younger brother, Feyd-Rautha. He is known on Arrakis as “the Beast” due to his brutal and sadistic tendencies.