Rohan Krause is the main antagonist in Castlevania: Order of Shadows. He is the leader of The Order, an organization that aims for the resurrection of Count Dracula in their own search of power and immortality.
Rohan Krause is the leader of an organization in the 17th Century known simply as The Order. He plotted the resurrection of Count Dracula by using a blood sacrifice in his aim to gain power and immortality while serving at his side. He claims to have killed Desmond Belmont's parents, even though he had the Vampire Killer. He's a master of alchemy and was in possession of the Magic Gauntlet, the very same item Rinaldo Gandolfi had given to Leon Belmont centuries ago.
However, the Belmonts and their allies were able to track down the The Order long before they were ready to revive the Dark Lord properly. He's defeated at the hands of Desmond, who stated that he was only seeking the prevention of Dracula's revival, not revenge for what he had done to his father.
Even though his dreams of becoming one of Dracula's right-hand men during his reign were shattered, his own blood was sufficient to raise his lord, and Desmond had to battle an early risen Dracula shortly afterward.
Rohan is the penultimate boss in Castlevania: Order of Shadows. He fights by using a variety of alchemy attacks which Desmond is also able to use, including the Hellfire, Firestorm, Frostbolt and Thunderbolt.