Duriel (Dark Angels)
He was also the senior Forge-wright and Master of the Ironwing, who was taught in the Terran forges of of Narodnya and Manraga. After he suffered grievous wounds in battle, Duriel was installed within the command chair of the Invincible Reason and was given the additional title of Castellan. This meant, that he had overall command of the warship, when his Primarch Lion El'Jonson was not aboard. Duriel was among the Legion's forces, that their Primarch led while investigating the unrest and strange disappearances occurring around Muspel.