Azrael

Supreme Grand Master Azrael is the Chapter Master of the Dark Angels Chapter of Space Marines in the late 41st Millennium. He proceeds Brother Rhamiel, and carries the title of "Keeper of the Truth". Believed to have been recruited from the headhunters of the feral world of Kimmeria, Azrael is considered to be one of the greatest Chapter Masters of the Dark Angels. He rose quickly through the ranks of the Chapter, especially for his heroic performance during the scouring of Truan IX and the crushing of the Techno-Revivalist uprising on Faze V. The extremely secretive nature of the Dark Angels makes Azrael's achievements after these events nearly impossible to trace, but it is known that he was appointed to the Veteran Deathwing Company, and then to Captain of the 3rd Company. He later became Master of the Chapter's Deathwing Company, and it was to no one's surprise that he was appointed Chapter Master after the last Grand Master of the Dark Angels died. At this point, Azrael was given the title "Keeper of the Truth", and presented with two relics of the Chapter: the Lion Helm (which was previously worn by the Dark Angels' Primarch Lion El'Jonson) and the Sword of Secrets, foremost of the fabled Heavenfall blades, created from a meteorite that struck the Rock, the Dark Angels' mobile fortress-monastery, after the Horus Heresy. In battle, Azrael is always accompanied by a short, mysterious creature of unknown origin known only as a Watcher in the Dark, who carries the Lion Helm.