Gabriel Angelos - Cyrene: Like many of the Blood Ravens, Gabriel was born on the planet of Cyrene, from whence the Chapter often drew its Neophytes. He had grown up on Cyrene with the Blood Ravens' Librarian Isador Akios, whom he trusted above all other Battle-Brothers in the Chapter because of their childhood friendship. Unfortunately, during the Blood Ravens' campaign on the planet Tartarus, Akios was corrupted by an agent of Chaos and later betrayed his longtime friend and the entire Chapter. Gabriel was an accomplished leader of his peers before he even entered his teen years, and passed the Blood Trials set by the Blood Ravens Chaplains as an Aspirant.Many standard years later, with an entire company of Blood Ravens under his command, Gabriel returned to Cyrene, to preside over the Blood Trials and recruit new members into the Chapter. But Gabriel found something very wrong during the trials, and cut them short. He quickly returned to his Strike Cruiser, and sent a coded signal out of the system. Within solar months of the signal's transmission, ships of the Inquisition's Ordo Malleus and the Imperial Navy appeared over Cyrene, executing an Exterminatus order bombarding it for a solar week straight with Cyclonic Torpedoes until nothing on the planet remained alive. All records of the incident, and Gabriel's message to the Inquisition, have been sealed, but Gabriel himself carried the guilt of his actions with him forevermore, particularly during the battles fought on the planet Tartarus.The reason for Gabriel's guilt was simple. When the Imperial fleet had arrived in orbit above Cyrene, it had first despatched a full Brotherhood of the Grey Knights, alongside a detachment of Storm Troopers and the Blood Ravens already present to cleanse the suspected Chaos infestation. But what they discovered was not the usual forms of Chaos corruption but a world in the midst of a great cultural change, ready to throw off the shackles of the Imperial Creed and embrace forbidden ideas such as planetary democracy, free trade with xenos species, and allowing psykers to practice their powers unrestricted while living among the population without stigma or being handed over to the Black Ships.Gabriel assisted the Grey Knights, the Imperial Guardsmen and his brethren as they began to cleanse the world of its Heretics, but he ordered one squad of Blood Ravens led by Sergeant Ulrey to search for one individual in particular -- his father, Esmond Angelos. A former soldier of the Astra Militarum, Gabriel believed that his father would always have remained a staunch defender of the Emperor's values no matter what insanity the rest of Cyrene had chosen to embrace. He intended to find his father and rescue him before the inevitable claimed Cyrene. But to his utter shock, when he finally located his father, he learned that Esmond not only supported the growing rebellion against the Imperium, but was recognised as one of the foremost leaders of the movement for political change.Esmond had come to despise the Imperium for many reasons, but the fact that his own son had been claimed as a Space Marine was high atop his list of grievances. Esmond cursed Gabriel for having become the Emperor's butcher and declared that he wished his son had died in childbirth with his mother rather than serve the immoral cause of the Imperium. Realising that his homeworld was lost in the sight of the Emperor, Gabriel whispered a final prayer for Cyrene and then executed the Heretic who had once been his father with a bolt to the head. The remaining Imperial forces withdrew and the world was subjected to Exterminatus before its dangerous ideas could infect any more of the Emperor's domain.